Need Help. Post Header installation Problems.
Thread Starter
Racer
Joined: Oct 2010
Posts: 448
Likes: 49
From: Marion IN
Need Help. Post Header installation Problems.
Hey guys I put a set of LG street headers and x pipe on my 03 coupe a couple nights ago and I am having some issues. I also removed the A.I.R. system.
The car idles fine and runs good for the most part. The car starts misfiring or surging at low rpms when the engine is under load. Basically, if I switch from first to second early, or it makes me go from first to fourth it starts surging until I get the rpms up a little bit. If the engine isn't under load it revs through the rpm range perfectly. Once I am about 1200 rpm's it cruises fine.
I have put about 100 miles on it thinking the computer needed some time to recalibrate. But it hasn't gotten any better. I also don't feel like it made my car any more powerful.
I am going to get it tuned, but I can't get it done until next week.
I took of the cats, and ran extensions. I made sure to hook them back up the correct way. I also put new plugs and wires on while doing the headers.
Any help would be awesome. I am afraid something is messed up. Please let me know if anything like this has happened to anyone else... Is it normal?
Thanks,
Daniel
The car idles fine and runs good for the most part. The car starts misfiring or surging at low rpms when the engine is under load. Basically, if I switch from first to second early, or it makes me go from first to fourth it starts surging until I get the rpms up a little bit. If the engine isn't under load it revs through the rpm range perfectly. Once I am about 1200 rpm's it cruises fine.
I have put about 100 miles on it thinking the computer needed some time to recalibrate. But it hasn't gotten any better. I also don't feel like it made my car any more powerful.
I am going to get it tuned, but I can't get it done until next week.
I took of the cats, and ran extensions. I made sure to hook them back up the correct way. I also put new plugs and wires on while doing the headers.
Any help would be awesome. I am afraid something is messed up. Please let me know if anything like this has happened to anyone else... Is it normal?
Thanks,
Daniel
Premium Supporting Vendor
Joined: Oct 2004
Posts: 36,838
Likes: 438
From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
It's lean and starving for gas
And coding the rear o2's
don't drive it over 3k rpms
It needs a tune...
Peace
Chip
And coding the rear o2's
don't drive it over 3k rpms
It needs a tune...
Peace
Chip
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Premium Supporting Vendor
Joined: Oct 2004
Posts: 36,838
Likes: 438
From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
Lean cars go boom when pushed hard.
You ECBM can not adjust enough to fix the problem...
Peace
Chip
