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Im not where i can get to a computer, turkey hunting and at camp for another week or so, but if memory serves the icp is part of the 5 volt reference circuit. Need a wire print and check for continuity from icp to pcm, check for 5 volt reference signal, and check all wires for short to each other or to ground.
does icp plug have oil in it? I believe you said you replaced icp sensor. Did you see the 2600 psi before you replaced it and after?
Try unplugging the ICP and see if it will start. Just to rule out a defective ICP sensor.
If it still does not start, we'll assume ICP is good, and IPR is climbing because we're not getting fuel. As has been suggested, see if you can get a fuel pressure measurement.
Does the truck have a chip? P0605 might just be from the performance chip.
What does FIPW (AE) or FUELPW (FORScan) read when cranking? Should be at least 0.6ms if PCM/IDM are in sync.
What is your cranking RPM and cranking voltage?
I get the same icp pressure with icp plugged and unplugged no change. Cranking rpm is 160/280. Icp volts are 2.8- 3.4
[QUOTE=powerstrokeN1;19822494]I dont think its chipped but It might have used to been. I need to check on that and check fuel pressure.
are all chips adjustable like the ts6 with an adjusting **** or are some just programmed and no adjustments bc there is no adjusting **** like on my 97 obs with a ts6
Im not where i can get to a computer, turkey hunting and at camp for another week or so, but if memory serves the icp is part of the 5 volt reference circuit. Need a wire print and check for continuity from icp to pcm, check for 5 volt reference signal, and check all wires for short to each other or to ground.
does icp plug have oil in it? I believe you said you replaced icp sensor. Did you see the 2600 psi before you replaced it and after?
I don't know what the icp pressure was prior to putting the new icp in. I didn't have AE yet. I'm going to need some fine details on testing those wires. That is not.my strong suit but I can be taught and I do have a Klein volt meter.
The icp wiring goes through the 42 pin connector. Have you checked the bottom of the 42 pin connector harness for rubbing through where it crosses over the driver side valve cover. We have seen that before.
if your old icp was not full of oil then you may want to put it back in and see if the numbers you're seeing change. I realize you installed a new OEM Icp but even new parts can be bad
I don't know what the icp pressure was prior to putting the new icp in. I didn't have AE yet. I'm going to need some fine details on testing those wires. That is not.my strong suit but I can be taught and I do have a Klein volt meter.
I'll get a gauge and check fuel.pressure in the mean time. I'm actually headed to Columbia Sc on Saturday so itll probably be a few days. I greatly appreciate your time man. You are awesome. Sounds to me.like.its about time for me and you to hit the sack for.the night. Good luck on the hunt.
I don't know what the icp pressure was prior to putting the new icp in. I didn't have AE yet. I'm going to need some fine details on testing those wires. That is not.my strong suit but I can be taught and I do have a Klein volt meter.
I'll be glad to help with wire testing best i can from my phone if we get to that point. Should be fairly easy to test the part of the harness from icp to 42 pin connector. May someone at a computer to help us with wire prints. @Sous may be able when we need it.
Just because the fuel is disappearing out of your can doesn’t mean you have pressure. The FRP is always bleeding the excess pressure by allowing the fuel to bypass flow back to the tank. If the FPR isn’t holding pressure then all your fuel is just pumping to the tank.
I’m not the best with all the numbers and sensors but having the same ICP value with the connector plugged and unplugged doesn’t sound right to me.
I'll get a gauge and check fuel.pressure in the mean time. I'm actually headed to Columbia Sc on Saturday so itll probably be a few days. I greatly appreciate your time man. You are awesome. Sounds to me.like.its about time for me and you to hit the sack for.the night. Good luck on the hunt.
i love this sight because there are lots of great people here who jump at the chance to help. I have received my fair share for sure. We'll get you running again.
I'll get a gauge and check fuel.pressure in the mean time. I'm actually headed to Columbia Sc on Saturday so itll probably be a few days. I greatly appreciate your time man. You are awesome. Sounds to me.like.its about time for me and you to hit the sack for.the night. Good luck on the hunt.
I was just in Columbia twice last month. Hopefully the pollan has eased up a bit.
Originally Posted by AllaboutMPG
I'll be glad to help with wire testing best i can from my phone if we get to that point. Should be fairly easy to test the part of the harness from icp to 42 pin connector. May someone at a computer to help us with wire prints. @Sous may be able when we need it.
I am absolutely willing to help out when needed. Thanks for tagging me Paul and bringing this thread onto my radar.
If remembering correctly koeo the 3 wire sensors should have 12v to one wire, 5v, to another, and a ground. 2 wire sensors just have the 5v and ground. Double check me cause it's quarter after 2 a.m. here and I just got back from a work call out, so I'm not firing on all cylinders. Might need a shot of Diesel Kleen and a hot torque.
My money is on something odd going on with the HP oil circuit be it a bad ICP sensor, bad ICP sensor pigtail or bad HPOP itself. Your testing will provide the data needed to make that determination. I'll dive deeper into the DTCs in the shop manual.
EDIT:
Shop Manual DTC Descriptions
P0605: Internal Control Module ROM Error
P0475: Exhaust Pressure Control Valve Malfunction
P1118: Manifold Air Temperature Sensor Low Input
My remarks
As mentioned, above, the P0605 could be because of a chip.
Do you have an EBPV delete pedestal? That could cause the P0475.
The P1118 could be a bad sensor. However with all the issues around various sensors that have wires passing through that part of the harness, part of me wants to say you had a mouse in the valley chewing on stuff.
In any case, have you tried clearing DTCs to see which ones come back? I'm surprised you don't have P1209, P1210, P1211 or P1212 DTCs with the behavior we are seeing from your HP oil system.
I'll be glad to help with wire testing best i can from my phone if we get to that point. Should be fairly easy to test the part of the harness from icp to 42 pin connector. May someone at a computer to help us with wire prints. @Sous may be able when we need it.
Ok I had about 10 min. Today and put a meter in the icp pigtail and got the 5v on 1 prong and zero on both of the other prongs which I should have 12v 5v and ground. Now my ? Is how do I test the icp pigtail where it leaves the 42pin connector? Basically if we have correct reading at the 42pin it would be in the wires from there to the icp pigtail correct? If we don't have a good reading on the 42pin then I'll be chasing the issue between the pcm and the 42pin? Weird Something looks weird to me. Its looks like 3 wires coming out of 1. Has someone else done this or is this OEM the way it came?
Be careful with that, those look a little "Melded" to me, actually, That whole bundle right there looks toasty, don't pull anything apart until you're ready to start patching right away...… I suggest going and getting a bottle of liquid tape before you separate any of those wires...…
and a roll of 3M 33 at the ready also for that matter.
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