MFJ

iTrader: (4)

I just did the headers. I also got rid of the AIR system, cats and rear o2's. Car ran fine after a few minutes of re-learning before the y pipe was put on today. Now it runs rough and when you go to stopthe rpm's drop and it idles rough as hell. I did change plugs as well. My Frost tune will be here on Wednesday. Will that fix it?

raysadude

iTrader: (11)

Check for vacuum leak, I drove my car after headers installed without a tune and it was fine.

LS-ONE_DAY

Mine runs fine after headers as well, minus maybe a small exhaust leak. It does run rich though.

Check for vacuum leak, check coil pack connections and plugs and wires

MFJ

iTrader: (4)

I just put it on the Genisys. Only codes were for the rear 02's which aren't there. It is running really rich. front o2's are working. It did get worse the more I drove it from the muffler shop. I haven't driven it since then. No codes for misfires but I'll check the wires again anyway. I put them on so I could have one loose I guess. Maybe a coil going bad? It just idled fine while were looking at it. If it were a vacuum leak it would run rough all the time right? Once I cleared it out (higher revs) it was really slow back to idle. Maybe it's just loading up?

raysadude

iTrader: (11)

Oh and check if any of the plug wires touching the headers primaries

MFJ

iTrader: (4)

Just checked that. All looks good there.

MrMixnMatch

iTrader: (1)

Did you install the freeze plug from removing the EGR?

MFJ

iTrader: (4)

It's a 2002. No EGR

Ok I just drove it home from work. About 2 miles. As long as you don't get it above 2500 rpm it acts normal when stopping and idling. If you get it above that for any length of time it is a slow fall to idle and drops down to around 400 rpm and will stay there until you give it a little throttle. Any ideas? Disconnect the battery and may be let it re-learn?

mjs1012

iTrader: (36)

since you said you have a frost tune on the way you might as well wait to put that in so you know the car will be running right. and how are you driving with the car with the computer being shipped out?? you have an extra??

MFJ

iTrader: (4)

Yep I have an extra. One will be for daily driving and the other for the laughing gas. Steve shipped it to me today. I should have it Wednesday. Maybe I didn't cap off the right hoses when I removed the AIR solenoid from the rear of the driver's side valve cover?

TImmy_Jones

iTrader: (4)

I vote melted o2 sensor wire or vac leak...keep checking

MFJ

iTrader: (4)

The front o2's were checking out good. I would say vacuum leak as well but I can't find one. The only thing I disconnected and removed was the solenoid for the AIR system. there was a small vacuum line connected to the bottom of it and I plugged it off. If I had a schematic for the vacuum lines I would check them but I'm sure they're all plugged in. It ran and idled fine until the y pipe was put on today and they did a shitty job making it. Exhaust leaks like hell at the collectors. It has to go back to the exhaust shop.
I guess they could have cracked or broken one of the o2's when they slid the y-pipe in? I have to have this car ready to go by Thursday night. It has to be in NC on Friday at my brother in-laws shop to get the clutch done and ready to race on Saturday.

I'll check one more time for a burnt wire on the 02's just in case.

ComeAtMeBro

ive been on headers, ory and cat back for 13000 miles without a tune. might have ruined my 02s... but all well

as for idle.. im fine

wildcamaro

iTrader: (15)

Check spark plugs wires...the jerk who did mine a long time ago didn't Push the rear boot all the way on...I drove it home a 100 miles on 7 cylinders! Headers shouldn't cause a problem especially on 99 and newer with the better ecms...look for all the easy stuff bc that's usually what it ends up being

MFJ

iTrader: (4)

I disconnected the battery after the exhaust was fixed today. Yesterday it was leaking like hell. A few minutes of re-learning and my idle is back to normal. I was up until 12 last night checking wires, o2's, vacuum and now it's fine. Hopefully. The new tune will be the real test I guess.

Thanks for all the help guys. I appreciate you taking the time to help.

TImmy_Jones

iTrader: (4)

Hope it is still running smooth!

MFJ

iTrader: (4)

Drive it 300 miles to NC. Installed the monster stage 2 last night. Been driving like crazy to heat cycle the clutch. Heading to Jacksonville, nc in about an hour for a test and tune.

andy-lswon

iTrader: (1)

I just installed tsp headers and tds this week. It's a 98 so egr and air was removed. The pump is still there for the air but disconnected. Untuned and it runs good. Def putting more more power down even untuned bc the car def spins more now. Drives fine other than running rich but I'm getting a tune next month once I get some other mods on. Should wake it up even more with a tune with everything running how it should

raysadude

iTrader: (11)

Isn't there any break in period for the monster clutch?

MFJ

iTrader: (4)

yep. 500 miles. I drove myself silly on Friday night and Saturday putting miles on it. Drove from one beach to the next and just cruised. Which was a pain in the *** but it had to be done. Now I need a stronger M/C for the clutch. But the car is running ok.