1998 Mercury Tracer 4 cyl Front Wheel Drive Automatic 79000 miles
I purchased a used Tracer GS last year and since I got it, it’s had a low idle. After I purchased it I had a local (trusted) mechanic have a look at it and he said everything was fine apart from the thrust motor mounts (front and rear) he also mentioned the transmission mount should be replaced, a small leak in the a/c compressor and he had some concerns about the low idle. We recently had the A/C compressor and the thrust motor mounts (not the transmission mount) replaced and the low idle turned into a very rough idle. The entire car would shake quite badly when using the A/C while in Drive but not so much in Park or even in Reverse it’s much less! This shaking will die down quite a bit when I turn the A/C off, I’m in Florida so the A/C is critical! Although driving without the A/C is now very smooth compared to before.
I asked him to double check the car again and he flushed out the A/C system and increased the idle slightly. He showed me how he increased the idle and the screw used to make the increase is rusted in place so I’m stuck at what I’m at. He said the car did stall once as he was taking it around the block before increasing the idle. The car still shakes quite a lot when stopped but 100% file while driving? I sat in the car as he manually increased the idle with the A/C on and the shaking disappeared? He also checked all the usual, fluids, computer for codes, he actually showed me the results as he searched for an error codes. There where no errors reported from the computer.
Is there something else that’s missing? Something obvious that a more seasoned mechanic might have spotted that our mechanic hasn’t seen too much before or at all before in the shop or is our mechanic on the right track?
Thanks for your help!
Tuesday, May 13th, 2008 AT 10:39 PM