94.5 randomly dies
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3rd Gear
Joined: Jun 2023
Posts: 3
Likes: 0
94.5 randomly dies
My 94.5 has started dying at random intervals while I'm driving. It usually takes 10-15 minutes before I can start it up again. I have replaced the fuel pump, CPS, and ICP.
From what I have been reading it looks like my next step is IPR, HPOP, or injector o rings. I've pulled the valve cover off and I'm not seeing anything obvious with the injectors.
Is there a simple way to test the ICP and HPOP with it sitting in the driveway before I drop the money on both? Or a way to tell for sure if it's an injector o ring issue?
Thanks in advance
From what I have been reading it looks like my next step is IPR, HPOP, or injector o rings. I've pulled the valve cover off and I'm not seeing anything obvious with the injectors.
Is there a simple way to test the ICP and HPOP with it sitting in the driveway before I drop the money on both? Or a way to tell for sure if it's an injector o ring issue?
Thanks in advance
Lead Driver
Joined: Apr 2016
Posts: 7,201
Likes: 1,340
From: Bahstun
need a scanner to read what the computer shows
When it happens, test fuel pressure and then try splashing some water on the IPR coil behind the HPOP
Under the VC when running, see if oil is seeping out at the base of injectors, should only be at the oil spouts if it is leaking at the base, then orings are shot
if your fuel filter is dark, orings on injectors are shot
if you remove wiring to ICP while running at idle and it stops then IPR isnt keeping up with the demand needed by leaks
When it happens, test fuel pressure and then try splashing some water on the IPR coil behind the HPOP
Under the VC when running, see if oil is seeping out at the base of injectors, should only be at the oil spouts if it is leaking at the base, then orings are shot
if your fuel filter is dark, orings on injectors are shot
if you remove wiring to ICP while running at idle and it stops then IPR isnt keeping up with the demand needed by leaks
Laughing Gas
Joined: Sep 2019
Posts: 797
Likes: 357
From: Arkansas
I always tell new members to... Get a scanner. The only ones I dont say that to are people with the 94.5-95 because I dont know the years that are truly OBD 2 compatible. Will a 94.5 ad a 95 just hook up to a diag tool or do they all require a flash to be OBD 2 compliant?
Laughing Gas
Joined: Sep 2019
Posts: 797
Likes: 357
From: Arkansas
If you are are going to be dedicated to repairing the truck and plan on keeping it, you could just buy a scan too and see if it connects. I dont tell people with 96 and below to buy a scan tool because I dont want them to come back and be angry that it wont connect. One way or the other if you plan on keeping the truck you will need the ability to connect a diag tool. If it connects the OBD2 compatibility update has been done and you are good to go. If it does not connect you can go from there and decide how to proceed.
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Tuned
Joined: Jan 2020
Posts: 338
Likes: 112
From: Southern California
If you are are going to be dedicated to repairing the truck and plan on keeping it, you could just buy a scan too and see if it connects. I dont tell people with 96 and below to buy a scan tool because I dont want them to come back and be angry that it wont connect. One way or the other if you plan on keeping the truck you will need the ability to connect a diag tool. If it connects the OBD2 compatibility update has been done and you are good to go. If it does not connect you can go from there and decide how to proceed.
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Lead Driver
Joined: Mar 2006
Posts: 5,104
Likes: 1,517
From: western SD
My 96 C&C truck would do this, and when I read the codes, it was for pressure above/below what was expected. Replaced the IPR and all was good.
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