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Old 11-29-2013, 04:46 PM
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Won't start/ only runs when in 'start' position

Hey ya'll
I come bearing another issue...
Earlier it was about 35*F and I tried starting. Heater wasn't plugged in either. Usually it starts fine, maybe a little rough. But anyway, I cranked for about 4-5 seconds Nothing just smoke. I tried again and it was trying to turn over and finally did but i had to continue with the key in the start position so the starter was basically keeping the engine running, also it ran like complete crap obviously. So my question is.....CPS?? I kinda thought GPR but that doesn't sound likely because it did in fact try to start. I got the heater plugged in tonight and I'll try her again in the morning just to try and isolate the issue further. I should also throw in the fact that when it did crank, it wasn't slow or anything, sounded like normal. My volt idiot gauge did drop down to about 8-10 thought but it definitely had the cranking amps.
Thank's in advance guys!
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Old 11-29-2013, 08:13 PM
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Just a thought, would it be possible my ICP could give me this problem? It does have oil in the sensor....
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Old 11-30-2013, 04:39 AM
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Anyone have any ideas??
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Old 11-30-2013, 05:22 AM
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I would test the gp and gpr. From what i have read the icp is bad if it has oil in it, unplug it and it should go into a factory preset mode.
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Old 11-30-2013, 05:25 AM
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If I unplug it, shouldn't it throw a code?
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Old 11-30-2013, 06:23 AM
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Unplugging it Will throw a code because the PCM doesn't see any reading from it. It then substitutes a default pressure for the IPR to use (limp mode).

BUT, all the oil in the connector tells you is the internal seal on the ICP might be failing. It doesn't mean the ICP isn't still functioning just fine.

Do you now have an SES light (before trying to unplug it) ? Your problem doesn't make me think of ICP first though, could be of course, but there more likely causes first. Codes might help now...

See if plugging-in cures it, if so the whole Glow Plug system (plugs/relay/connections) are most likely the problem.

Also, on a side note, if you actually hit 8v (depending on the PCMs programming, and an '01 might go either way) it may not start based on that alone. The PCM has certain criteria it needs to see and too low voltage can cause it Not to trigger the IDM to fire the injectors.
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Old 11-30-2013, 07:36 AM
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Ok thanks for the good insight. I didn't unplug the ICP but it did start after the block heater was plugged in and it started right up. how can I test my GPR/ plugs?
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Old 11-30-2013, 07:50 AM
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All spelled out nicely here -> Troubleshooting GPR & GP's
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Old 11-30-2013, 08:24 AM
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Good deal thanks
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