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Old 04-29-2018   #5
TX '90 ZR1
 
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Join Date: Oct 2017
Location: TX
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Default Re: Is This Even Possible? Vaccum Related

Quote:
Originally Posted by DRM500RUBYZR-1 View Post
Kenny,
If the backfire occurred other than at start up, kindly provide the background and circumstances of what happened, and when.
Also describe the mods to the car, especially the cats, O2 sensors and exhaust.
Momentary fuel starvation followed by an overreaction either computer induced from bad input, or fuel pump pressure related issues would be some of the usual suspects.
I would start with an evaluation of the pumps and validation of fuel quality.

Marty
Marty,
I was not going to get in detail about the possible fuel issue 'till I have chased all the rabbits down the hole. Presently I am suspecting weak pump. Will post when I get all the checks done.
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Kenny
1990 #442
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