95 gt spark knock
#1
95 gt spark knock
I am at wits end. Car is a stock 5.0 auto (except for h-pipes and cold air intake). I can not stop the spark knock had the car 1 1/2 years). Seems to be worse under light acceleration. Engine runs decent. I have replaced both O2 sensors, distributor cap and rotor, and had the timing adjusted to 10 degrees (yes, the plug was unplugged from distributor). Nothing I seem to do matter. I can;t notice any improvement with premium fuel either.
I have eafomed the car twice. Still no difference. Any suggestions would be greatly appreciated!!!
I have eafomed the car twice. Still no difference. Any suggestions would be greatly appreciated!!!
#2
Make sure your balancer has not slipped, confirm #1 piston is at TDC when balancer timing mark is at 10* or whatever your setting it to. You may be running more timing than indicated if this has happened.
Pull your KOER and KOEO codes, make sure something isnt wrong there.
Correct spark plugs and heat range?
Pull your KOER and KOEO codes, make sure something isnt wrong there.
Correct spark plugs and heat range?
#6
I am at wits end. Car is a stock 5.0 auto (except for h-pipes and cold air intake). I can not stop the spark knock had the car 1 1/2 years). Seems to be worse under light acceleration. Engine runs decent. I have replaced both O2 sensors, distributor cap and rotor, and had the timing adjusted to 10 degrees (yes, the plug was unplugged from distributor). Nothing I seem to do matter. I can;t notice any improvement with premium fuel either.
I have eafomed the car twice. Still no difference. Any suggestions would be greatly appreciated!!!
I have eafomed the car twice. Still no difference. Any suggestions would be greatly appreciated!!!
#7
Slipped balancer
Make sure your balancer has not slipped, confirm #1 piston is at TDC when balancer timing mark is at 10* or whatever your setting it to. You may be running more timing than indicated if this has happened.
Pull your KOER and KOEO codes, make sure something isnt wrong there.
Correct spark plugs and heat range?
Pull your KOER and KOEO codes, make sure something isnt wrong there.
Correct spark plugs and heat range?
Plugs are Autolite Copper core 25DP2. Is this correct?
Thanks!!
koolking
#8
Stock fuel pump
It seems to perform well under wide open throttle conditions (well, as well as the really high stock gear will let it.) Of course, it may still be spark knocking at WOT but I am not hearing it because of the exhaust and other engine sounds.
Thanks a bunch!!
#9
Seafoam
My neighbor mentioned the EGR valve. I hate to admit it but I am not entirely sure how they even function. Would you replace the position sensor also??
Appreciate your help! I love this car and really want to fix it.