Results 1 to 20 of 32
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01-18-2011, 07:29 AM #1
my are in headers but it dont run right now
so i just put 1"3/4 to 3" long tubes headers and a 3" y on my ls1 but on the way home it started running like crap back firing when i would put it down could this be cause i dont have rear o2s off yet?
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01-18-2011, 07:45 AM #2
- Join Date
- Feb 2010
- Location
- north bay california
- Age
- 34
- Posts
- 2,973
Black- 00 camaro ss M6 #6695
You Have to tune your PCM.
00 ss blk m6 " STOCK" strano springs, slp bilstein shocks, adj LCA, adj panhard bar, relocation brackets, 2 point SFCs welded,OEM zo6 rims black, magnaflow exhaust, CME exhaust,E/cutout, slp grille, custom front plate mount, HIDs, whistler mod, side moldings delete, slp air lid, ported and polished TB, strut tower brace, 3.73s gears, and some other parts to list!
next to come,4.10s,ls7 clutch, ms3 or 228r cam, ported 243s, ls6 intake, ls6 oil pump. ls2 timing chain, longtube headers no cats, with a tune..
02 tahoe Z71 blacked out
00 jeep grand Cherokee limited on 22s.
07 Dodge Charger R/T Inferno Red, Sold
98 z28 red m6 sold
07 zx6r ninja flat/black sold
08 zx6r ninja sold
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01-18-2011, 07:52 AM #3
definitely an issue there with the install. Are your front O2's hooked up? Check for cracked plugs or plug wires that weren't installed all the way.
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01-18-2011, 08:52 AM #4
yeah it has front ones they are new they are 13111's but yeah no tune yet so it had plenty of power in first but at low rpm's and i get oln her it starts doing it but i stll will burn um with no problem in first
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01-18-2011, 09:06 AM #5
The headers alter the airflow characteristics through your engine so your Volumetric Efficiency (VE) table is now off. However, it shouldn't run that bad. Like 0rion said, it sounds like you have something else going on. Any SES codes popping up? Was the battery disconnected during the install? Are the plug and coil connections fully seated -- 1 click on the plug and 2 clicks on the coil?
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01-18-2011, 09:09 AM #6
i didnt unhook the battery i didnt think i would have to..it wasnt that bad till i got on it after driving it about 4 or 5 miles but it never really got that bad
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01-18-2011, 09:11 AM #7
- Join Date
- Jan 2010
- Location
- East of Cleveland, Ohio
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- 3,827
Black- 99 WS.6 - Modified
Agree with checking ^. Also, you might want to check your header bolts and connections to make sure they are all tight. Make sure the header gaskets are good as well.
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01-18-2011, 09:18 AM #8
well i just went out there and 3 wires were loose 2 of them went on 2 clicks the other was loose on click all on the coil end. think that was it?
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01-18-2011, 09:22 AM #9
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01-18-2011, 09:24 AM #10
yeah but i dont wanna drive it on these salty shity roads im in wi lol
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01-18-2011, 09:26 AM #11
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01-18-2011, 09:37 AM #12
So you were basically running on 6 cylinders...I would say yes, that was your issue.
Like mentioned, after a LT install, a tune is NOT a necessity, but recommended.
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01-18-2011, 09:49 AM #13
i hope that was it
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01-18-2011, 01:56 PM #14
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
sounds like you found the problem. the other possiblity that came to my mind was a O2 sensor wiring melted against the headers.
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01-18-2011, 04:29 PM #15
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01-18-2011, 04:49 PM #16
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01-19-2011, 10:07 AM #17
well i went out and looked from what i could see out there in the snow everything looked ok but its not up in the air so its kinda hard to see but it looks fine
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02-17-2011, 09:43 AM #18
- Join Date
- Aug 2005
- Location
- Papillion, Ne.
- Age
- 67
- Posts
- 11
Marina Blue- 1968 Chevelle SS396
Somewhat the same problem
I have somewhat the same problem after installing LT's and ORY. I only have the front 2 O2 sensors and car seems to run fine but it has a flat spot and it sucks the gas and pops real loud when letting off the pedal. Since I have the SLP loudmouth exhaust I'm assuming I need a muffler to add a little bit of back pressure. New plugs and everything hooked up properly! The car is a 1999 Z28 with a 6 speed manual tranny.
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02-17-2011, 10:47 AM #19
i think i might of found the problem on mine i have a cracked plug on the porsolin part i havent got one yet to see if that fixes it, but that worries me now cause it looks like it was burnin fine. but i under load is when mine acts funny if i give it (wot) it pops loud and just dont have the power it did. like at 40 mph in 4th if i give it a little gas it sounds like its out of gas by the way it pops and feels. after i did the the car seems to shake a little more that it did..
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02-17-2011, 04:17 PM #20
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