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Have you actually replaced, and or tested the front O2 sensors yet? Also, could there be a clogged pre-Cat?
Have you actually replaced, and or tested the front O2 sensors yet? Also, could there be a clogged pre-Cat?
Ok, if the vehicle seems to have plenty of power when it isn't missing it most likely isn't the cats, if the cam sensor is out it can set a number 1 and number 4 misfire code. you need to find someone with a DRB III scanner to check the correlation, the cam sensor sets the injector timing and if it isn't at zero you could have a problem there.
I still vote for the front 2 02's
Interesting idea, X2 on that for sure! I think he said he replaced it, but is set properly?
I agree, so its back to O2 sensors or sticking fuel injector, or both.
Suggestion, the next time the CEL is flashing, disconnect the fuel injector electrical on #4 and see if it stops flashing?
You add the 2 together on each bank, should be under 10 for each bank, should be around 0.
Say bank one is 12.4 and 7.3, that equals 19.7, that bank is seen as way to lean.
If your trims are on the positive side that means it is adding fuel to compensate.
Bank 2 looks really good, i would say the bank 1 sensor 1 O2 is bad
Suggestion, the next time the CEL is flashing, disconnect the fuel injector electrical on #4 and see if it stops flashing?