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  #1  
Old 03-20-2009, 08:14 PM
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1997 ford f350 7.3 liter wont start HELP!!

i really need help please ive replaced the high pressure oil pump,fuel pump,ipr,fuel filter,idm,and more and still no start can anybody help me please?
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  #2  
Old 03-20-2009, 08:21 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

First of all you need to post this in the OBS section down below.
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  #3  
Old 03-20-2009, 08:25 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Next is do you have access to a scan tool to perform some basic tests? Do you get a wait to start light, have you tried starting with the truck plugged in, what happened when this started?
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Old 03-20-2009, 08:25 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

ok thank you
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Old 03-20-2009, 08:27 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

yes i have a wait to start all night i spray starter fluid and it backfires
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Old 03-20-2009, 08:29 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Starter fluid is a bad bad idea with our engines...

Does the tachometer move when you're cranking it over?
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  #7  
Old 03-20-2009, 08:29 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Lay off the ether. Your gonna tear something up. Fix the problem and it will start.

Its not an old IDI, if there is a problem you need to fix it first.

Check the res , replace the cps, if still no start, then get a scanner . Go from there. How cold outside there?
Cold enough to need the glow plugs? If so, then check for voltage there. But AFTER you check the res on top.
No oil = no run.
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Old 03-20-2009, 08:32 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

yes it moves over
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Old 03-20-2009, 08:34 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

it's not cold at all here in georgia
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Old 03-20-2009, 08:39 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

OK lets get this started on the right foot. Post up a nice description in paragraph format of all that you have done and all the symptoms that you have noticed and then we can probably help you out.

Tom
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  #11  
Old 03-20-2009, 08:40 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

hahah, you sure you closed the right thread?? lol
I figured youd closed the one in the site feedback section. I got lost trying to find it again.

Now Im really messed up, I posted in the site feedback thread, it was also posted in the OBS section, but that thread is closed , and not the one in the site feedback section....what the ???
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Old 03-20-2009, 08:48 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Hah, now three threads. I think ya got it fixed. Thanks.
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  #13  
Old 03-20-2009, 08:48 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

i started by replacing the fuel pump,replaced injectors and o rings and it ran fine until about 2 weeks i tried to crank it, it would not crank, sprayed ether in it ,it started right up, i go down the road it ran fine but when let off the gas it cuts off, and after that it just got worse,now spray ether it will try to start but wont start it will back fire when use either ive replace the high pressure oil pump
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Old 03-20-2009, 08:50 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Checked for fuel pressure? How bout smoke? Any more than usual? Sounds like you may have issues with high pressure oil not building. Trash in IPR maybe, or you could have cut o-rings installing the injectors.
Is it showing oil pressure on the gauge while cranking over?
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Old 03-20-2009, 08:54 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

I agree I think you need to do some testing to see if you are building at least 500psi of HP oil pressure when cranking. You will need to fab up a gauge or use a scan tool to test this.

Tom
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Old 03-20-2009, 08:56 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

the fuel pressure is fine, no smoke at all,and its not showing oil pressure on the gauge while cranking it over
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Old 03-20-2009, 08:58 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

so what will make it not build up ive replace the ipr
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Old 03-20-2009, 08:59 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

No smoke at all? I'd wonder if it isn't getting fuel, or isn't getting high pressure oil.

How have you checked to see on fuel pressure?

The oil pressure "gauge" on the dash won't move until there is 7 PSI of low pressure oil. It's a dummy light with a pointer. These guys are talking about high pressure oil, which is what actually fires the injectors.

You really need to get a scanner of some type and look at ICP pressure, and IPR duty cycle.
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Old 03-20-2009, 08:59 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Look in the res. and see if you have oil within the top 1/4 inch or so. If not then you found your problem.
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  #20  
Old 03-20-2009, 09:01 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Quote:
Originally Posted by John_DeereGreen View Post
No smoke at all? I'd wonder if it isn't getting fuel, or isn't getting high pressure oil.

How have you checked to see on fuel pressure?

The oil pressure "gauge" on the dash won't move until there is 7 PSI of low pressure oil. It's a dummy light with a pointer. These guys are talking about high pressure oil, which is what actually fires the injectors.
Yes, but if it draining back (worn lpop or leak somewhere)
it wont show oil pressure on the dash until the res. is full and its building pressure on the low presure oil system again.
Def check the oil level there first. Just pull the allen head plug on top, and see where the level is.
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Old 03-20-2009, 09:02 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

the res. has oil and does it have a low pressure pump that will cause it not to crank
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Old 03-20-2009, 09:03 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Yes, but if its that, the res will not be full to the top.
Thats not your problem unless the res is low, or empty.
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Old 03-20-2009, 09:04 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

I am going to bow out from helping on this if you refuse to to take the time to write an intellegent sentence that starts with a capital letter and ends with a period. This is not a text message!
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  #24  
Old 03-20-2009, 09:52 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Do you have access to a scan tool as that would be very useful in trying to diagnosis this without tossing parts at it.

Tom
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Old 03-20-2009, 09:56 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

I took the truck to my local Ford Company, they did a diagnosis test on it which came back that I needed to replace the HPOP and IPR which I did both but it still won't start. I'm thinking it could be the LPOP.
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Old 03-20-2009, 10:06 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Quote:
Originally Posted by smorris View Post
Yes, but if its that, the res will not be full to the top.
Thats not your problem unless the res is low, or empty.
And once again.....re-read.

They dont just "go bad" , they gradually wear till they have a hard time getting primed, and sometimes lose their prime and wont pick up the oil without a lot of cranking.

If the lpop gets worn, it will first start off by firing up, and then shutting off. The after extended cranking it will re-fire, and run fine. After it wears enought, it will not fire off at all without a long crank.

If there is oil to the top of the hpop res. then THE LPOP IS NOT THE PROBLEM.

The hpop system is likey not building pressure. IPR may have trash in it, or the o-rings on the injectors may have blown through.

You said you changed out the hpop, has it ran since then?
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Old 03-20-2009, 10:10 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Quote:
Originally Posted by antron1 View Post
I took the truck to my local Ford Company, they did a diagnosis test on it which came back that I needed to replace the HPOP and IPR which I did both but it still won't start. I'm thinking it could be the LPOP.
Much better thank you. Please answer what SMorris posted item by item then we will take it from there. Also what was the concern when you brought it into the dealer for diagnosis? Was it no start when hot perhaps or something else?


Tom
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Old 03-20-2009, 11:18 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Yes I just had the HPOP AND IPR put on 2 days ago and still no start.
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  #29  
Old 03-20-2009, 11:22 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

So was it no start when you brought it in to the dealer or what?

Do you access to any kind of diagnostic equipment and who installed the pump and ipr?

FYI the batteries have to be very strong or the truck will not start. Throw a battery charger on there overnight if there is any doubt at all.
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Old 03-20-2009, 11:49 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Correct it was a no start when it was took to the dealer, and also ford installed the pump and ipr, and my batteries are both new.
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  #31  
Old 03-21-2009, 12:55 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

well if ford diaged it and did the work bring it back and tell them to fix it right.FYI, never just go throwing parts at these trucks.You will just end up with empty pockets and a truck that still wont run.Your next step should be finding a good diesel tech who has access to a ford ids scanner.A no start on these trucks i could think of 5 things right off the top of my head that it could be and theres plenty more. good luck. O by the way you could still have a bad cps even with a rpm signal.
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Old 03-21-2009, 02:01 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

So it sounds like you took it too the dealer and they threw a hpop and a ipr at it and still no start. That sounds to me like the initial diagnosis was probably flawed and a probably good hpop was replaced. If you are lacking any diagnostic tools you are probably stuck in a position to where you are going to have to find a shop that knows what they are doing that can fix it. If you shoot me your email address I have a manual that will help to explain how the hpop system works if you want.
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Old 03-21-2009, 02:24 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Make yourself a simple, cheap test gauge that u can attach to your oil high pressure oil lines where they are going into the heads. That is a very simple test, no electronic scanners are involved, its easy, and fast. It will narrow it down big time for you. It will tell you if you are getting pressure out of the HPOP and IPR, and if you are then you can move farther to see which head you are loosing the pressure in. Once you find that you can have a lot better game plan.
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Old 03-21-2009, 08:58 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

So how do you know when the cam sensor is going bad? What will the truck start doing?
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Old 03-21-2009, 09:04 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

How do you know when the CPS is going bad? What will the truck start doing?
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Old 03-21-2009, 09:11 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Quote:
Originally Posted by antron1 View Post
How do you know when the CPS is going bad? What will the truck start doing?
Well the tach gets its signal from the cam sensor. if the cam sensor was bad the tach would not move at all when you are cranking it. You should also get a code too.
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Old 03-21-2009, 09:12 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

A bad cps will usually start out by cutting off going down the road sometimes, or maybe just hiccup sometimes. Subject to just fail for no good reason. This will cause a no-start. Sometimes they will start back up, sometimes not. I still gotta bet on a hpo problem being that ether would start it up for a while. A bad cps it will fire up on ether but it will shut right back off when the ether is gone, and still not run.

So, you got a problem elsewhere more than likely.
Are you SURE that res. is still full of oil? If it has not fired up since they re-installed the new hpop, then it will still have air in that system, and be hard to start for a bit. But, if its been cranked and cranked, then it should have fired by now, unless theres another problem.
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Old 03-21-2009, 09:12 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Since you are getting no smoke at all, then its obvious you're injectors are not even attempting to fire.

I would LOAD TEST the batteries first. I know you say that they are new, but test them anyways because you've been cranking and cranking with them and could have drained them. You need at least 10.5 V while cranking or the injectors will not receive a pulsewidth to fire.

Second, if that tests out well. Replace the CPS. They are cheap.

Thirdly, you need some way to view if you are building HPO during cranking. Borrow a scanner, or ask the dealership SPECIFICALLY if they can do this for you and ask what the readings are. Like Tom said, you need at least 500 psi oil for it to fire.

Have you verified that fuel pressure is OK? if not, you need to do that also.

Also, check the oil level to make sure it is at the proper level.

One more thing, i'm just curious, but is the SES light on while cranking? Does it go out after 2-3 seconds once you turn the key on?

After you've done all this, check back and let us know what you find.
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Old 03-21-2009, 09:16 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Ok well now the truck starts with ether I know I dont suppose to do it but when I let off the gas it cut off it won't idle up by itself unless i'm giving it gas do you know what that could be?
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Old 03-21-2009, 09:19 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

STOP USING THE ETHER! YOU'RE GOING TO BLOW SOMETHING UP!

What color smoke out the tail pipe (if any) when it was running?

when is the last time you changed the fuel fitler?

You said you recently changed the oil, correct?

Have you verified fuel pressure????

Is the charging system putting out adequate voltage?

You still need to see what your ICP is doing...

is the SES light on?
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Old 03-21-2009, 09:24 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Quote:
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Ok well now the truck starts with ether I know I dont suppose to do it but when I let off the gas it cut off it won't idle up by itself unless i'm giving it gas do you know what that could be?
The truck was just running on the ether. Your injectors are still not firing. You gonna ruin that engine before you know it.
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Old 03-21-2009, 09:26 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

No the SES is not on and the smoke color is white.Where is the RFL?
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Old 03-21-2009, 09:27 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

I'm sorry the FRL.
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Old 03-21-2009, 09:36 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

can you answer all of my questions in my last post so i can help you further?

throw that either in the garbage or you could be buying a whole engine very soon.

You need to re read both of my posts in this thread. Until you do all of the things mentioned in both posts, there is nothing anyone else can do to help you. Those are things that must be checked.
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Old 03-23-2009, 06:20 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

I got the truck running again finally but when it starts to warm up or whatever it shuts off why is that? Does it has anything to do with the vacuum?
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Old 03-23-2009, 11:30 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

If it dies when it warms up I suspect that is an issue with the loss of HP oil pressure when the oil thins. Since it has a new HPOP and IPR I would next think the more common areas of concern are injector o-rings or the injectors which are bleeding off your HP oil pressure
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Old 03-24-2009, 04:46 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Does anybody know where I cam buy a PCM at? (F7TF-12A650-SA)
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Old 03-24-2009, 06:00 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Look, go get someone to hookup a scanner and pull codes. Check hpop while cranking over, duty cycle, and see what you got. Until you know the problem your gonna spend a ton of money for nothing. Advance auto scanners will NOT work. Nor any other parts store scanners I know of. You will need a good snap-on or someother high end scanner with the right software.
Or you could just keep throwing parts at it. Matter of fact, I have a pcm for a 96 manual. Not sure on the part number , but I can check. I'm betting thats not your problem. Also got a IDM if you wanna try that too.

Seriously , check the codes, and post up what you get before buying stuff you dont need.
Maybe try posting your location so maybe theres someone close by with auto enginuity might be willing to come help you out.
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  #49  
Old 03-30-2009, 05:57 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Thx anyway but I got my truck back on the road it wasn't nothing that yall posted.
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  #50  
Old 03-30-2009, 07:00 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

okay then...what was it....??
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  #51  
Old 03-31-2009, 12:43 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

he probably got a brand new crate motor. lol
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  #52  
Old 03-31-2009, 12:47 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

wouldnt be surprised with all that ether he was using.
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  #53  
Old 03-31-2009, 12:51 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

yeah. lol i am surprises that thing didnt backfire on him.
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  #54  
Old 04-02-2009, 02:28 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Quote:
Originally Posted by antron1 View Post
Thx anyway but I got my truck back on the road it wasn't nothing that yall posted.
Right, right......

Probly had a bad muffler bearing or something like that.
It couldnt have POSSIBLY been anything that we could have figured out.....
At least over the internet, without trouble codes, without ANY logical sort of testing, and without any data of ANY kind other than ," nope, it aint that, have ya got a spare pcm?"

Sorry dude. Sorry we couldnt figure out that the muffler bearing went bad on ya.
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  #55  
Old 04-02-2009, 03:49 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

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Originally Posted by smorris View Post
Right, right......

Probly had a bad muffler bearing or something like that.
It couldnt have POSSIBLY been anything that we could have figured out.....
At least over the internet, without trouble codes, without ANY logical sort of testing, and without any data of ANY kind other than ," nope, it aint that, have ya got a spare pcm?"

Sorry dude. Sorry we couldnt figure out that the muffler bearing went bad on ya.
LMFAO
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  #56  
Old 04-02-2009, 03:50 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

nope shawti did u get 1?
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  #57  
Old 04-02-2009, 03:52 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

did yours backfire on you i mean da more you try to pick the more it will come back on ya shawti!
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  #58  
Old 07-21-2009, 03:21 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

How does ones make a gauge? I'm having the same prob. One guy says it sounds like the hpop, another thinks it's the fuel pump, then a diesel tech looked at it and thinks it's the cam sensor......
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  #59  
Old 07-21-2009, 03:57 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

I'm a "Newbie" and a girl. Does everyone use that kind of language and be rude? Hope not!
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  #60  
Old 07-21-2009, 06:23 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

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Originally Posted by COBarrelracer View Post
I'm a "Newbie" and a girl. Does everyone use that kind of language and be rude? Hope not!
I'd start your own thread in the tech section, you'll get more hits.
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  #61  
Old 07-21-2009, 08:04 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

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I'd start your own thread in the tech section, you'll get more hits.
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  #62  
Old 07-21-2009, 08:19 PM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Quote:
Originally Posted by COBarrelracer View Post
I'm a "Newbie" and a girl. Does everyone use that kind of language and be rude? Hope not!
Hope no one thinks we were being rude to this guy. We all tried very hard to make him understand that things need to be checked out, and in a specific order. Logical reasons for checking stuff, not just a random replacment of parts.

I for one got kinda aggravated, and probably should have just ignored him, but thats just not in my nature. I tired and tried to explain, but he never did listen. And I'd bet you a hundred bucks that the problem he had WAS something that one or more members told him to check.

Start a thread about your current problem, be very specific, and we'll give it our best shot at diagnosis, and explain how it all works, and where to look/ what to do.

Scott
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  #63  
Old 10-02-2009, 01:25 AM
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Unhappy Re: 1997 ford f350 7.3 liter wont start HELP!!

I had my fuel filter light come on, i changed it and the truck fired up, ran for about 3-5 minutes then died. it tries to start but is just shy of actual firing.
On a 1997 F350 7.3
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  #64  
Old 10-02-2009, 02:14 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

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Originally Posted by Diggerjr View Post
I had my fuel filter light come on, i changed it and the truck fired up, ran for about 3-5 minutes then died. it tries to start but is just shy of actual firing.
On a 1997 F350 7.3
I would suggest you start a new thread, rather than tack on to someone else's old pre-existing thread. There are several symptoms folks will ask you: does the tach needle move while cranking? Does the Wait to Start light come on?

Welcome by the way, you may have to be patient but usually folks here are very helpful. It also helps to fill out your profile, so we know a tad more about your truck, and if we know where you live somebody close by may even offer assistance.
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  #65  
Old 11-18-2011, 04:41 AM
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Re: 1997 ford f350 7.3 liter wont start HELP!!

Why did this guy get all crazy gangster
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