Spark Plugs not solving problem under boost?
Sep 22, 2018, 12:57 PM
#1
Newbie
Thread Starter
Spark Plugs not solving problem under boost?
So recently I had my car tuned, but after a some pulls the car started breaking up under boost. So I got new spark plugs, NGK BPR8EIX. I gapped them at .025 and still had the same issue. Then I tried .021, issue persists. The car is running 24psi.(Full mod list here: https://www.evolutionm.net/forums/ev...l#post11840203)
Do I have to go to an even tighter gap or is this an issue from somewhere else? Thanks for reading.
Do I have to go to an even tighter gap or is this an issue from somewhere else? Thanks for reading.
The following users liked this post:
jzell97 (Sep 27, 2018)
The following users liked this post:
jzell97 (Sep 27, 2018)
Sep 23, 2018, 09:32 AM
#4
You absolutely do not need that plug. Go back to the stock heat range, as suggested above, and see if that helps. Make sure they are CAREFULLY gapped (it's easy to break off the iridium tip). If your wires aren't OEM, try to track down a set of OEM coils/wires to see if that helps. At your power level, OEM is best.
Sep 24, 2018, 06:21 AM
#5
Newbie
Thread Starter
Alright I tried BPR7s and still have the problem, will get new set of coils and wires and Ill update the thread on whether it solved the issue. Thanks
Also it looks like I do have aftermarket wires, as theyre red, not black.
Also it looks like I do have aftermarket wires, as theyre red, not black.
Last edited by jzell97; Sep 24, 2018 at 06:45 AM.
The following users liked this post:
jzell97 (Sep 27, 2018)
Sep 27, 2018, 05:28 AM
#7
Newbie
Thread Starter
Alright so it was the plug wires, they were probably some junk aftermarket ones that the previous owner used, replaced with OEM. Car runs great now and currently using the BPR7 plugs. Thanks for the help everyone!
