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bad backfire after plug replaced

This is a discussion on bad backfire after plug replaced within the General Help forums, part of the LSx Technical Help Section category; I am working on a completely stock v6 camaro just replaced fuel pump and put new wires and plugs in. ...

  1. #1
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    bad backfire after plug replaced

    I am working on a completely stock v6 camaro just replaced fuel pump and put new wires and plugs in. It had a back fire and ran real rough when cold so changed plugs and wires and now it is even worse any ideas? The back fires sound more like a pop when just revving it.

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    Further more the plugs are just the cheap copper one's and it is a 2001

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    Waiting on the Tree transamtom's Avatar
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    NBM
    1999 TA A4

    Maybe the timing chain jumped a tooth?
    2010 Camaro SIM 2SS/RS A6
    1999 TA A4 NBM
    12.265 at 110.52mph

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    Black/ Silver
    98 TA WS6/ 01 C5 Corvette

    Do you have any codes?
    1998 Trans Am WS6 - Phantom
    421 CI LQ9, Tick Performance Custom Cam, TFS 255cc LS3 heads, Kooks 2" LT headers, Kooks 3" True Duals w/ high flow cats, FTP 104 lid, Speed Density Tune, 4" silicon tube, LS6 VCT, FAST 102 Intake, NW 102 TB, Oil Catch Can, SLP Bilstein Shocks w/ Vogtland Springs, CTS-V 4-piston Calipers w/C6 Z06 rotors, Stainless Steel Brake Lines, R1 concepts premium rotors, Hawk HP+ brake pads, VFN WSQ Hood, C5-R timing chain, SLP oil pump, E85 tune, Walbro 450 fuel pump, Deatschwerkz 95# injectors, Breathless performance headlights, Frost Tune, !HVAC.
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    Former Mopar Man 2002ssslp's Avatar
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    02 Camaro SS, 04 GTO

    Need codes, need codes.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
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    It is not giving any codes.......

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    Moderator 35th-ANV-SS's Avatar
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    02 35th LE Camaro SS

    Have you checked fuel pressure?
    It's on jackstands.

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    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    We need mileage as well. Are the plug wires on tight? Did they click when you put them on?

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    So i used copper plugs ether the car dose not like them or they where dropped by the store at some point i changed to the fine wire plugs and it cleared everything up.

  10. #10
    Moderator 35th-ANV-SS's Avatar
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    02 35th LE Camaro SS

    Glad it was an easy fix.

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    Yea me to considering its a customers car! now for my brothers Dodge Commons with a runaway throttle problem and i'm not talking miner ether over rev to 4300rpm with a red line of 3200. Has any one noticed everyone's shit is going to hell?

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    I wont to thank every one on hear for the help i know my spelling and grammar is shit and i catch a lot of hell for it on the other Forums but all of you guys where fantastic! great bunch of people really thanks!

  13. #13
    Waiting on the Tree transamtom's Avatar
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    NBM
    1999 TA A4

    Good to hear it was something simple.

  14. #14
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    Good to hear.

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