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  1. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    update: issue is fixed, i didnt really push the car, & i dont plan on pushing it but it runs so much better, & just merging on to the freeway it felt perfect, it feels like a totally different car now, i will definetly get it checked & retuned, i havent checked for the chip in the ecu but i...
  2. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    i think i found my issue… i replaced them with tr6s & gapped them @ .28 & im about to test drive it, im honestly shocked they melted… ive nver seen it happen, when i took off the plugs i sticked a magnet & just dust came out, ill update once i drive it
  3. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    should i try gapping the ix plugs first? or just get the tr6s & gapping them like you mentioned?
  4. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    thers nothing behind the carpet either, so no bap right?
  5. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    i just unclipped the side kick panel & nothing looks off, ill tke the computer off in a bit, & see how it looks. but heres how it looks without disconnecting it. the blue wires are rcas, & the red & black wires are for the rear speakers, it looks like they took off the black bracket next to...
  6. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    the power wire is for amps that i havent installed yet, its not connected to nothing. i checked the fuel pump cutoff switch location (i believe thats where people wire the bap) & there wasn’t nothing, but where else should i look forin case im wrong? ill check on the computer, how exactly should...
  7. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    it had a small misfire when i bought it, it got fixed when i replaced the spark plugs & cop, but its been doing this where it hesitates & backfires ever since i got it, i thought the spark plugs & coil on plugs would fix it but it didnt, but it does misfire super rarely, it smells like just pure...
  8. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    yeah, i just bought the car like a month ago, i put new fluids in the motor obviously, supercharger, & trans, did coolant flushes, replaced all 8 spark plugs with ngk tr6ix (i believe) & all 8 coil on plugs with motorcraft ones(sorry i didnt specify), its been through plenty full of fresh...
  9. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    yeah, nothing major, the clutch cable snapped on me last week & that was a shit show lol, ill for sure mesure the pulley, i honestly thought it was the oem one
  10. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    yeah im probably going to invest in one of those
  11. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    yeah, it feels like that lol, im on 93 still, the car is still pretty stock, im trying to get a handheld tuner so i can diagnose better but the only issue is $$$ lol, im still new to this & honestly every opinion is helping me, i dont know no one yet who could help me locally, im 18 & i most of...
  12. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    its got the oem pulley, would it be okay?
  13. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    for sure, ill be doing that today, i might go buy a harbor freight scanner just so i can read live data, ill look for the plugs, they honestly didnt look bad, once i get home ill take some pics
  14. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    i bought the car from some older gentleman who let it sit for like 8 years, it needed the battery & alternator wasnt charging, spark plugs were the oem ones, & 2 coil on plugs werent working, but i did panic & bought the frps honestly lol
  15. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    i left them how they were out of the box, i thought you werent supposed to gap iridium plugs, but i could be wrong
  16. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    its just got bolt on mods, bbk 65mm throttle body, stock maf, cold air intake, & exhaust, supposedly the previous owner told me it was tuned, dont know with who, where, theres no dyno sheet, he didnt really remember either, i replaced the alternator & battery, ill do my best to try & find...
  17. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    i dont man, ill try to find someone who could let me borrow their tuner or something, i bought the fuel filter but i havent replaced it yet
  18. rubior

    03 Cobra hesistates/ backfires under wot or above 4000 rpms

    Hey guys i was wondering if i could get some opinions on my issue, when you give it 3/4 throttle or full throttle it starts bucking, hesitating & backfires, & if your idling & step on it it literally cuts at 3000 ish rpms, hesitates & backfires & the rpms slowly go down, i replaced the spark...

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