David Smith
Member
I recently purchased an 01 ST with 49kK miles and I love the vechile but have encountered a problem that has not been resolved. I installed a K & N FIPK on the vehicle in late Feb to help with the gas milage of the 4.0. Then in early March it developed what can best be described as a stumble when you have the cruise control engaged and are going down a grade. The rpm and speed stay constant but the truck feels like it has a miss that even my wife notices as a passenger. The check engine light did not come on at this time. Took it back to the dealer and it had a pending code of 0101 so they replaced the mass air flow sensor and replaced a vaccum hose assembly. This took care of about 50% of the problem and I drove it for about 4 weeks until I got a check engine light to come on. Took it back to the dealer and it had a 0402 code so they replaced the DPFE sensor this time. I drove about 150 miles with no problems and now the hesitiation or stumble is back as bad as it was the first time I took it in So I am out about 450 bucks and still have a drivability problem with the truck
Any suggestions on where to look, I am about ready to purchase a scan tool that will capture live data and see if that will help diagnosis this issue.
Thanks for any help
Any suggestions on where to look, I am about ready to purchase a scan tool that will capture live data and see if that will help diagnosis this issue.
Thanks for any help