It's got spark

[knochgoon24]

I've been having this problem with the car stuttering anytime I really jumped on the gas. It would start breaking up at about 10psi. I had done a boost leak test and replaced the TB shaft seals. The AFRs were about right for a stock car (9.5 give or take) but it was sputtering badly.

I had ordered up some new spark plugs with my last order to STM. Figured it was about time to put them in. BPR7ES gapped to .028".

When I pulled the old ones (they've been in since I bought the car, I noticed the gap was wide. I had just gapped them in September, but still, they were all .035-.043" gap on all them. WTF I think I found my problem...

Swapped the new plugs in and the car runs like a dream. I was FINALLY able to turn the boost back up to a solid 15psi. Until I can go out and do a few pulls with that, I'm not going higher. I don't think I'd get much more by doing 17psi, which is all I'd risk before getting some ARP headstuds.

With it being below freezing, the car pulls like a champ. I CAN'T heat soak my intercooler. Once I get the exhaust leak fixed, I should be good to go.

 

[costas14]

i just put ngk plugs in since my car was stuttering like crazy, it just randomly does it now, you hit the gas it'll be fine let go and hit it again and it sputters then let go of the gas and back to normal, i wonder how the spark plugs are now