Fuel pressure checked by dealer said to be ok.
Oil level is ok, checked by me.
Cylinder compression, 3 cylinders at 190 PSI and other 160 PSI, checked by me.
MAF sensor cleaned by me before it went to dealer. Dealer said they checked it out, ok.
Cam timing, Dealer checked and said its ok.
Engine wear, less than 30K mileage on new long block.
thanks for your input.
Originally posted by Tony2005:
Some reasons for running rich
From TSB,
The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The code sets when the adaptive fuel tables reach a lean calibrated limit.
Fuel System:
�· Excessive fuel pressure
�· Leaking/contaminated fuel injectors
�· Vapor recovery system concern
Base Engine:
�· Oil overfill
�· Cam timing concern
�· Low cylinder compression
�· Excessive engine wear
Powertrain Control System:
�· PCM concern
Induction System:
�· MAF contamination
I would suggest cleaning the MAF first and this is the cheapest thing to do.
MAF cleaning.
http://www.contour.org/mods/mods.php?s=howto&displayid=36
and
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=zetecmaint&Number=989728&page=&view=&sb=5&o=&fpart=1&vc=1
and from Autozone. In addition, you don't need to remove the clamp next to the upper air filter housing. Just spray through the housing. You do need to remove the clamp between the MAF and Inlet Air Duct (accordian tube?)
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/cb/25/0900823d801bcb25.jsp
