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Old 03-15-2016, 10:15 PM   #9
MudDiGGer25
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Join Date: Jan 2016
Location: Jamestown ND
Posts: 21
Re: 1990 Suburban (350 TBI) knock problem

Just wanted to post my results even if this is an old thread, just in case it helps some one out down the road.

Here is a video of the data readouts this afternoon. I did let it warm up to the point where the needle just raised off the line on the gauge.

https://www.youtube.com/watch?v=IZn_...r#action=share

I still have some knock counts when i rev it quick but only then.

MY o2 seems to be operating properly even without the heater element hooked up yet. I was in closed loop already when I connected the scanner.

I have noticed more kick on the 1-2 shift at WOT anywhere from 3000-6000 (if i control it manually)
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1988 V10 Suburban 5.7L TBI/TH350 w/ 39K on rebuild 3.42AR
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