Running Rich. Ideas?
05-26-2016, 05:13 PM
#1
Safety Car
Thread Starter
Running Rich. Ideas?
I noticed a while back that my average MPG had dropped a couple mpg (both in the city and highway). I don't recall it being a sudden drop. Air filter, plugs and wires are not the culprit. When I logged the car, I noticed my LTRIMs were running pretty consistently in the -8 to -10 range in both banks. I looked back at a log from when I last tuned the car (several years ago) and they were pretty spot on.
Car has LG headers with cats and a mild cam. It was tuned on a MAF only basis so unfortunately I can't switch to speed density and see if the LTRIMs return to normal and rule out a MAF problem. Mileage is a bit over 40k.
Could this be bad O2s on both sides? Any way to visually tell if they are bad? cats gone bad?
I'm looking for ideas on things to check.
Car has LG headers with cats and a mild cam. It was tuned on a MAF only basis so unfortunately I can't switch to speed density and see if the LTRIMs return to normal and rule out a MAF problem. Mileage is a bit over 40k.
Could this be bad O2s on both sides? Any way to visually tell if they are bad? cats gone bad?
I'm looking for ideas on things to check.
05-26-2016, 09:19 PM
#2
Race Director
Member Since: May 2004
Location: Raleigh, NC
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St. Jude Donor '15
Clean MAF, change O2 sensors, see what happens. Not unusual for FT's to change some. Different weather, different fuel blends, etc.
Last edited by schpenxel; 05-26-2016 at 09:19 PM.