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Crank position sensor



Ok after a few hrs,got the sensor in and still not rpm hand movement,what else is there to try,I'm ready to give up on it
 
94grandprix said:
Ok after a few hrs,got the sensor in and still not rpm hand movement,what else is there to try,I'm ready to give up on it
Click to expand...
Just to be clear and forgive me if repeating, can your restate your symptoms and what you have done? Are you talking about the RPM gauge not working? Does it start and run? Does it suddenly die?
 
Ok when it first did what it did it was skipping like it was running out of gas,it had a quarter tank in it,waited a hr on a tow truck so while I was sitting there it cooled down and started but still got a tow,then after that sometimes it would start then times it wouldn't, so I'm not 100% sure if it fixed that part
 
Yes runs and drives perfect but I let it sit and idle in the yard one day before the new sensor and about after 30 mins in died
 


94grandprix said:
Ok after a few hrs,got the sensor in and still not rpm hand movement,what else is there to try,I'm ready to give up on it
Click to expand...

94grandprix said:
Ok when it first did what it did it was skipping like it was running out of gas,it had a quarter tank in it,waited a hr on a tow truck so while I was sitting there it cooled down and started but still got a tow,then after that sometimes it would start then times it wouldn't, so I'm not 100% sure if it fixed that part
Click to expand...

94grandprix said:
Yes runs and drives perfect but I let it sit and idle in the yard one day before the new sensor and about after 30 mins in died
Click to expand...

Let me see if I have this right, the problem you are having now is the car runs, but the RPM is not working. The problem before is the car would die. Seems to me, if the car is running it is not CPS. When/if your car is running then die, then starts that does sound like a CPS. If I am hearing right, since you replace the CPS your have not had the dieing issue, maybe not long enough to say fix, but so far so good.

So your CPS may have been bad. Until it dies again, lets just say it was bad and now you fixed that issue. Assuming a bad CPS, when the old one was on and the car was running did the RPM work? Do you have access to someone who can read your ODBII while the engine is running, if so what does it's RPM say? I guessing that if the computer did not see any RPM you would get a code at best or it would shut down the engine thinking there is an issue. I wonder it you don't have a wire issue behind the dash? Bad Ground? Bad Gauge? Any other gauges with issues?

Does any of this sound right?
 
Nope before the rpm didn't work,the obd scanner shows rpm,but somebody soldered a while wire with black stripe coming out of the icm to 2 wires,and a paper clip shoved beside my baby blue wire,I think somewhere in there may be my rpm problem,I've had the car for a year and have never had problems,I don't think gm would solder wires like that do you?
 
My rpm seems to have power just no signal,when you turn any Grand Prix over but not crank the rpm bounces a hair,mine does or both of mine do
 
I should have did it while I changed the sensor but didn't and know it's leaking

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May want to replace your ICM wiring harness that runs from the ICM to your crank and cam position sensor. Seen them cause all sorts of issues due to age and getting brittle/stiff with the wire inside having hich resistance
 
I've done got the seal and stuff on it, but I can unplug it with the balancer on

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