XJdryva

Think it's time for a tune up guys but the strange thing is it seems to not be lacking any power at all. It sounds like a bunch of fire crackers going off if I accelerate steady at lower rpm with the exhaust I currently have on it. I'm thinking plugs, wires, cap and rotor for starts but we'll see if it needs anything else. I run seafoam through it religiously and replaced the fuel filter a few months ago so I think it's definately the electrical side of the equation causing the miss. *** always, any input would be appreciated

ZINGGG

Definitely start with a tune up. If it hasnt been done since you got the car, it's definitely time. Great reassurance for the price of the parts.

Also clean the TB and IAC if you haven't already done so

RTorrez1

That is the perfect starting point. Don't forget a new air filter too.

XJdryva

I have a CAI with a cleanable air filter and I run the intake cleaner seafoam as well (which helped out with an ilde problem it had when I first got it) but it for sure hasn't had a tune up in several year considering it sat in some guy's yard for a good 2 years and I did literally nothing to it but put gas in it and change the oil.

RTorrez1

Uh, Yeah!
I would say it's time for a tune up. Since you have a CAI, I would recommend cleaning out the filter if it hasn't been done in a while.

XJdryva

Sorry guys I've been busy swapping the auto for a 6 speed in my T/A and haven't really had time for the Jeep. Just had to pull a buddy out of his own front yard and I noted a pretty dead miss at all RPMs now. The CEL finally came on and said cylinder 6 missfire detected. I had been running the hell out of it prior to the miss starting up so it's possible I broke the spark plug. I'll pull the plug out of #6 tomorrow and have a look

XJdryva

WELL $HIT!!!! New plugs, new wires, new rotor, new bug, Missfires at ALL RPMS, NO POWER, flashing CEL:br ickwallCEL is still missfire detected on #6) Plugs all looked identical when pulled out and weren't wet or burned or missing pieces. Injector possibly?????

ZINGGG

Do you have the firing order correct? If you think you do, check again.

XJdryva

I did one plug and wire at a time so I didn't have to know the firing order. It got progressively worse, not just a fine one minute, F'ed the next. It started smoothing out around 2500rpm then it moved to around 4000 then it just became a dead miss period at all RPMs. I unplugged the #6 injector and no difference whatsoever

XJdryva

ZINGGG

Hmmmm what kind of plugs did you use? And did you make sure it was gapped correctly? Gotta start with the most obvious of possibilities first!

XJdryva

Delcos gapped at .35. Nothing changed after changing the parts, just got progressively worse over a couple of hours. Just haven't had time till now to post about it cuz I've been working on 3 other projects at once

salad

Should be Champion or NGK coppers at .035" lol

I'd look into that injector on cyl #6. Try moving it to another cyl and see if the misfire follows There have been a few threads lately about checking to see if its working at all (the kind of test where you should have a fire extinguisher handy!) Sounds like you could give that a go.

Also sounds like time for an upgrade!

XJdryva

Yeah it's .035. I unplugged another injector and the missfire code came up for that cylinder as well so I think it is an injector. That and #6 doesn't click. 703s are $25 a piece on ebay so yeah time for an upgrade

ZINGGG

Yeah sounds like your injector. Try the vendor here that sells injectors. He'll get you set up with a set of 6 for about $60