Computer codes are o2 sensor lean mixture and EGR system fault. Have replaced O2 sensor and EGR valve as well as plugs and wires to no avail. Also replaced a couple of worn vacuum lines. The car will eventually reach speed but bogs during acceleration(when I really need it in heavy traffic). Any help would be appreciated guys. Thanx, Ron
I've had a similar probl. Check all vac lines. Also check the iac control valve. Could also be a leaky intake manifold gasket. Running lean means too much air or not enough fuel. Maybe also injector not working right. It's a real bugger to find. Aside from low power does it hesitate at all? If so another culprit might be worn valves or blown head gasket.
I have not checked the IAC control valve yet and all vacuum seems to be alright. I've replaced almost all except for the 5/32 hard plastic vacuum pipe.Also replaced the MAP and TPC sensors with no luck. Yes, it hesitates as well. The injector looks to be working at a glance in park. Idling and throttling. Thanx for this and any help Cage.
P.S. I had a problem with it over-heating alot earlier this year(bad fan motor).
Have you done a compression check on the cylinders? If it got hot it could have warped the head or burnt a valve causing bad compression. Another thing could be the temperature sensor. It regulates how much gas is being put out of the injector.
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