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problems again
Well got the car running good for about a week and now I have new problems.
2 days ago I noticed my long term fuel trims were starting to go lean again and then rich on both banks. For example yesterday mroning when I started the car the fuel trims were -2.3% and then the longer I drove the trims were about 2.3% lean, when I left for lunch the fuel trims were 6% lean, when I left to go home they started out at -23% rich and were about 4% rich by the time I got home. This morning when I started the car the fuel trims were 19.5% lean and they slowly went down to 7% by the time I got to work. This morning I also threw the p0420 cat low efficency.
I just changed my CAT last summer, would a bad CAT cause my fuel trims to do this or is it a dummy code caused from something else?
When my EGR was leaking vacuum at the intake I never threw that code and my short and long term fuel trims were at a constant 19.5% lean.
If I had another vacuum leak wouldn't the trims stay lean constantly?
2 days ago I noticed my long term fuel trims were starting to go lean again and then rich on both banks. For example yesterday mroning when I started the car the fuel trims were -2.3% and then the longer I drove the trims were about 2.3% lean, when I left for lunch the fuel trims were 6% lean, when I left to go home they started out at -23% rich and were about 4% rich by the time I got home. This morning when I started the car the fuel trims were 19.5% lean and they slowly went down to 7% by the time I got to work. This morning I also threw the p0420 cat low efficency.
I just changed my CAT last summer, would a bad CAT cause my fuel trims to do this or is it a dummy code caused from something else?
When my EGR was leaking vacuum at the intake I never threw that code and my short and long term fuel trims were at a constant 19.5% lean.
If I had another vacuum leak wouldn't the trims stay lean constantly?
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