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1991 3.1l firebird clunking and jerking

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Old 02-09-2013 | 03:12 PM
  #1  
Lonemerc's Avatar
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Joined: Sep 2011
Posts: 50
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Car: '82 Berlinetta/'91 Firebird
Engine: 5.0/3.1
1991 3.1l firebird clunking and jerking

Hi forums,

I have a 1991 3.1l v6 firebird. I have noticed that it begins to clunk and jerk when i try to accelerate from coasting at 90-100km/h(around 60mi/h). When im coasting at around 60mi/h the car is fine, but as soon as i give it a little gas the car jerks hard and makes a clunking noise in the rear. During this rough period the car does not accelerate, and continues to jerk until i take my foot off the gas. Also, i am not slamming on the gas to accelerate, i am lightly pressing down on it.

Any and all help is much appreciated.

Thanks!
Old 02-15-2013 | 09:21 PM
  #2  
Lonemerc's Avatar
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Junior Member
 
Joined: Sep 2011
Posts: 50
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Car: '82 Berlinetta/'91 Firebird
Engine: 5.0/3.1
Re: 1991 3.1l firebird clunking and jerking

Bump. Still looking for an answer
Old 03-27-2013 | 05:24 AM
  #3  
Rell_1218's Avatar
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Joined: Dec 2012
Posts: 35
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From: Marietta
Car: 1991 Chevy Camaro RS
Engine: V6 3.1L
Transmission: Auto
Axle/Gears: Stock
Re: 1991 3.1l firebird clunking and jerking

Originally Posted by Lonemerc
Hi forums,

I have a 1991 3.1l v6 firebird. I have noticed that it begins to clunk and jerk when i try to accelerate from coasting at 90-100km/h(around 60mi/h). When im coasting at around 60mi/h the car is fine, but as soon as i give it a little gas the car jerks hard and makes a clunking noise in the rear. During this rough period the car does not accelerate, and continues to jerk until i take my foot off the gas. Also, i am not slamming on the gas to accelerate, i am lightly pressing down on it.

Any and all help is much appreciated.

Thanks!
it could be the fuel pump
Old 03-27-2013 | 05:34 AM
  #4  
NCC-2569's Avatar
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10 Year Member
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Joined: Mar 2011
Posts: 517
Likes: 18
From: Germany
Car: 1990 Trans Am
Engine: 305 TPI
Transmission: Auto
Axle/Gears: Stock
Re: 1991 3.1l firebird clunking and jerking

There are rumors that this is due to torque converter clutch aging and gets worse over time.
I had the same issue, but sold the car before I had the time to look into it deeper.
It's just when you push the pedal down ever so slightly, right?
Could also be a maladjusted TPS. Check that first.
Old 04-02-2013 | 06:28 AM
  #5  
mcrandrz's Avatar
Member
 
Joined: Feb 2013
Posts: 226
Likes: 1
Car: 1991 camaro rs
Engine: 3.1 - looking to upgrade to 3400 hy
Transmission: 700r4
Axle/Gears: Stock? Lol
Well i'm having the same problem with my 91 camaro 3.1. Our tps is non adjustable. I was leaning towards torque converter just reading the symptoms


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