Engine missing scanning with a snap-on need help
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Engine missing scanning with a snap-on need help
My truck has a miss, idle to about 1600-1700 rpm, I've got a new black cps and a new ICP from clay, neither makes a difference, ran the truck with the ICP unplugged and no difference. Now a good friend of mine has a snap-on tool that can look at the truck. I know we need to do a buzz test and cylinder contribution test, but what are we looking at to know if its a oring or bad IPR? Also the truck starts hard when its earned up. Any help is appreciated.
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From: Puget Sound
Lead Driver
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whats happening, when it is suspected to be the injectors, if the trucks' hard-starting when warm?
Reason i ask is, i have a on-off switch for my d2 pump. ..(for when im run'n wvo), either in dead cold mornings or after i just ran an hour on her, when i flip the ignition..(cold, when gpr-led goes out) WITH D2 pump switvh off...aka, no diesel flowing to injectors, my truck pops off with in 1/2 rotation of motor, BUT, if i HAVE switch on..(d2), it takes 2-4 seconds for motor to fire.
Reason i ask is, i have a on-off switch for my d2 pump. ..(for when im run'n wvo), either in dead cold mornings or after i just ran an hour on her, when i flip the ignition..(cold, when gpr-led goes out) WITH D2 pump switvh off...aka, no diesel flowing to injectors, my truck pops off with in 1/2 rotation of motor, BUT, if i HAVE switch on..(d2), it takes 2-4 seconds for motor to fire.
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Joined: Dec 2006
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From: Chattanooga, TN
My '02 also had a slight miss and after replacing the a wiring harness due to brittle insulation and the IPR the miss went away. The '02 has a lot of miles on it and the IPR had some fairly dirty oil in that small plunger assembly after I broke it apart.
Hard to point directly at a miss though.
Hard to point directly at a miss though.
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From: Puget Sound
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Hotshot
Joined: Jan 2011
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I would first ohm out the injectors... it could be as simple as a bad Under Valve Cover Harness.
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