1997 Ford F-250 7.3 5 speed manual won't start need help please! - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 19 (permalink) Old 08-29-2017, 01:53 AM Thread Starter
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1997 Ford F-250 7.3 5 speed manual won't start need help please!

Hey guys I have a 1997 ford 7.3 with a 5 speed and I swapped the motor out awhile back and now I have this issue that for the life of me I cannot figure out when I turn the key on I have no wait to start light and no check engine light and not tach movement so I thought ok it's the fuse but wrong it's good I have power to the pcm so I thought ok it's the pcm well my buddie just so happens to have a truck just like mine so I put my pcm on his truck and it fired right up along with my cps and my idm and I also discovered that when I back my pcm connector out some I get my wait to start light and my check engine light but still no tach movement I'm completely lost and I really need some ideas before I burn this stupid thing!!!!!
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post #2 of 19 (permalink) Old 08-30-2017, 10:56 PM
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Re: 1997 Ford F-250 7.3 5 speed manual won't start need help please!

No direct experience, but I've read that some 1997 trucks, the tach does not move while cranking. Must be something different in the PCM programming.

Is the CE light staying on when you turn the key to RUN, or does it just blink on once VERY quickly and then go off?
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post #3 of 19 (permalink) Old 08-31-2017, 04:43 AM Thread Starter
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My tach used to move while cranking and when I unscrew the pcm connector some and I get the lights to come on check engine light stays on and never goes off
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post #4 of 19 (permalink) Old 08-31-2017, 04:50 AM
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Re: 1997 Ford F-250 7.3 5 speed manual won't start need help please!

Have you hooked a scanner to it?

97 F350 cclb
7.3 5spd

95 f350 rclb 7.3

02 f350 ccsb 7.3
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post #5 of 19 (permalink) Old 08-31-2017, 05:55 AM Thread Starter
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Yes I have hooked a scanner it it and it throws all kinds of codes like over 200 every time and it's always the same ones it's like the pcm is just going crazy
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post #6 of 19 (permalink) Old 08-31-2017, 06:01 AM Thread Starter
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And also when I hooked my pcm to my buddies truck it didn't throw a single code and ran just fine but like I said I have to have the connector partially unhooked to get my wts light and my cel light to come on and even when I do it won't start
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post #7 of 19 (permalink) Old 08-31-2017, 01:44 PM
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Re: 1997 Ford F-250 7.3 5 speed manual won't start need help please!

What scanner are you using? Is it a scanner that you've determined is compatible with our generation of PSD? If it is, it should be able to do, or at least attempt, a buzz test.

If the over 200 codes include ones that only a gasser would throw, then the scanner is probably not compatible with our generation of PSD.

Option - try disconnecting ALL 5V VREF sensors, reconnect the PCM connector all the way, and see if you get a WTS light and try to scan it again.
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post #8 of 19 (permalink) Old 08-31-2017, 11:50 PM Thread Starter
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Yes I know it's compatible because I have used it before this happened and yes I can do a buzz test on the injectors I already have just to see and as for the sensor trick I have already tried that a couple of times
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post #9 of 19 (permalink) Old 09-08-2017, 01:53 AM Thread Starter
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Does anyone else have any more ideas please I'm really needing this truck back
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post #10 of 19 (permalink) Old 09-08-2017, 03:38 AM
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Re: 1997 Ford F-250 7.3 5 speed manual won't start need help please!

Any chance you have a chip installed?
You need to pull the pcm connector and look at the pins. Would be good to clean both sides.

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