1981 Monte Carlo, V8, TH350, Quadrajet, smog equipment intact.
I've been having some mild knock after the engine is fully warm, during acceleration as I roll into 2nd and 3rd gear then fades away as the gear progresses. It also knocks, a bit louder, if I try to pass so ive been driving like an old lady lately ha ha! Currently running 91 octane because knock is worse with 87. I have been suspecting the idle mixture solenoid might be adjusted wrong. I recently saw a video where someone had a similar problem. He disconnected the solenoid pigtail and his lean knocking went away. I decided to try the same with similar results, no knock no matter how much I mashed on the pedal. Does this test make sense? Is this a logical way to test for a wrongly adjusted or bad solenoid? Of so, does this mean my problem lies with the solenoid and not somewhere else?
I usually take my carb to a shop but they've been letting me down last couple rebuilds. I researched how to open up the carb and adjust it with that "special tool." My wrenching skills are better than they were few years ago. Feel confident I can make this repair myself if this is my problem.
Thanks in advance for any feedback!!
I've been having some mild knock after the engine is fully warm, during acceleration as I roll into 2nd and 3rd gear then fades away as the gear progresses. It also knocks, a bit louder, if I try to pass so ive been driving like an old lady lately ha ha! Currently running 91 octane because knock is worse with 87. I have been suspecting the idle mixture solenoid might be adjusted wrong. I recently saw a video where someone had a similar problem. He disconnected the solenoid pigtail and his lean knocking went away. I decided to try the same with similar results, no knock no matter how much I mashed on the pedal. Does this test make sense? Is this a logical way to test for a wrongly adjusted or bad solenoid? Of so, does this mean my problem lies with the solenoid and not somewhere else?
I usually take my carb to a shop but they've been letting me down last couple rebuilds. I researched how to open up the carb and adjust it with that "special tool." My wrenching skills are better than they were few years ago. Feel confident I can make this repair myself if this is my problem.
Thanks in advance for any feedback!!