turbo backfiring at 3500 rpm under boost
05-20-2019, 06:13 PM
#1
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turbo backfiring at 3500 rpm under boost
Like the title says, my car is backfiring starting at around 3500 while in boost. I have an MK turbo kit. haven't had any issues with it other than this. Only seems to sputter and backfire under boost. I have a fab9 tuning coil on plug kit running denso IK22 plugs, MSPNP2, flowforce 640cc injectors, flex fuel sensor. I usually run around 50% ethanol (because Iowa) and 91 on the other 50%, if I can find 93 I will run 100% of that. I pulled the plugs today and they looked good, not fowled or anything like that. AFRs look good, low to mid 11s under boost. only running wastegate pressure right now until I get this fixed. Any help is appreciated, thanks!
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05-20-2019, 06:24 PM
#2
Like the title says, my car is backfiring starting at around 3500 while in boost. I have an MK turbo kit. haven't had any issues with it other than this. Only seems to sputter and backfire under boost. I have a fab9 tuning coil on plug kit running denso IK22 plugs, MSPNP2, flowforce 640cc injectors, flex fuel sensor. I usually run around 50% ethanol (because Iowa) and 91 on the other 50%, if I can find 93 I will run 100% of that. I pulled the plugs today and they looked good, not fowled or anything like that. AFRs look good, low to mid 11s under boost. only running wastegate pressure right now until I get this fixed. Any help is appreciated, thanks!
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05-20-2019, 10:08 PM
#6
Cpt. Slow
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Depends on your year car. For any car EXCEPT 99-00, OEM with gapped plugs and new coils/wires. For 99-00 (or any other year but especially 99-00), TSE’s cop kit is the most complete/easiest/cheapest on the market .
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