2010 Silverado -15 ltft help

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volk
Posts: 18
Joined: Sun Mar 27, 2011 12:21 pm

2010 Silverado -15 ltft help

Post by volk »

2010 Silverado 5.3 lc9. Tune in my truck has been great for over 3 years but now my ltft are -15. And exhaust pipe is black. No codes are set and no misfires at all on tech 2. I don’t want to adjust anything due to this rich condition since it runs great. Possible maf , air filter is new. Truck only has 53000 miles. Any ideas what I can do
Thanks again
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mikel
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Re: 2010 Silverado -15 ltft help

Post by mikel »

nothing changed and suddenly the trims are -15 at cruise?

If so its tough to say if its MAF or O2 related, but if its both banks, MAF seems most likely.
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volk
Posts: 18
Joined: Sun Mar 27, 2011 12:21 pm

Re: 2010 Silverado -15 ltft help

Post by volk »

I just replaced maf with oem and I’ll put some miles on it and check but after warmup the numbers have got better. It had no misfires and both banks were average -15
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06MonteSS
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Re: 2010 Silverado -15 ltft help

Post by 06MonteSS »

Get a can of CRC Mass Airflow Sensor Cleaner and spray clean the MAF sensor.... and make sure you re-install it facing the correct direction... and that all connections/clamps are TIGHT so no air leaks anywhere....
06MonteSS / DiabLew Tune
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