This bulletin applies to RS vehicles equipped with a 3.3L or 3.8L engine (sales code EGA, EGH or EGM) and a EGR valve. EGR valves were installed on all 2001 models and some 2002 models.
The vehicle operator may experience a surge. This conditions is more noticeable at 40-50 mph with the transmission in full lock-up on a slight incline under heavy load.
Using a Scan Tool (DRBIII(R)) with the appropriate Diagnostic Procedures, verify all engine systems are functioning as designed. If DTC's are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the customer describes the Symptom/Condition
CAUTION:These service only PCM's and TCM flash should only be installed to fix this exact condition.
Replace the PCM
This PCM and TCM flash should not be installed for any other purpose.
Also another thing you may check is
Hook van to scanner and check if its down shifting when forced under load
as tranny may getting stuck in higher gear bogging down engine up hill or forced down shift
Saturday, July 25th, 2009 AT 5:59 AM