98 Leabre: Questions on an issue.
My problems started with the car randomly "jerking" once in awhile while driving. We changed out the wires and plugs and installed a new fuel filter and even changed the ICM and coil parks (I had the ICM and coil packs on hand). We finally determined the Mass Air Flow was bad; and it did set a PO102 code eventually. Changing the MAF did stop the random jerking while driving. I noticed after changing out the MAF sensor that the idle was not smooth and the idle rpm would drop at times. I also noticed the car wanting to hesitate when taking off from a stop once in awhile, not always, most of the time not, but a couple of times on different days I have also seen a PO171 code set for bank 1 lean. I can not find a vacuum leak by doing the carb spray test.
The MAF I have in the car is a Dorman new sensor; not rebuilt, purchased from a local parts shop; ordered and shipped to home. Not sure if I am allowed to mention names of shops. I am wondering if this Dorman MAF is at the issue of the rough idle and the hesitation on pulling away from a stop I am seeing? My friend is wanting to re-torque the LIM and upper plenum bolts but I really don't want to pull the plenum back off unless i know for sure it was leaking at the intakes. The rough idle was not there that I know of until after I installed the Dorman MAF and took it for a drive; I am going to verify this with my friend when I can get him on the phone. I did reinstall the old MAF but did not seem to fix the idle issue.
I could take a video of the live data and post it if it is possible to post videos here. I really need to try and figure out this idle issue with the car.
Last edited by Kimberly; 08-14-2015 at 06:05 PM.