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Thread: Cargoing lean at 5200 rpm, Need help Please

  1. #1
    Tuner in Training
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    Cargoing lean at 5200 rpm, Need help Please

    Hi everyone, I have a 2010 SRT challenger, procharger, Fore return style MAP referenced, 95 lb inj. I had it tuned a few months ago and they are unresponsive so I am asking for someone to check out the log to see if you can find what my issue is. The car runs good up to around 5200ish rpm's then goes lean and sputters, seems like backfire. In the log attached about1:09 you can see fuel flow rate goes from 260 t0 10 lb/p hr and it leans out. Im not sure what the cause is. Could be motor,sensor, tune? No codes. I have since changed plugs, TB, checked coils, added fuel pressure gauge. I've got the car sold, unless I cant get past this.

    Thanks in advance
    Attached Files Attached Files

  2. #2
    Senior Tuner SultanHassanMasTuning's Avatar
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    check your plugs it could be missing

    the whole tune seems off as your VE is setup like its NA in efficiency
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  3. #3
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    I replaced the plugs on Saturday

  4. #4
    Senior Tuner SultanHassanMasTuning's Avatar
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    which plugs and gap?
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  5. #5
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    NGK Iridium 2315 .035

  6. #6
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    Hey Sultan, Thanks for the tip, I rechecked the plugs and gap was .045-.050. Changed to .032. Running much better now. Thanks

  7. #7
    Senior Tuner SultanHassanMasTuning's Avatar
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    great...
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  8. #8
    I haven't studied your problem but I can tell you I run my plugs at 030 gap on my jeep with the F1A procharger runs happily with 15 lbs no misses
    Also the tune you have posted looks very odd to me like a bunch of band aids or plasters , I would suggest you find another tuner
    Last edited by Nigel Pitsch; 07-01-2020 at 09:21 PM. Reason: after looking at the tune