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Random stumble in throttle?

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Old Aug 11, 2014 | 07:00 AM
  #1  
The_Wraith's Avatar
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Joined: Jan 2002
Posts: 1,122
Likes: 2
Car: 1984 Trans Am 15th anniversary
Engine: L69
Transmission: 700r
Axle/Gears: 3:73
Random stumble in throttle?

Was out on a long trip yesterday and all of the sudden I went to hit the gas and got a dead spot in the throttle and a lean smell shortly after. If I kicked the throttle down hard it would pick up speed, but would randomly choke at normal acceleration. This problem would go away and then come back an hour later. A restart seemed to take it away for a bit, no codes. It seemed to have gotten worse later on in the night where you could feel the whole car bucking when you hit the gas. This is an 86 tpi
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Old Aug 11, 2014 | 08:28 AM
  #2  
ThirdGenKen's Avatar
Junior Member
 
Joined: Jun 2014
Posts: 87
Likes: 0
Car: 1987 Chevrolet Camaro Iroc Z28
Engine: 383 Stroker supercharged.
Transmission: 5 speed manual transmission
Axle/Gears: 3.45 posi rear
Re: Random stumble in throttle?

When is the last time you did a tune up?
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Old Sep 2, 2014 | 09:28 AM
  #3  
sweetmelissa's Avatar
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Joined: Jan 2013
Posts: 177
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From: Hanson, Mass
Car: 1989 Iroc-Z
Engine: TPI 350
Transmission: 700R4
Axle/Gears: 3:27's
Re: Random stumble in throttle?

This just happened in my 89 !!!! Did it "once" before months ago and no code was set this time it is doing it constantly,,, I barely got it home... Pulled in garage shut if off and pulled codes,, got a 33 !!!!
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Old Sep 2, 2014 | 02:08 PM
  #4  
ThirdGenKen's Avatar
Junior Member
 
Joined: Jun 2014
Posts: 87
Likes: 0
Car: 1987 Chevrolet Camaro Iroc Z28
Engine: 383 Stroker supercharged.
Transmission: 5 speed manual transmission
Axle/Gears: 3.45 posi rear
Re: Random stumble in throttle?

It used to do it to me in my car, then I did a full tune up. Runs great now.
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Old Sep 3, 2014 | 09:47 AM
  #5  
sweetmelissa's Avatar
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Joined: Jan 2013
Posts: 177
Likes: 0
From: Hanson, Mass
Car: 1989 Iroc-Z
Engine: TPI 350
Transmission: 700R4
Axle/Gears: 3:27's
Re: Random stumble in throttle?

Did you get a code 33 ?? This car is well maintained and the tune up parts are all good.. Did you get "ANY codes at all before you did a tune up ??
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Old Sep 6, 2014 | 08:16 PM
  #6  
Chevy2035's Avatar
Junior Member
 
Joined: Feb 2014
Posts: 56
Likes: 0
From: Akron, Ohio
Car: 92 Camaro RS
Engine: 355, Vortec heads, XE274 cam, 9.8-1
Transmission: 700r4 built for 800-900hp
Axle/Gears: 3.73 Gov Lock, Soon to change
Re: Random stumble in throttle?

Check your fuel filter / Fuel PSI sounds to me like it is clogged or your fuel pump is getting weak / Low volume
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Old Sep 7, 2014 | 08:07 PM
  #7  
sweetmelissa's Avatar
Member
 
Joined: Jan 2013
Posts: 177
Likes: 0
From: Hanson, Mass
Car: 1989 Iroc-Z
Engine: TPI 350
Transmission: 700R4
Axle/Gears: 3:27's
Re: Random stumble in throttle?

Replaced my fuel filter today !! When I took the old one off I shook it and it sounded like a can with some rocks in it,, the inside of it was banging around.. Never saw this on a fuel filter before but glad I installed a new one. The old one was a fram !!!!

Went for a ride and a few minutes later,, same thing !!! started cutting out and hesitating then smoothing out again,,, came to a stop and engine idled fine,, happens when stepping on the gas......Checked codes and got 33 again !!!!!
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