Ford Power Stroke Nation banner

1 - 20 of 33 Posts

·
Registered
Joined
·
26 Posts
Discussion Starter #1
Originally posted by Dave (Golfer) on PSN 01-20-2010 Thanks Dave

its nevvvvver the oil pump...seriously.

I see sooooooooooooooo many guys (dealerships included) that see "no ICP" or some ICP codes in a scantool...and toss HPOP's on truck after truck...when it is either an IPR or an injector (poppet valve) issue.

If you hook up the scantool, and monitor ICP (psi) while cranking...you'll see IPR% (duty cycle) climb & climb 15% key on..20, 30, 40, 55%, higher..the increase in IPR% means that the PCM is requesting ICP pressure to increase...

so ALSO watch ICP(psi) and if it comes up to only 180-250psi or so and stays there...then it's the IPR hung open (bypassing oil back to the oil pan through the front cover) such that only minimal psi can be made.

If the ICP is VERY low...like under 60psi...then it could be injector (poppets) pissing oil (under the VC's)..which is typical for injector with more than 180-200k miles.

if ICP climbs above 550-600..then it will probably climb much higher (15-1800+) and it is most likely going to be an electrical issue.

If his scantool will not connect then its a PCM or chip issue (remove the chip if you have one & haven't removed it yet)

if the scantool connects AND you have >600ICP then look at the datastream for a RPM reading.

if the scantool picks up an RPM signal and it seems accurate....then the CPS is good.

If no RPM on the scantool, replace CPS.

If you have RPM (on scantool, not just on dash)...AND have ICP >600, then run an (key on, eng off) injector "buzz test"...

the buzz test is nothing more than a continuity test from the PCM, through the IDM, and to & from each injector solenoid.

LISTEN to each inj buzz....do they all sound the same? nice & crisp?

if the test passes (and you audibly heard them all)...then wiring is good, IDM is good, HPOP is good...CPS is good...then it could be a fuel issue. gasoline, water, etc...

I wouldn't mention it if I haven't seen it myself numerous times...

any chance this no start began with 10-20miles after a fillup?
 

·
Registered
Joined
·
26 Posts
Discussion Starter #2
7.3L Powerstroke Starting Requirements:
Battery voltage a minimum of 10.5 volts while cranking
RPM at least 100 while cranking. If no tach movement suspect CPS
If you have a scan tool ICP should be 500 PSI ± 25 PSI and fuel
pulse width should be 1 to 6 milliseconds.

The above requirements assume the following:

Correct oil level, oil type and pressure
Correct type of fuel
Correct fuel pressure (53 PSI per Ford spec)
Sufficient air supply (clean air filter & unobstructed intake)
Proper oil level in HPOP reservoir (1 to ¾ inch from top)
Proper glow plug relay and glow plug operation (in cold weather)
Proper injection timing (PCM controlled)
 

·
Registered
Joined
·
293 Posts
7.3L Powerstroke Starting Requirements:
Battery voltage a minimum of 10.5 volts while cranking
RPM at least 100 while cranking.If no tach movement on 2001 and older models suspect CPS
If you have a scan tool ICP should be 500 PSI ± 25 PSI and fuel
pulse width should be 1 to 6 milliseconds.

The above requirements assume the following:

Correct oil level, oil type and pressure
Correct type of fuel
Correct fuel pressure (53 PSI per Ford spec)
Sufficient air supply (clean air filter & unobstructed intake)
Proper oil level in HPOP reservoir (1 to ¾ inch from top)
Proper glow plug relay and glow plug operation (in cold weather)
Proper injection timing (PCM controlled)


Just want to add one correction, in red:smile:
 

·
Administrator
Joined
·
8,118 Posts
Just to add to that. If you have a mechanical odometer it will read rpm. Digital will not. They changed half way through 01.
 

·
Administrator
Joined
·
8,118 Posts
Done. It's a sticky now. Just for an FYI. Golfer (dave) is from swamps diesel.
 

·
Registered
Joined
·
293 Posts
Just to add to that. If you have a mechanical odometer it will read rpm. Digital will not. They changed half way through 01.
Never knew about a mid year change. Did they go to the VSM and the relocated fuse box on the later production 2001 trucks at the same time? And the hybrid electronic instrument cluster? I would assume it to be the whole package since the hybrid cluster works with the VSM.
 

·
Administrator
Joined
·
8,118 Posts
Yep to all questions.
 

·
Registered
Joined
·
8 Posts
I know this sticky is a couple months old but I think I've got a new one for you guys that I can't figure out on my own (and I work on these things everyday.) So im currently building a 95 7.3 with auto trans, the body's off a 92 frame and drive train are 95. Everything was swapped with no issues, installed the tee code pcm and ran into a no start. Flashing check engine light and will not perform a buzz test, my solus scanner goes through the motions to perform the test but it fails and apparently can't communicate with the injectors. That being said, every single sensor, icp, ipr, cps, ebp, oil temp, water temp, I mean this is a ground up rebuild and everythings new. And before you say it could be a bad sensor out of the box, here's the kicker, I plug in a Alf code pcm, which is for a manual opposed to automatic, check engine light is steady, solus communicates and performs buzz test with no problem,and truck fires and runs smoothly, and I can read everything to do with the automatic trans through the solus on a pcm that theoretically doesn't care about the auto. Any thoughts or personal experience is definitely appreciated.
 

·
Registered
Joined
·
3,676 Posts
Sounds like the TEE PCM is bad.

Sent from my SAMSUNG-SM-G935A using Tapatalk
 

·
Registered
Joined
·
3,676 Posts
But still only acts up in that truck?
Which TEE? and which ALF?
Should have a number at the end.

Sent from my SAMSUNG-SM-G935A using Tapatalk
 

·
Registered
Joined
·
8 Posts
TEE5 and ALF6 Ive also tried a TDE0 that was known to be good just the overdrive doesnt work, and it too will not perform a buzz test. Yes only in this truck, like i said its been tested in several other trucks and works great. ive been through the harness at least a dozen times looking for breaks or cuts and cant find any. this truck has been built from the ground up so ive touched every plug and bolt on this thing and cant find a reason for it to act like this. if i can figure out why the auto pcms wont allow a buzz test, ill be in good shape.
 

·
Registered
Joined
·
3,676 Posts
Could just be needing a couple wires switched around. Like at the firewall connector.

Sent from my SAMSUNG-SM-G935A using Tapatalk
 

·
Registered
Joined
·
8 Posts
Doubtful, it has decided to start running on the TEE5 PCM but with a flashing Check Engine Light, and as the harness went back in the same way it came out theres no way wires could have gotten mixed up
 

·
Registered
Joined
·
104 Posts
I'm also looking for a bit of help. I have a 2002 F250 7.3L with 120k on the clock. I was having issues with the truck idling funny when started from cold. This has now changed to where it does not want to start but after a lot of cranking.

- CELs - P0603, P1212, P1211

Just changed out the GPR and the glow plugs within the last 20k miles. Also changed my CPS to make sure it was not that. My ICP does have a ton of oil coming out of it. Think that is the issue? I'm at a loss.
 

·
Administrator
Joined
·
8,118 Posts
Change the icp first. You have two icp codes. Ford or international only. Cheap auto parts store ones suck.
 

·
Registered
Joined
·
104 Posts
Change the icp first. You have two icp codes. Ford or international only. Cheap auto parts store ones suck.
The codes only logged once the truck died on the road. It started off as a blip when it was warming up. Now it has gotten worse. Any chance it's a TPS?
 

·
Administrator
Joined
·
8,118 Posts
Nope. Oil in the icp. Means it's bad. They are only like $140.
 
1 - 20 of 33 Posts
Top