Quote:
Originally Posted by Mr4
I just bought a 92 3000GT VR4 for my son, and it seems to be suffering from this exact problem (misfiring in the 2-3k rpm range). The person I bought it from just had it serviced for it's 60,000 mile service (done at ~67000 miles) and states that the car was running beautifully. She drove it for another 4000 miles after the service and said it was great. She parked it in her garage and didn't drive it for almost a year. When she decided to sell it she noticed that it had a bad hesitation, backfiring and the like in the 2k to 3k rpm range. A friend though she should change the fule filter since it had been setting so long without running. That did not seem to fix the problem.
We came along and bought the car, thinking the problem was simple and could easily be fixed. We took it to our friend, a good mechanic, and he spent 3 days solid only finding one problem with the idle motor, which was showing problems, including a vacuum leak. Changing that did not fix the misfiring in the 2-3k range. He tested the spark and found that in the bad range it misfired randomly, not on the same cylinders.
Bottom line is that I have a great car that runs like crap and after seeing this site, I am wondering if it can ever be fixed. I am planning to take it to the dealer, who has better analyitical equipment than my friend to see what they can find.
Has anyone solved this problem???
Please help.
Mike
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If you go to the dealer I can almost 100% guarantee you they are going to want to replace the ECU. Don't let'em. They will replace it with an ECU with the same faults that will reappear later on. Send the ECU off for repair and have'em work the whole board... capacitors, traces, drivers, etc... put it in writing. Sometimes though this doesn't resolve it for everyone, but most of the time it does. To see what has fixed other's 1st gen VR4 problems click the hesitation thread in my signature.