Tac Map Mike
Newbie
Hi there, I have a 1991 gmc Sierra 2wd Reg cab. No engine codes. Rough idle (been there a long time). New plugs, wires, rotor, and cap.
Today it Just started making a tapping noise (sounds like metal on metal) on the driver side. Doesn’t sound like motor knock. Almost sounds like a rocker arm or something? I pulled off the valve cover and some rockers have a bit of play but I didn’t feel like tackling those today or even know if that’s the problem. Doesn’t happen in park - only in drive on acceleration. Doesn’t seem to matter if it’s warm or cold.
Any ideas?
Today it Just started making a tapping noise (sounds like metal on metal) on the driver side. Doesn’t sound like motor knock. Almost sounds like a rocker arm or something? I pulled off the valve cover and some rockers have a bit of play but I didn’t feel like tackling those today or even know if that’s the problem. Doesn’t happen in park - only in drive on acceleration. Doesn’t seem to matter if it’s warm or cold.
Any ideas?
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