2002 crank no start
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5th Wheeling
Joined: Feb 2002
Posts: 26
Likes: 13
From: BR US
2002 crank no start
Trying to figure out nephews 02 for him.
it won’t crank most times but will randomly start according to him.
I got it to my house and found the ecm fuse blown. Also replaced the China cps with a new international one. Cranked it and I drove it for a few days with no issues. Then again crank/ no start.
The icp has been swapped a couple times as well as several cps in the recent past- all before I got hands on it.
current state is it gets around 180 injector pressure (obviously not enough). Unplug the icp and it reads 2400+ but still wont start. I use a snap on solid ultra to read it. It shows 180 or so rpm when cranking over, battery voltage is good.
I am leaning toward ipr but don’t want to just throw parts at it especially with ipr being not cheap.
it does have a hydra tuner on it.
talking to him a bit deeper on the history, this all started after an oil change that may have been overdue by a looong time- he said maybe 25k before the oil change.
when it ran for that few days for me, it ran great, started on 40 degree mornings just fine and then nothing.
Am i missing anything?
it won’t crank most times but will randomly start according to him.
I got it to my house and found the ecm fuse blown. Also replaced the China cps with a new international one. Cranked it and I drove it for a few days with no issues. Then again crank/ no start.
The icp has been swapped a couple times as well as several cps in the recent past- all before I got hands on it.
current state is it gets around 180 injector pressure (obviously not enough). Unplug the icp and it reads 2400+ but still wont start. I use a snap on solid ultra to read it. It shows 180 or so rpm when cranking over, battery voltage is good.
I am leaning toward ipr but don’t want to just throw parts at it especially with ipr being not cheap.
it does have a hydra tuner on it.
talking to him a bit deeper on the history, this all started after an oil change that may have been overdue by a looong time- he said maybe 25k before the oil change.
when it ran for that few days for me, it ran great, started on 40 degree mornings just fine and then nothing.
Am i missing anything?
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Unwrap the loom for the IPR valve connector. Go back 6-8 inches looking for signs of gooification(I'm trying to get Webster to add it to the book). It's pretty common to see intermittent short from the IPR caused by bad wiring.
Lead Driver
Joined: Jun 2004
Posts: 6,366
Likes: 595
From: Amarillo, TEXAS!
Watching ICP psi isn't very useful for diagnostics. As you just found out, if the ICP sensor reading is untrusted by the PCM, it will use and report an inferred value. Monitor ICP voltage. KOEO should be approx 0.24 volts. Cranking needs to be 0.84 volts or greater for the engine to start.
Cross-Country
Joined: Nov 2022
Posts: 54
Likes: 14
From: Elk River, MN
Mine was a crank no start - I would get differing readings from ForSCAN. Sometimes it was IPR DC 64% and 300 psi ICP, and next time it was 14% and 2400psi respectively. I put a 5000psi gauge on the ICP port using an old HPOP line and some STC fittings from RiffRaff to test actual ICP pressure. Turns out IPR was indeed bad, and the faulty readings on ForSCAN were caused by corrosion on the back of the fuse block from a leaky windshield.
Thread Starter
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5th Wheeling
Joined: Feb 2002
Posts: 26
Likes: 13
From: BR US
Fuel tank level just under half. I drove it to work and back and parked it and it hasn’t started since.
ICP voltage KOEO is .26v, press regulator % is 15, when cranking I get .51v and % is 90
i am now getting a code 1212 for ink pressure not at expected
ICP voltage KOEO is .26v, press regulator % is 15, when cranking I get .51v and % is 90
i am now getting a code 1212 for ink pressure not at expected
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Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
The IPR DC% PID only shows what the PCM is asking for doesn't tell you if the message was received or acted upon. Check the wires clean the valve.
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Thread Starter
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5th Wheeling
Joined: Feb 2002
Posts: 26
Likes: 13
From: BR US
It’s been below freezing so I havnt messed with it since posting last.
exm fuse was blown when I got hands on it, replaced it and hasn’t blown again. No idea why it blew. I suspected bowl heater but no issues with fuse blowing since I replaced it.
when it warms up a bit, I’m going to pull the ipr and go from there.
exm fuse was blown when I got hands on it, replaced it and hasn’t blown again. No idea why it blew. I suspected bowl heater but no issues with fuse blowing since I replaced it.
when it warms up a bit, I’m going to pull the ipr and go from there.
Thread Starter
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5th Wheeling
Joined: Feb 2002
Posts: 26
Likes: 13
From: BR US
Watching ICP psi isn't very useful for diagnostics. As you just found out, if the ICP sensor reading is untrusted by the PCM, it will use and report an inferred value. Monitor ICP voltage. KOEO should be approx 0.24 volts. Cranking needs to be 0.84 volts or greater for the engine to start.
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
If you're not getting any voltage reading from the ICP with koeo then it's either a ICP problem or a wiring problem.
Thread Starter
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5th Wheeling
Joined: Feb 2002
Posts: 26
Likes: 13
From: BR US
They are independent of each other so no. The ICP is nothing more than a pressure sensor. Actually it's a variable resistor that's value changes as pressure changes. The IPR is a solenoid actuated needle valve the PCM uses to control injection pressure. One is for collecting data the other for preforming work.
If you're not getting any voltage reading from the ICP with koeo then it's either a ICP problem or a wiring problem.
If you're not getting any voltage reading from the ICP with koeo then it's either a ICP problem or a wiring problem.
I took the ipr out and cleaned it to some extent but can say for sure it is functioning properly.