Justin Gibbons

about a month ago I posted about trouble with car not running right, and the problem is that it's misfiring. It hasn't thrown SES, but is noticable missing form about 1700 -4500 rpm., after 4500rpm its just hard to say. But I definitely is missing. Could this be my computer? or maybe a coil pack?

Gregorya24

iTrader: (13)

are you still on that stock tune with the cam?

Justin Gibbons

Yes, total lift (ie .574 intake) is achieved with 1.85 rockers. If that matters.

Gregorya24

iTrader: (13)

thats probably where you problem is! get that thing tuned man and it should be a whole new car even if the cam isnt that big of a duration! but try changing the plugs and wires first!

Justin Gibbons

Plugs have only about 1000km on them, while the wires have about 7000km, the car has run fine with the set up, but over the last 400-500km's this misfire has evolved from barley noticable to absolute **** and getting worse....but still hasn't thrown a code.

beezer1519

iTrader: (19)

TUNE IT not to mention the fact that your running lean i'd say running your car like that for long is asking for trouble

Justin Gibbons

I know nothing when it comes to tuning...so I'll be sending the pcm to up tunes later this winter.

Just a question here, and i green in this area, but why would it be running lean?

RyanM02

iTrader: (1)

This is a no brainer. A tune will keep you from gambling with your motor.

Lean is mean and your machine will blow up in steam...

Relapse

iTrader: (4)

You might want to re-check the wires. When i was at the track one night my car started having mild backfiring/misfiring issues and as the week progressed it got worse and worse. I scanned the forums for any answers and finally someone told me to recheck my wires which i thought i had originally done and sure enough.. passenger side 8th boot had come loose, plugged that bitch in and it was good as new.

Justin Gibbons

Wires are fine, anyone think it could be a coil or 2.

beezer1519

iTrader: (19)

dude it's the tune the car doesn't know how to run with that cam in there, not to mention you throwing the lt's in there it's the air fuel ratio giving you a misfire... you know when your car wants to die and then it comes back after sounding like it was bogged out that's what set off my misfires... tune it and tune it fast especially if your beating on it that motor will detonate... = not good... perhaps you should get a tune near you if that's possible... mail order tunes aren't always the best... seriously though bolt ons+cam+lt's+stock tune=engine trouble

Justin Gibbons

Well I have no choice but get a mail order tune cause theirs knowone with 3000-4000km to tune the car....I was going to send the pcm to HP tuners, what do you guys think?...Any other places that you recomend

beezer1519

iTrader: (19)

true didn't know your location... i know someone will hopefully have advice for you as far as mail order goes... that sucks good luck