Code 33!
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Joined: Dec 2005
Posts: 200
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From: Canadia
Car: 1991 RS
Engine: 90' TPI 305
Transmission: T5
Axle/Gears: posi disc 3.23's
Code 33!
https://www.thirdgen.org/techbb2/sho...hreadid=344747
weird issues, i need suggestions on how to solve a code 33
weird issues, i need suggestions on how to solve a code 33
Joined: Jan 2005
Posts: 10,426
Likes: 497
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Was the 87 Iroc engine a TPI engine swapped into a TBI car underneath a stock TBI system?
If so it will run poorly.
I would suggest hooking a vacuum gauge to your engine and starting there. Low manifold vacuum can set an intermitent code 33. For example lets say your engine drops down to less than 10 in/hg of vacuum with the engine idling in gear at a light, the check engine light will glow due to a code 33, now you start off and get to cruising speed. The throttle is open more, the TPS reading is higher, and finally the MAP reading is lower, now the parameters are no longer met for the code 33 and the light goes out.
If so it will run poorly.
I would suggest hooking a vacuum gauge to your engine and starting there. Low manifold vacuum can set an intermitent code 33. For example lets say your engine drops down to less than 10 in/hg of vacuum with the engine idling in gear at a light, the check engine light will glow due to a code 33, now you start off and get to cruising speed. The throttle is open more, the TPS reading is higher, and finally the MAP reading is lower, now the parameters are no longer met for the code 33 and the light goes out.
Last edited by Fast355; Feb 5, 2006 at 10:00 PM.
Thread Starter
Member
Joined: Dec 2005
Posts: 200
Likes: 0
From: Canadia
Car: 1991 RS
Engine: 90' TPI 305
Transmission: T5
Axle/Gears: posi disc 3.23's
Originally posted by Fast355
Was the 87 Iroc engine a TPI engine swapped into a TBI car underneath a stock TBI system?
If so it will run poorly.
Was the 87 Iroc engine a TPI engine swapped into a TBI car underneath a stock TBI system?
If so it will run poorly.
But it has never ran this bad before. I get the code 33, but i dont think its just that. Why when i turn sometimes or am just driving along will it all of a sudden bog down really harshly?
Someone suggested checking the fuel regulator
also, the SES light is not intermittent. Its permanatly on.
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