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Chugging, maybe Fuel Injectors??

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Old Feb 1, 2002 | 05:24 PM
  #1  
TrnsmGTA's Avatar
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Joined: Jan 2002
Posts: 76
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From: Tucson, AZ
Car: 87 Trans Am
Engine: 305 TPI
Transmission: 700r4
Chugging, maybe Fuel Injectors??

For awhile now at slow speeds my T/A makes a chugging sound until i give it some gas, on the highway it flies, but around town it has a problem going slow....
I thought it might be the fuel injectors, and i've used injector cleaners very often, but it still doesn't seem to fix the problem.
Any suggestions??? Can it be anything else??
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Old Feb 1, 2002 | 07:47 PM
  #2  
Rob P's Avatar
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From: Key West, Florida!
Car: 89RSconvtZZ4TPI
Engine: ZZ4TPI
Transmission: 700R4 TRIPP TRANNY
I would bet if you checked on a scanner you would see your pulse width on your injectors is big, like 2.7 or above at idle. When you get into the throttle a little, the pulse width decreases to around 2.1 or 1.8 and the car smooths out. A faulty O2 sensor is probably the cause. I am dealing with this exact situation now.
This is one simplistic explaination. I don't have all the facts on your car and am only making an educated guess. I'd say get a scanner and see what the car is really doing.
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