whats up fellas, Im getting a misfire at idle, You can hear it through the exhaust. Also in 3rd and 4th gear it misses at 6000 rpm's I cant get to redline because the car just hesitates and jerks, it feels like I hit the rev limiter but mine is set at 7200. My mods are 2.8, 60's, and 1 step colders. Any ideas?

 

Mine was misfiring pretty bad, but not really at higher RPMs. It turned out to be a clogged cat. But.. mine was bad enough to where it would not even let me get the car rolling sometimes. Check into the cat though.

 

The cat is already gone.

 

Ohh.. Sorry... That rules out my theory then. Good luck with it.

 

cleaned your maf lately?
checked your plugs? (what gap?)

other than that. sounds tuning related.

 

I've never cleaned the MAF since I've owner the car. I got 28,000 on it. and my plugs are gapped at .22

I cant believe no one has any input on this ****.

 

tune...doc will be on the eastcoast soon enough i would hit him up mans a ******* tech book

 

if you have iridium plugs that is your problem iridiums are not made for forced induction i had the same problem zex plugs solved it

 

Who is DOC? I already have a tuner down my way, Im not paying another $150 Or I wont have to since I already got a custom tune?

I got NGK copper plugs one step colder.

 

do the plugs look wasted

only thing i can think of is check the tune or try 2 step colder heard 2.8 somtimes req. them

 

iridium not good for boosted? since when there guy..... only way I was able to ever run my car full out was on iridiums.
but yeah I get a random misfire at idle myself, still can't figure it out.
but you one up high sounds more like spark blowout... regap your plugs to @.035 or so and you should be good to go. .022 is way to small for a 2.8 pulley

 

you don't drive a turbo honda. gap them at .35

 

...+1

 

I was gonna say that but it looks like you guys beat me to it. You can take the driver out of rice, but you cant take the rice out of the driver.

 

I've tryed to gap my plugs at .35. and the car just falls on its face bad! It will dead miss. I got my parts from TAG and they said gap them at .22....You 2 step colders will help?

 

If you get to a meet that I'm at, I wouldn't mind looking at it for you. It'd cost you a soda...or beer. I'd suggest cleaning the MAF and checking out the plugs first.
I'd ask who tuned the car but that might start a riot

 

Well PM me and let me know when your on the East Coast some where DOC and Ill be happy to meet up with you. A guy that used to be on these forums but totaled his car, Ron9919 tuned it. Im going to try and clean the MAF. but how come when I gap brand new plugs to .35 my car will not go anywhere? Should I do the 2 step colders since I got a 2.8?

 

Not sure, I had a 2.7 and used NGK BKR7E at .035 gap without issue for a long time.
Do you have a wideband installed.?

 

No. I got stock exhaust with cat.

 

I'm betting it's the 60s tune. You're lean spiking up high and hitting retard. Lowsy idle is another symptom of bad 60s fueling tables. We idle at below 1ms PW and the siemens 60s lose their ability to be linear at 1.1ms or so.

 

so whats the fix? i throw p0300 just about everyday at idle. 2.7 with 60's and ngkbkr7e gapped at .35. would raising the idle help?
p.s. last time i changed my spark plugs i didnt throw any codes for a week. since then its like clock work...along with a few others like a p0171, p0833, and a p0335.

 

The fix? A proper tune for those injectors. Raising the idle may help your idle issues, but you'll still get misfires right about 21kPa or so maybe at 34 as well. It also won't help the knock up high. Do you have HPT or just the guy that tuned you?

 

I have idle issues and p0300 too when I idle too long. Last time it worked well was when I reseated my injectors. I think they are part of my issue. I'm going to try new rings and resealing/cleaning them again. I was at .039 and it wasn't working out. .035 worked fine for me. I'm using .037 right now even with no issues. doesn't make sense that you can't even do .035 unless something is seriously wrong somewhere.

 

It has me stumped. I should shoot you his tune. The misfire is weird, it happens under idle.

edit tune sent

 

Cool. Let's have a look...

Yea, his IFRs are hosed. I see some adders in there, which should help. Let me send you my tune-in-progress. IFR should be good, offsets should be really close. Adders might be a bit rich around 1ms or so, but I haven't finished them. I would also try using my MAF as a base, because it matches the fuel tables pretty well. Pay no attention to the VE table. I'm only 2 runs in. I have over 100 hours into this tune and it is my best revision yet (so far).

sent... Use mine as a compair file and copy everything thats different in the fuel area.