Crank sensor? Timing chain - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-19-2005, 12:16 AM   #1
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Default Crank sensor? Timing chain

Hello, I pressed a button that said new topic, I doubt it is.

Here is how it all started..... This is my fiance'* car. The upper tensioner pully siezed up and the belt burned but didn't brake. It melted and shreaded... therefore, bits and pieces of the belt were wrapped around the AC and crank pullies and the car over heated. The next day, I drove it to our shop before I realized there were still bits of belt around the crank...(I think their all out now). I replaced the belt and pully. The car still ran like poo and I searched the poo out of this forum. It had serious signs of needing a CAT, so I did that. It'* better but still a continuing loss of power (it seems to be getting worse) and backfiring. The SC is fine and the lower tensioner pully is badlly worn...next to go.. it hops when the engine is reved. I think the thrown belt damaged the crank sensor. Any thoughts? How can I tell? Thanks.

The car is a 94 ssei 175K timing chain has never replaced.....just about every thing else has balancer, coils, wires, regular maintnance, etc. by future in-laws.
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Old 08-19-2005, 02:18 AM   #2
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At 175, a timing chain would certainly restore some lost power. Possibly 5-10 horsepower. As far as damage to the crank sensor, I think it'* far more likely that shredded belt damaged the WIRING harness to the crank sensor, or even perhaps loaded itself up in the interruptor rings of the harmonic balancer/dampener (the notches in the rings are 'read' by the sensor).
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Old 08-19-2005, 04:44 AM   #3
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When I replaced the timing chain on my bonnie, I accidentally put the crank sensor in wrong so that the teeth on the back of the balancer were hitting the crank sensor. This resulted in backfiring like you said was happening, and was very hard to start. As Willwren said, there may be some rubber built up in your sensor, or balancer teeth. I cant say I noticed any power increase, although that would've been nice. :(
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Old 08-27-2005, 11:31 AM   #4
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It'* back! Hooked it up to a computer that said it was the cam shaft sensor, but it was actually the sensor wires. The trown belt ripped all the plastic coating off the wires and tangled them together. After cleaning the rubber off and rewrapping them, the car runs great. Now onto other lights and problems. Thanks for the help.
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Old 08-27-2005, 11:36 AM   #5
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glad to hear that she is running again
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Old 08-27-2005, 12:37 PM   #6
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Default Re: willwren was right

Quote:
Originally Posted by WendysGirl
It'* back! Hooked it up to a computer that said it was the cam shaft sensor, but it was actually the sensor wires. The trown belt ripped all the plastic coating off the wires and tangled them together. After cleaning the rubber off and rewrapping them, the car runs great. Now onto other lights and problems. Thanks for the help.
Make sure that you heat shrink and know that there'* a good connection there and sealed. So you don't get any corossion up in there.
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