NO WAY!!!!!
Senior User
Joined: Jan 2000
Posts: 163
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From: Thunder Bay, Canada
How about checking your IPR harness? Fuel leaks in the area have been known to eat away at the wire insulation, or maybe just as simple as the little stamped steel nut has backed off, so the solenoid no longer gets it's power.
FWIW - both my truck's (95 and 96) tach have never really moved at all while i am cranking it over to start, so i've never really used that solely for diagnosis of a bad CPS.
FWIW - both my truck's (95 and 96) tach have never really moved at all while i am cranking it over to start, so i've never really used that solely for diagnosis of a bad CPS.
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
I got the 5v 12v but 0 ohms??? Any one know what the light blue wire goes to?
Postmaster
Joined: Sep 2007
Posts: 4,195
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From: Medford Oregon
If you mean (zero) ohms like the probes are shorted then you are OK.
If you mean (infinity) ohms like the probes are not shorted then the wire is bad somewhere.
Spec is 5 ohms or less.
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From: Long Island, NY
Yea i am good. Got a solid ground. Any suggestions on what my next move should be?
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
How about checking your IPR harness? Fuel leaks in the area have been known to eat away at the wire insulation, or maybe just as simple as the little stamped steel nut has backed off, so the solenoid no longer gets it's power.
FWIW - both my truck's (95 and 96) tach have never really moved at all while i am cranking it over to start, so i've never really used that solely for diagnosis of a bad CPS.
FWIW - both my truck's (95 and 96) tach have never really moved at all while i am cranking it over to start, so i've never really used that solely for diagnosis of a bad CPS.
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
ICP needs to report 500PSI and CPS needs to report at least 100 RPM cold to start. If CPS is not working IPR will never command over 400PSI.
Try unplugging the ICP sensor and start.
This will force the PCM to command the IPR to output 750PSI if CPS and IPR are working correctly.
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
Spec Shows ...
ICP needs to report 500PSI and CPS needs to report at least 100 RPM cold to start. If CPS is not working IPR will never command over 400PSI.
Try unplugging the ICP sensor and start.
This will force the PCM to command the IPR to output 750PSI if CPS and IPR are working correctly.
ICP needs to report 500PSI and CPS needs to report at least 100 RPM cold to start. If CPS is not working IPR will never command over 400PSI.
Try unplugging the ICP sensor and start.
This will force the PCM to command the IPR to output 750PSI if CPS and IPR are working correctly.
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Postmaster
Joined: Sep 2007
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From: Medford Oregon
Thread Starter
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
Spec Shows ...
ICP needs to report 500PSI and CPS needs to report at least 100 RPM cold to start. If CPS is not working IPR will never command over 400PSI.
Try unplugging the ICP sensor and start.
This will force the PCM to command the IPR to output 750PSI if CPS and IPR are working correctly.
ICP needs to report 500PSI and CPS needs to report at least 100 RPM cold to start. If CPS is not working IPR will never command over 400PSI.
Try unplugging the ICP sensor and start.
This will force the PCM to command the IPR to output 750PSI if CPS and IPR are working correctly.
No good. We looked at the CPS and it seems ok. I just unplugged the ICP and still wont start. Fuel pressure at cranking is 55. I would like to look at the IPR and IDM when I get home from work so If any one can give me some Info on how to test them I would be grateful. I don't have a pressure gauge to test HPO so I was thinking of loosing one of the nuts on the HPX and see if oil blasts out just to get a clue as to what the heck is going on. will report back. Thanks
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
have you tried putting in another CPS just for fun?? which CPS are you getting? if your getting the light grey one i could see it going out all the time... did you check the HPOP rez level? can you get a scanner to see what the ICP and IPR duty cycle % is????
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
The CPS I had to put in about five wees ago was black and made by standard. I just put a ford one in the other day. Think it was black but I am freaking colour blind so I will have to look into that. I didnt check HPOP res but will do when I get home from work. And no scanner just a edge evo code reader. Gota get back to work so Ill catch up with you all at around 4:30 and let you know what I find.
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
I had the edge for over a year now and IIRC it is when you first try to load programs into the pcm is when things go bad.
Hey Strokin, you da man! I pulled the plug off the HPOP rez and stuck a screwdriver in there and the oil level was just over 2 inches below the top of the pump. I dumped about a quart of oil in it and the son a bee started right up. IIRC there is a check valve that is supposed to keep the oil in the rez but i am not sure where it is. Or is it the IPR that keeps the level up?
