lq4 spark knock/missfire at idle
#21
would a possibility of the tune be the reason its pulling timing? it has a 87 black bear tune but i never got a crank relearn. only because it never had an check engine light. it still had a rough/missfirey idle before the tune.
#23
no the shitty idle was there from when i bough it a couples months ago bone stock. i changed the knock sensors bc of the cel, i also watched the live data before i changed my sensors /pcm and it never pulled timing. i changed the sensors and the pcm at the same time and thats where im at now. the whole idle thing is unrelated to the tune, the knock retard is, i think
#26
Well I switch my stock pcm and tune in and it still pulls timing at wot. Has new knock sensors but I think it's from the wrong torque on them. That could be possibly setting it off. Is this causing any damage or loss of power?
#30
Since you have tried many other things it would be nice to go back and retorque your knock sensors just so you can rule out any possible problems from that. IMHO, i dont feel like you would be getting misfiring from improperly torqued knock sensors.


