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Location:  Main Index » Forum Index » Chevrolet Cars 1980-2016 » 1990-1993 Chevys » L03 TBI Missing at low throttle around 50mph cant get to bottom of it » Post#2855170




Username Post: L03 TBI Missing at low throttle around 50mph cant get to bottom of it
Tony1963 
Frequent Contributor
Posts: 2448

Loc: Orlando Florida
Reg: 07-09-18
 02-28-23 05:11 AM - Post#2855170    
    In response to Chevyman Sheffield England

A vacuum leak will show up at idle and low speeds like you are mentioning. It will be worse when under some type of load. You will need a scan tool to monitor fuel trims and also check for misfire counts.

That GM OBD I system has great data points and you must have a proper scan tool to diagnose the issue.
People fear change because it threatens what they know, or what they claim to know.

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Location:  Main Index » Forum Index » Chevrolet Cars 1980-2016 » 1990-1993 Chevys » L03 TBI Missing at low throttle around 50mph cant get to bottom of it » Post#2855170




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