This has never before happened with this car; the car was hesitating
very badly today after driving about 10 miles, and although it got a
little better the rest of the day, it still hesitates a little from
time to time, and the check engine sign comes on for a second, then
goes away - comes on for a second, then goes away for a few minutes,
then comes back on again, as the engine hesitates/lurches for a second
or two, then runs okay again.
This summer it was parked for six weeks at my mechanic, who worked on
other things (rear wheel bearing); but this car needs to be driven
regularly, although not too much, since it already has 175,000 miles
on it. Once I picked up my car a month ago, the car was stalling/
hesitating when starting (this also had never happened before); the
mechanic told me to add STP fuel system cleaner, twice, which I did,
and that seemed to take care of it, and it's been running fine the
last couple of weeks. I don't know if today's problem is related to
the earlier one.
Please help me! What could this be?