car jumps when i push gas in 1st gear - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-05-2005, 05:34 PM   #1
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Default car jumps when i push gas in 1st gear

Whenever I push the gas semi hard after I put the car in drive there is a jump that i can feel. I'm not sure if this is a tranny prob or maybe something with the fuel lines or pump.
Any body that has had this problem w/ a 1992 BONNEVILLE SSE pls help me diagnose
the problem so that I can fix it


1992 BONNEVILLE SSE
I CALL HER PEARL
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Old 09-05-2005, 06:00 PM   #2
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Does this only happen immediately after putting it in gear?
How long are you giving it after putting it in gear before you hit the gas?
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Old 09-05-2005, 06:28 PM   #3
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After I put it in gear i'll wait a few seconds and push the gas and it will always do it. If I ease on the gas It doesn't jump at all. It only happens when I initially put it in drive.
Thanks for your quick response
1992 BONNEVILLE SSE
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Old 09-05-2005, 06:47 PM   #4
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check your motor and tranny mounts... im betting they are cracked...

if not....its called TORQUE!
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Old 09-05-2005, 07:03 PM   #5
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Are there any test that I can do on the car to verify that'* the probl or do i just need to go to the professionals. the car does have 160,000 miles
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Old 09-05-2005, 07:12 PM   #6
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yes, look at the front mount... is it cracked?
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Old 09-05-2005, 07:36 PM   #7
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It doesn't seem cracked and the motor is still when car is running.
No matter how fast i go it wont jump unless i come to a stop and push the gas semi hard.
How expensive are the mounts to replace? It does sound like the jump is coming from around the tranny area. Is there a way to check the tranny mount?
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Old 09-06-2005, 08:46 AM   #8
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Ok, if with a visual inspection the mounts don't seem bad you can try one other thing. Get a helper (any person will do).

Raise the hood and start the car. Have helper stand off to the side of the car...say 5-10 feet away. Put the car in drive and with your left foot on the brake press the gas pedal a couple times..almost like a quick rev. If your helper says the motor jumped you have a bad motor mount.
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Old 09-06-2005, 11:09 AM   #9
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Lubricate the linkage at the top of the gas pedal inside the passenger compartment.

Worked for me.
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Old 09-06-2005, 04:37 PM   #10
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I did notice that when I push the gas while holding the brake pedal the engine is moving.
How many mounts does the engine have?
and how expensive are they to get fixed?
1992 BONNEVILLE SSE
160,000
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