lt1 backfireing!!!!!!!!!!!!!!!! HELP!!!!!!!!!
Thread Starter
Teching In
Joined: Aug 2006
Posts: 33
Likes: 0
From: SAN JOSE, CA
lt1 backfireing!!!!!!!!!!!!!!!! HELP!!!!!!!!! having some backfiring problems with my SS. i took off the wires and checked spark. 2 out of the 8 have low spark the other 6 bout the same. could that mean need a new opti or could it be i have 2 defective wires. have msd wires and 1 1/2 year old msd opti. i currently have ngk spark plugs but was wondering if the ac delcos are better or bout the same?? any help would be great thanx!
Thread Starter
Teching In
Joined: Aug 2006
Posts: 33
Likes: 0
From: SAN JOSE, CA
it has a constant misfire. checked all my plugs and wires again an the all seem to be good. i put a obd2 to it and it doesnt tell me wat cylinder misfireing it gives me code p0300 which says engine misfire. im guessing it gana end up being my opti.
On The Tree
Joined: Jan 2008
Posts: 108
Likes: 0
From: prince rupert
I had problems in the high rpm range at wot and it was the coil. I cleaned the coil contact and changed the coil wire.
Our problems don't sound the same at all though, sorry I can't be more help. I just finished talkin on a thread about stock/accel/msd optis. You sould give it a read if infact you do end up changing your distributor. Good luck
Our problems don't sound the same at all though, sorry I can't be more help. I just finished talkin on a thread about stock/accel/msd optis. You sould give it a read if infact you do end up changing your distributor. Good luck
TECH Regular
Joined: Feb 2008
Posts: 465
Likes: 0
From: Pearl City, Hawaii
Start her up at night and pop the hood. In the dark, if you have a crack in your cap you might be able to see some fireworks below your waterpump. My coil wire a while back was grounding out to the MAF bracket that it was rubbing on.
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