My delima:
My wifes lexus has slowly been calculating the miles. It is currently at 332,930 and has ran fine until last week. She said it had problem and when she got home, sure enough it did. It had a horrible mis, probably worse I've heard. The code was saying misfire on 2,4 and 6. I was hesitant due to the cost but I went ahead and purchased and replaced all three. Go figure, no difference.
Ran the codes again and it showed:
P0021 cam position 'A' too adv/system performance b2
P0051 afr/o2 heater control circuit low b2-s1
P0101 maf/vaf circuit range/performance
P0226 throttle/pedal position sensor/switch 'c' circuit performace
I have now replaced the camshaft postion sensor, mass air flow sensor, new plugs on front side that I previously (yesterday) replaced coils on, and I cleaned the positive battery connection because of its corrosion.
Lastly was the MAF. When the car is started (cold engine) it seems to be ok, no check engine light after new part install. After I drive it for a little while and it warms up it will start "pulsing/mising" at interstate lower rpm speeds. When I stop it is mising like crazy, doesn't even sound like the same car! The CEL comes back on when the symptoms start back.
Thank you for any help to fix this!
Aaron
