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installed headers over the weekend, checked the firing order and firing order looks right. pacesetter long tube, plugged off the emission air pipes and now cant go over 50 without misfiring and back firing through exhaust
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Check your spark plugs tend to crack when swapping headers2011 Ford Raptor SuperCrew
SVT Beadlock Wheels
Roush Intake, Corsa Exhaust
20" and 40" Light Bars
2000 Camaro Z28
Stripped Down Drag Car Build
Project 1999 Camaro Z28
2009 G8 GT Stryker Blue Metallic-SHEGONE
Crate LS3, LS9 Cam, LSA Supercharger, Metco Solid Isolator
RotoFab Intake, HSRK, Camaro Trans Pan
ZL1 HX, ZL1 Fuel Pump, CTS-V Lid, LSA Injectors
Pat G - 93 Octane Tune
Kooks 1-7/8" Longtubes, High Flow Cats, X Pipe, Solo AxleBacks
CTS-V Calipers, Brembo Pads
H&R Lowering Springs, Whiteline Bushings, FE3 Struts/Shocks, Camaro 20" Wheels
HIDs, LED Conversion, Atari Gauges, Tint, Roof Carbon Fiber Wrapped, Innovative Wideband
2.55 Lingenfelter Pulley and Injectors waiting to go on!
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replaced plugs after installing headers, but stock plug wires they have the metal protectors around plug wire that come close to headers...Comment
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Replace the plug wires. Either use the stock wire loom things or get some aftermarket ones to keep the wires away from the headers. Sounds like you have some heat damage to a couple wires. Does it misfire a little at idle too? Get worse when the car warms up?Originally posted by killa89trans View PostNick H.
Current MIFC Vice President
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Sounds like a lean pop situation
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1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily DriverComment
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check your wires. if they are burnt or oil soaked youll get a small miss. happened to a friend of mine. one was was soaked with oil or whatever and wasnt giving a strong spark and we didnt notice until we rplaced just about the whole ignition.91 Trans am, 305, Lt1 cam, 24lb injectors, headers, SLP LM2, SW chassis, massive panhard, lowered, modded TPI, Tuned, 4.10s, Lincoln locked
85 Z28 406/th400?/3.42 4th gen disc rear/4th gen dash
00 Tahoe Z71........Stock
97 K1500 lt4 cam, 1.6s, MPFI, Solid axled, IROKs,------winter beaterComment
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alright, any specific wires to order that are a little longer then stock to keep away from headers? misses at idle and as the load increases it gets worse. sounds like 55mph back fires through exhaust but could be a lean pop...Comment
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also need to order o2 wire extentions, any recommendations? can i get from part store?Comment
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If you're running w/o o2 sensors, and it wasn't doing it before the headers, I'd bet on lean pop. The computer doesn't know where to put the fuel trims, and stay away from getting heavy in the throttle. You're PE is probably lean - don't want any holes in the pistons!
1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc
2006 Saab 9-7x 5.3i Daily DriverComment
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alright, spliciing into o2 sensors tonight and seeing if it runs any better and re-check the plug wires for damage. hopefully its just due to no oxygen sensors hooked upComment
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problem fixed, 2 plug wires were backwards, and plugged the o2 sensors in
runs like a champ... cant really notice much difference except the little extra at low end
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