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Old 03-06-2016, 12:46 AM   #6
MudDiGGer25
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Join Date: Jan 2016
Location: Jamestown ND
Posts: 21
Re: 1990 Suburban (350 TBI) knock problem

I really didnt want to resurrect a really old thread but after weeks of google searching im coming up with nothing definitive, I must. I can describe my engine almost EXACTLY the same, all the same parts and more replaced, high knock counts when i rev it and around cruising speeds in town. I unplugged my knock sensor and the "bog" went away but so did alot of my power. fuel type used barely affects it. (87,88,89,91,93, with or without ethanol) my next thing is to double check my FP then replace the knock sensor. but there are so many threads like this one that never got a result posted, and that is frustrating lol
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1988 V10 Suburban 5.7L TBI/TH350 w/ 39K on rebuild 3.42AR
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