CrankShaft Sensor Problem

[Kmitchener]

I have made some serious headway since my last post, truck runs, shifts and drives. Now im getting crankshaft sensor error and top dead center position error. The truck starts well, but misses and puffs white smoke with the sensor plugged in, if i unplug the sensor it starts hard (10 seconds of cranking). But it runs well and sounds strong, my question is, sensor totally junk? Somehow off of time?

PS doing signature tonight once I get inside,
95 GMC Suburban 6.5 Turbo, PMD relocator is really the only current mod

 

[vegtech]

sounds like optic sensor to me

 

[Kmitchener]

That has something todo with the injector pump correct? Is it adjustable or possibly just junk?

 

[Big T]

Change the crank position sensor.

 

[buddy]

Have you messed with the CPS recently, or installed the timing cover recently? Is this an update to an older thread?

Long crank is normal with CPS unplugged, and it will run in backup fuel mode and high idle with CPS unplugged. The OS is the other timing source, its on top of the IP, the truck needs one of them to even start fuel injection.

The CPS can be installed incorrectly if you have done it in recent past.

 

[Kmitchener]

No I have never had it removed or the OS, other thread was about transmission which I have fixed, is there a way to re-time them together? it really seems as its just off time, idles good but misses horribly upon acceleration, can someone please describe the OS, i know its on the IP, is it the tube running verticaly with the 2 wires and a hex head on top?

 

[bison]

Look in my tread "DS4 IP rebuild time"

 

[WarWagon]

The CPS isn't all that expensive, is in a brittle plastic case and is known to fail once and awhile. It is also magnetized and can foul itself on metal shavings.

Pull the dipstick and "feel" the oil. Possible engine failure dumping metal in the oil.

It is a big job to change the CPS and set your mind to drilling and tapping it with a screw to remove it - it isn't going to come out without a fight. It is rough even with the timing cover off the engine!

Before doing that I would remove the "filter harness" and see if that helps.

 

[Big T]

The CPS isn't all that expensive, is in a brittle plastic case and is known to fail once and awhile. It is also magnetized and can foul itself on metal shavings.

Pull the dipstick and "feel" the oil. Possible engine failure dumping metal in the oil.

It is a big job to change the CPS and set your mind to drilling and tapping it with a screw to remove it - it isn't going to come out without a fight. It is rough even with the timing cover off the engine!

Before doing that I would remove the "filter harness" and see if that helps.

X2 on everything said here with the exception on difficulty in removing the CPS. Then again, I'm coming from a vast amount of experience with the darn things.:hihi:

 

[WarWagon]

X2 on everything said here with the exception on difficulty in removing the CPS. Then again, I'm coming from a vast amount of experience with the darn things.:hihi:

:skep: So I sugar coat things sometimes...

 

[bison]

:skep: So I sugar coat things sometimes...

I never had no trouble getting the CPS out either.....yet.
You got to pry on both sides at the same time.