The stft for both is around 0. The ltft around -18%. O2 sensors are new and genuine gm with all reading good voltages. As to oil I did just do a change about 600 miles ago. Not sure about tank pressure voltage but will hook up scanner when I’m home and check. The Fuel Cell Trim isn’t the ltft or stft but has its own pid on scanner. Not sure what it is tbh
Misfires on one bank
- Thread starter Potius
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
mikez71
Full Access Member
- Joined
- Mar 9, 2023
- Posts
- 3,183
- Reaction score
- 3,934
According to google, fuel cell trim is LTFT and STFT combined...
But as usual, the source they link mentions nothing about it!
Might check the fuel pressure and air filter too if you haven't already..
Make sure trims are fairly even bank to bank..
But as usual, the source they link mentions nothing about it!
Might check the fuel pressure and air filter too if you haven't already..
Make sure trims are fairly even bank to bank..
Do you mean "Fuel Trim Cell?"
Yea sorry
Can’t see tank pressure voltage on scanner or anything similar. Steady felt misfires still on cylinder 4 and now 3 only at idle and no CEL. Got curious today and unplugged MAF and restarted the truck and there was no misfires at all. Could it be as simple as the MAF which I’ve been hesitant to change?
Could be a bad MAF, I have seen them cause a whole host of seemingly unrelated codes and problems, shifting problems, misfires, lean codes, 02 codes.
even though they "seem" unrelated bad maf data can cause the whole thing to go goofy.
my experience in general has been if it has 160k on the maf it's end of life and should be replaced.
