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Originally Posted by Tahoe_Sport
I have an Airaid cold air intake and an airaid throttle body spacer on my 97 Tahoe. I keep on getting misfires driving on the interstate. I took it to the dealership and there were no codes in the computer excpept it said the timing was off and the air/fuel ratio was off. They fixed the timing but could not fix the air/fuel ratio because they said they couldn't do it since I had the intake and tbs on. Does anybody have any suggestions on what I could do or what could be my problem? I have replaced all plugs, wires, rotor and dist. cap with ac delco parts and that still hasn't solved the misfire.
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First, throw that TBS away. They do practically nothing for our engines.
Second, disconnect the battery for about 5 minutes. Once you reconnect the battery it is supposed to force the PCM to reset. Drive it a couple times. The PCM takes down all the new info and makes adjustments accordingly. You should notice better driving quality within 2-3 trips.
If that doesn't work, let us know and we will go from there.
Jake