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Low rev for some reason

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Old Mar 31, 2010 | 06:32 PM
  #1  
DHo's Avatar
DHo
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From: London, Ontario
Car: 1986 Trans Am
Engine: Vortec V8 5.0L
Low rev for some reason

Hey my 86 TA is having a hard time going over 2200RPM, and acceleration is really slow compared to before. It hesitates when I hit the gas, takes a little while sometimes to start. Runs good when cold/in cold weather. Any ideas? (maybe fuel pump?) Thanks!

PS also I have a check engine light when I'm going under about 50km/h, and it goes away after I'm going faster than that.

Last edited by DHo; Mar 31, 2010 at 06:49 PM. Reason: Adding info
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Old Apr 1, 2010 | 08:02 PM
  #2  
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From: NY
Car: 98 z28
Engine: ls1
Transmission: t56
Axle/Gears: 12 bolt/ 4.11
Re: Low rev for some reason

is it carbed or tpi/tbi? get that code read to see what that is first
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Old Apr 2, 2010 | 11:15 AM
  #3  
DHo's Avatar
DHo
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From: London, Ontario
Car: 1986 Trans Am
Engine: Vortec V8 5.0L
Re: Low rev for some reason

Yeah it's a TPI.. is there a way I can pull codes without a scan tool? I have access to a Tech 2 at my school but I won't be able to get in there until Monday, wanna get it looked after before then.. I fixed the TPS and the check engine light is gone now but I still have that hesitation
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Old Apr 3, 2010 | 08:41 AM
  #4  
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Joined: Dec 2008
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From: NY
Car: 98 z28
Engine: ls1
Transmission: t56
Axle/Gears: 12 bolt/ 4.11
Re: Low rev for some reason

autozone does it for free but if the ses light is gone then they wont get any codes... my guess is youre a/f ratio is off
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Old Apr 3, 2010 | 06:26 PM
  #5  
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DHo
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Joined: Mar 2010
Posts: 9
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From: London, Ontario
Car: 1986 Trans Am
Engine: Vortec V8 5.0L
Re: Low rev for some reason

Yeah it is smelling real rich and is using a LOT of gas.. I'm gonna have it checked out Monday
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