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Like the title says, I have a '97 Kenny Brown bird w/ 60k miles. A Vortech S-trim blower and some other goodies. She has a hard time at idle, like it's misfiring, and also below 2k rpm on the highway. Fuel mileage is crap, about 150 miles to 3/4 of a tank. I had the codes pulled yesterday and got the following results:
PO171, PO172, PO174, PO175.
PO171 bank 1 (cylinder1) and PO174 bank 2 indicate the fuel/air ratio is too lean. The fuel trim system is a the rich correction limit.
PO172 bank 1 and PO175 bank 2 indicate the fuel/air ratio is too rich. The fuel trim system is at the lean correction limit.
After reading that, it confused me a little bit. How can it be running lean and rich at the same time? Am I looking to deep into the problem, making it harder than it seems? After the codes were dumped the car ran fine until the comp figured out something was out of whack. I'm guessing (and I could be completely wrong on this) 1. bad injector 2. vacuum leak 3. bad plug/wire 4. bad EGR. Injector were replace w/ 30# injectors back in July, plugs and wires aren't much older....I guess that doesn't really mean anything though.
Please give me a starting place, so I can chase some gremlins.
Thanx for the help in advance.
Dan
PO171, PO172, PO174, PO175.
PO171 bank 1 (cylinder1) and PO174 bank 2 indicate the fuel/air ratio is too lean. The fuel trim system is a the rich correction limit.
PO172 bank 1 and PO175 bank 2 indicate the fuel/air ratio is too rich. The fuel trim system is at the lean correction limit.
After reading that, it confused me a little bit. How can it be running lean and rich at the same time? Am I looking to deep into the problem, making it harder than it seems? After the codes were dumped the car ran fine until the comp figured out something was out of whack. I'm guessing (and I could be completely wrong on this) 1. bad injector 2. vacuum leak 3. bad plug/wire 4. bad EGR. Injector were replace w/ 30# injectors back in July, plugs and wires aren't much older....I guess that doesn't really mean anything though.
Please give me a starting place, so I can chase some gremlins.
Thanx for the help in advance.
Dan