S2000heart

It's ap1 and has only about 51000 miles.. I keep getting misfire on 1&2. First time when I got it I changed coils numbers order to 4 3 2 1.. And deleted the codes.. In a few weeks I got the same misfire on 1&2 so it wasn't coils.. So I bought brand new spark plug and installed em and delete the codes.. A fewdays later I got the misfires again.. What can I do now?
Car runs well.. Please help me

S2000heart

Still locking for help

S2k Eire

Try setting the clearances on your valves, or do a search for more info

S2000heart

Btw my s2000 is getting high ground resistance when engine is shut off. I'm thinking it's causing the misfires.. What can I do??

Gator_S2K

This may sound ridiculous, but I was getting CELs for misfires on 1&3, and Random/Mult misfire. They seemed to randomly come and go and I never really noticed any difference while I was driving. I finally got annoyed enough to try and fix it when I read the sticker by my gas cap. It said to tighten to 3-4 clicks or it may cause a CEL. Ever since then I am sure to tighten the gas cap at least 4 clicks. No joke, I haven't got a CEL since (but my pride took a shot lol) Good luck!

S2000heart

Yeah.. But, I don't think that's my case.. It maybe but.. Idk
I got those cel lights, a few days after putting putting gas so.. Probably not.
I'll try to adjust valves and get new injectors

dagle

compression test?

jonathanyip343

Run compression test first. and tell us the numbers

1FastS2k

My misfire issue turned out to be injectors, but a friends was bent valves. Try doing a comp test first and post the #'s.

JohnsS2000

gas cap seal migt have a TINY crack in it. mine did and the pressure loss in the tank caused a CEL. I have also heard of and known of a couple of people that had mechanically over revved engines that they had bent valves. A leakdown test revealed the issues as well as an attempt to adjust the valves finding cracked spring retainers