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Old 01-25-2016, 07:46 PM   #6
MudDiGGer25
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Join Date: Jan 2016
Location: Jamestown ND
Posts: 21
Re: 1988 V10 Suburban TBI running rough

Quote:
Originally Posted by BRUISER View Post
Have you checked the numbers on the engine, TBI, or ECM to verify what you have?
I am not sure yet where the ECM has been put, I havent really looked for it either but would i be looking for printed numbers or "burned in" numbers?

Where should I look on the TBI for #'s? admittedly it may not be original to the block.

After doing some reading up on the 43 code IIRC, has something to do with the spark control unit by the MAP sensor (not sure if i accidentally called it a MAF earlier, i was tired) or the knock sensor by the ??oil filter??? is there a way I can unhook one of these without making the computer too mad to test drive? Logically I would think that unplugging the knock sensor on a obd1 would set a code but it would not be able to affect the timing due to the open circuit? anyone that knows better please chime in, but i do love process of elimination XD
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1988 V10 Suburban 5.7L TBI/TH350 w/ 39K on rebuild 3.42AR
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