Slow acceleration
#1
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Slow acceleration
I'm experiencing very slow acceleration from stop. Started happening about a little over a week ago. It'* at the point where I could hear the engine revving and I wasn't moving so I thought my wheels were just spinning on ice. I think it hits near 3K RPMs before I actually start moving. Also, if I let off the brake while idling it hardly moves forward if at all, not like it should while in drive.
Brand new plugs and wires. Coils, ICM tested good. New crank sensor. LIM UIM gaskets replaced recently.
I do have a lot of exhaust escaping from the rear exhaust manifold behind the engine. Definitely need a new donut gasket. Would this cause slow acceleration though?
Brand new plugs and wires. Coils, ICM tested good. New crank sensor. LIM UIM gaskets replaced recently.
I do have a lot of exhaust escaping from the rear exhaust manifold behind the engine. Definitely need a new donut gasket. Would this cause slow acceleration though?
Last edited by kparrent; 01-05-2010 at 03:55 PM.
#3
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I'm leaning towards trans if I am reading you correctly. Check your fluid level after a complete warmup on level ground. Also smell the trans oil. Does it smell burnt? Is it brown or reddish?
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2002 *-10 5.7 V8
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2011 Chevrolet Tahoe PPV
#4
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Sounds like a torque converter getting ready to vacate the car. There is a cleaner and conditioner available for some parts stores, I picked up some from Canadian Tire. One bottle is a cleaner, the other is a conditioner. Dump the conditioner in the tranny, take her out for a spin. Bring it home, dump the tranny pan, change filter and inspect the magnet in the pan. Lots of metallic pieces is not good. Bolt the pan back up and fill it to the full mark with the conditioner added. Keep in mind that tranny fluid is checked with engine running and on parked on flat surface. Some valving may be stuck and this may help. If it is a torque converter it is going to be a tranny rebuild.
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Sounds like a torque converter getting ready to vacate the car. There is a cleaner and conditioner available for some parts stores, I picked up some from Canadian Tire. One bottle is a cleaner, the other is a conditioner. Dump the conditioner in the tranny, take her out for a spin. Bring it home, dump the tranny pan, change filter and inspect the magnet in the pan. Lots of metallic pieces is not good. Bolt the pan back up and fill it to the full mark with the conditioner added. Keep in mind that tranny fluid is checked with engine running and on parked on flat surface. Some valving may be stuck and this may help. If it is a torque converter it is going to be a tranny rebuild.
My initial thought was tranny as well, but it seemed to come up at the same time as all my electrical issues. I have another thread on those here https://www.gmforum.com/1992-1999-91/fuses-286899/ .
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Issue was resolved by rewiring driver'* side beneath the dash.
See:
https://www.gmforum.com/showthread.php?t=286899
See:
https://www.gmforum.com/showthread.php?t=286899
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