black_z

iTrader: (4)

In the past few weeks, every once in a while the car will kind of sputter, stumble, or miss at low RPM's ~1200-1800 when accelerating slowly, and pull out of it when I give it more throttle The weird thing about it is that it has only done it in 1st through 4th gears, and It is completely random. Happened maybe 10 times in about 400 miles of driving. Fuel filter and plugs were changed last spring, I pulled a few plugs and they looked fine and the gap was good. This started happening after my new clutch kit was installed roughly 3 weeks ago. It doesnt seem like something clutch related, but im really not sure.

black_z

iTrader: (4)

Come on, someone has to at least have a hunch.

black_z

iTrader: (4)

^^^^^^^^^^

blkZ28spt

What other mods do you have? Mine does something very similer from time to time when accelerating off idle. If I give it too little or too much gas it is fine, but at the right throttle position and engine speed it seems to stumble a little. I havn't worried much about it.

*Oh yeah, it did it before and after my most recent dyno tune and it does it in neutral as well.

Adrenaline_Z

When was the last tune up? Could be coils, or wires?

black_z

iTrader: (4)

Car has LT's ORY catback, and lid, newer NGK TR55's that look good, taylor wires.

AsianIce25

iTrader: (2)

my guess is the pcv system. put in a 2003 Z06 pcv valve and a catch can or line dryer and it will help. try it...

black_z

iTrader: (4)

Thanks for the tip, ill try that.

Tally TransAm

iTrader: (17)

im going with bad front o2 sensors

AsianIce25

iTrader: (2)

could be O2's, but it could be a lot of things. i had only 23K on my Z that i bought brand new off the lot and it started acting funny. im really **** about my car, i get pissed when people even get dirt on my carpet ( im the one who spends 8 bucks a wash to vacuum it and crap). anyway, i changed my wires at about 15k and i change the plugs with ngk tr6's every 10k. it was missing so bad i could barely get down my street unlesss i gve it some love. it would run ok at about 3k+ rpms. so, i changed the pcv valve, and it wa a lil better, then put a campbell hausfeld line drier inline with the valve and it was money. weird how that works, but it did...

black_z

iTrader: (4)

Wouldnt it do it all the time with bad 02's? Or throw an SES?

AsianIce25

iTrader: (2)

well, if the O2 were just plain bad, then yes, it would throw a code and what not. however, its possible that theyre going bad, and just reacting slowly. but if the voltage was out of range, then youd know. im prob going to replace my O2's at 45k miles or maybe 40k. i have 35 on the car, but i believe in preventative maintainence.

black_z

iTrader: (4)

I should try that, my car has 75K and as far as I know has the factory 02's.