[Z06] Frustrated after AR header install
#1
Cruising
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Frustrated after AR header install
I had AR headers installed with stock exhaust and a k&n filter and now it runs rough at any steady RPM. I have replaced the spark plugs and wires and it still does it. I took it too a local well know tuner and he richen it ,leaned it , retarded timing, open loop, closed loop, and matter what I do can't get rid of surging, nugging, skipping feeling went I'm criusing at a steady RPM and its at all RPMS. So I put the stock filter on and wires back on didn't help. So I took it too the local dealer and they said there were no codes so it must be the headers and I knew they were going to say that. Does anyone have any ideas on what is causing this? Could o2 sensors they installed be connected wrong?
Keith
P.S. One good thing while on the dyno he was able get 485 hp 455 torqe
Keith
P.S. One good thing while on the dyno he was able get 485 hp 455 torqe
#2
Le Mans Master
I had the AR headers installed at Carlisle but I have a few more MODs than you. (see sig. below). I seem to have a slight surge, tug, at higher gears in lower RPMs. Give Nick at AR a call and see if he can't help you out. Good luck!
#3
Drifting
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This really sounds like a leak ahead of the front o2s.....even just 1 side will do this. U need to scan to verify, or, grab a length of hose and put 1 end to your ear and pass the other end around each exh.port at the head on both sides while running. Did u use the steel shim gaskets or what?
#4
Melting Slicks
#5
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If its a leak in front of the o2s which is hard to beleive due to the design of the connection to the X pipe. It would be easy to diagnois. Have the dealer tech use his TECH2 scan tool, drive the car and monitor the long term fuel trims, if its leaking he should see the fuel trims skew positive a considerable amount, the reason is that the raw air leaking into the exhaust stream will be seen as a lean condition and the PCM will adjust for this. Also have him monitor spark retard, as you may have some mechanical interference causing noise that the knock sensor is hearing, and is causing the PCM to retard timing.
#6
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Thanks everyone for your help.
Tonight I will check for leaks.
I do remember and wondered why when monitoring the long term fuel trims why one bank read different than the other for example:
bank 1 -4.xx bank 2 -6.xx when cruising. Would this mean bank 1 has a leak?
Thanks again for all your help.
Keith
Tonight I will check for leaks.
I do remember and wondered why when monitoring the long term fuel trims why one bank read different than the other for example:
bank 1 -4.xx bank 2 -6.xx when cruising. Would this mean bank 1 has a leak?
Thanks again for all your help.
Keith
#7
Thanks everyone for your help.
Tonight I will check for leaks.
I do remember and wondered why when monitoring the long term fuel trims why one bank read different than the other for example:
bank 1 -4.xx bank 2 -6.xx when cruising. Would this mean bank 1 has a leak?
Thanks again for all your help.
Keith
Tonight I will check for leaks.
I do remember and wondered why when monitoring the long term fuel trims why one bank read different than the other for example:
bank 1 -4.xx bank 2 -6.xx when cruising. Would this mean bank 1 has a leak?
Thanks again for all your help.
Keith
#8
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There is an easy path to the problem and the solution.
Unfortunately the gentleman who I would have solve this is not a sponsor of this forum so I don't think I can publish his site.
He's my go-to guy, if I had a problem like this.
Bob
Unfortunately the gentleman who I would have solve this is not a sponsor of this forum so I don't think I can publish his site.
He's my go-to guy, if I had a problem like this.
Bob
#10
Drifting
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Sorry to hear about your problem, but its a good thread to let others know that headers can suck and be a PITA. Unless you have an aggressive cam or high boost FI, I see no good reason to get headers - period. 485 rwhp can be had with CAI, intake port job and good tune. I'd bet your headers got you nothing or next to nothing - except a headache and a car that's not as fun to drive.
The solution, as one poster posed, is to go back to stock manifolds.
The solution, as one poster posed, is to go back to stock manifolds.
#11
Le Mans Master
Thanks everyone for your help.
Tonight I will check for leaks.
I do remember and wondered why when monitoring the long term fuel trims why one bank read different than the other for example:
bank 1 -4.xx bank 2 -6.xx when cruising. Would this mean bank 1 has a leak?
Thanks again for all your help.
Keith
Tonight I will check for leaks.
I do remember and wondered why when monitoring the long term fuel trims why one bank read different than the other for example:
bank 1 -4.xx bank 2 -6.xx when cruising. Would this mean bank 1 has a leak?
Thanks again for all your help.
Keith
#12
Le Mans Master
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not sure how the Z is set up, but after my long tubes, i deleted the rear o2's. did they delete them out in the tune? or another known problem is switchin the o2's around. drivers side has to be drivers side ect....
#13
Le Mans Master
I would think it would be throwing a ton of codes if the rear O2's hadn't been deleted yet, or sims put in
#14
Drifting
Sorry to hear about your problem, but its a good thread to let others know that headers can suck and be a PITA. Unless you have an aggressive cam or high boost FI, I see no good reason to get headers - period. 485 rwhp can be had with CAI, intake port job and good tune. I'd bet your headers got you nothing or next to nothing - except a headache and a car that's not as fun to drive.
The solution, as one poster posed, is to go back to stock manifolds.
The solution, as one poster posed, is to go back to stock manifolds.
#15
Melting Slicks
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#16
Drifting
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St. Jude Donor '08-'09
I had AR headers installed with stock exhaust and a k&n filter and now it runs rough at any steady RPM. I have replaced the spark plugs and wires and it still does it. I took it too a local well know tuner and he richen it ,leaned it , retarded timing, open loop, closed loop, and matter what I do can't get rid of surging, nugging, skipping feeling went I'm criusing at a steady RPM and its at all RPMS. So I put the stock filter on and wires back on didn't help. So I took it too the local dealer and they said there were no codes so it must be the headers and I knew they were going to say that. Does anyone have any ideas on what is causing this? Could o2 sensors they installed be connected wrong?
Keith
P.S. One good thing while on the dyno he was able get 485 hp 455 torqe
Keith
P.S. One good thing while on the dyno he was able get 485 hp 455 torqe
This could be it, although it seems it would be throwing some codes.
What header gaskets did you use, factory metal ones?
Headers alone should not cause what you are experiencing.
I had Kooks headers installed on my C5 Z06 before I had a tune and without any other mods, and the car ran perfect. No surging, smooth idle, etc.
Also, at the time you installed the CAI, did you notice any oil in the stock intake or throttle body? Wonder if your MAF sensor has some oil on it?
If it does, this could cause what you are experiencing.
AR headers are good quality headers.
Let us know what you find.
augydog
Last edited by augydog; 10-05-2007 at 10:21 PM.
#17
Drifting
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St. Jude Donor '08-'09
Headers will make the exhausts sound the way they should sound from the factory, also the torque can be felt.
Headers done right, are a joy to behold.
augydog
Last edited by augydog; 10-05-2007 at 10:11 PM.
#18
Former Vendor
Sorry to hear about your problem, but its a good thread to let others know that headers can suck and be a PITA. Unless you have an aggressive cam or high boost FI, I see no good reason to get headers - period. 485 rwhp can be had with CAI, intake port job and good tune. I'd bet your headers got you nothing or next to nothing - except a headache and a car that's not as fun to drive.
The solution, as one poster posed, is to go back to stock manifolds.
The solution, as one poster posed, is to go back to stock manifolds.
At the track if everything being equal [driver, tires and etc], a headers & X-pipe equipped Z06 w/tune will beat a NON headers equipped Z06w/tune EVERY TIME!!!
We have done many headers install and never experienced any drivability issues with the ARH. It's simple, the ARH units are well built and they make power.
Thanks,
Carlos
If your goal is to make 500rwhp, then you will NEED headers period!
Last edited by Myhardtop; 10-06-2007 at 01:48 AM.
#19
Safety Car
The secondary O2 sensors don't matter side to side cause they are after the X in the pipe.I don't use mine and shut them off cause I did'nt want wiring issues.I used factory steel gaskets no problem.Watch your oil cooler lines,they can be trouble.
#20
Drifting
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