08 Grand Prix Crank and cam sensor fiasco please help
03-17-2019, 11:07 AM
#61
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The way these calipers work for parking is the piston has a nut on the inside and the parking brake lever turns a screw that interacts with the nut. This will pull the caliper and cause the pads to grip the rotor. The piston also contains a self adjusting mechanism for the parking brake. I've rebuilt these before but it don't seem you can get a kit today. New looks like the only way to go.
Well when it rains it pours. My service lit PC is on the fritz. Let'* see if one of the other guys can give us the wiring diagrams and flow charts for your codes.
Before that though I would use a scan tool and do the relearn. Some of these just will not clear without doing the relearn with the scan tool. In my experience it requires the tool more times than not. You can spend many hours and trying new parts and will not work until the scan tool is used to do the relearn.
Before that though I would use a scan tool and do the relearn. Some of these just will not clear without doing the relearn with the scan tool. In my experience it requires the tool more times than not. You can spend many hours and trying new parts and will not work until the scan tool is used to do the relearn.
03-17-2019, 11:16 AM
#62
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BTW I remember these codes setting at the same time usually ended up being the ICM rather than it being either cam or crank sensor problems. Another thing, the relearn you were performing was for idle relearn and not crank. I talked to the guy that bought my shop when I retired and he told me that you MUST use the scan tool to do the relearn after replacing the crank sensor.
03-17-2019, 11:48 AM
#63
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@CathedralCub and @carfixer007 So I have an update. Some good some not so good I succesfully replaced the entire caliper and associated components and I replaced the entire parking brake system. I blead the brakes and toped off the brake fluid. Some of the parking brake components mainly the turnbuckle that connectes the main brake line and the right and left side was a pain b/c it was so rusted and the autoparts stores didn't sell it so I had to deal with it. I removed it and soaked it in vinigar for a couple days until I could get it all apart. Then I cleaned it up and reinstalled it. That works great as far as I can tell.
The bad news is when I went out to start the car it wouldn't start
This is the first time it wouldn't start. My daughter left it really low on gas so I figured having the back jacked up for a week may have caused the little amount of gas to flow into the wrong spot so I put a couple of gallons in it and it still won't start. I don't get any new codes but its really not running so I dind't expect any. It turns over maybe sputters a little but never gets close to starting. After trying to start it a few times the battery dies and that is it. I have it hooked up to a battery charger now and Carfixer mentioned earlier the ICM so I was going to follow the instructions int his article I found and try to diagnose the problem.
https://easyautodiagnostics.com/gm/3...-sensor-test-1
Anyone else have any other thoughts or reconmendations. It appears that it wasn't the crank or cam sensors
Thanks
I succesfully replaced the entire caliper and associated components and I replaced the entire parking brake system. I blead the brakes and toped off the brake fluid. Some of the parking brake components mainly the turnbuckle that connectes the main brake line and the right and left side was a pain b/c it was so rusted and the autoparts stores didn't sell it so I had to deal with it. I removed it and soaked it in vinigar for a couple days until I could get it all apart. Then I cleaned it up and reinstalled it. That works great as far as I can tell. The bad news is when I went out to start the car it wouldn't start
This is the first time it wouldn't start. My daughter left it really low on gas so I figured having the back jacked up for a week may have caused the little amount of gas to flow into the wrong spot so I put a couple of gallons in it and it still won't start. I don't get any new codes but its really not running so I dind't expect any. It turns over maybe sputters a little but never gets close to starting. After trying to start it a few times the battery dies and that is it. I have it hooked up to a battery charger now and Carfixer mentioned earlier the ICM so I was going to follow the instructions int his article I found and try to diagnose the problem. https://easyautodiagnostics.com/gm/3...-sensor-test-1
Anyone else have any other thoughts or reconmendations. It appears that it wasn't the crank or cam sensors
Thanks
03-17-2019, 12:17 PM
#64
Retired
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Verify fuel pressure.
03-17-2019, 12:42 PM
#66
Senior Member
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I think I lost my service lit as I paid the flat rate with no support or updates. If they can get the PC fixed I'll be without service literature from 2001 to 2010.
I'm not sure the ignition system you have is the same as your video. If you have the coils on top of the ICM you'll be OK with that.
As for the learning there are two things. One is the idle relearn which you CAN do without a scan tool and it requires you to block the wheels and engage the parking brake. The other is the crank relearn which you CAN'T do without a scan tool and does NOT require using the parking brake or blocking the wheels.
As Mike said, make sure you have good fuel pressure.
I'm not sure the ignition system you have is the same as your video. If you have the coils on top of the ICM you'll be OK with that.
As for the learning there are two things. One is the idle relearn which you CAN do without a scan tool and it requires you to block the wheels and engage the parking brake. The other is the crank relearn which you CAN'T do without a scan tool and does NOT require using the parking brake or blocking the wheels.
As Mike said, make sure you have good fuel pressure.
03-17-2019, 12:52 PM
#67
Retired
Certified Car Nut
On your fuel rail, you should have a schrader type of valve to connect a fuel pressure gauge. You can get one from Autozone pretty cheap.
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greentsarfish03 (03-17-2019)
03-17-2019, 01:51 PM
#70
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Ok sorry once I looked testing the fuel presure was really easy 60PSI so that apears not to be the problem. Where to next ? ICM or coil pack?
60PSI so that apears not to be the problem. Where to next ? ICM or coil pack?