Having another problem with my 1993 Grand Voyager with a 3.3. No fault codes other than a 12.
Sometimes while waiting at a signal, the idle speed will increase for a second or two, causing the vehicle to lunge forward to the unsuspecting driver.
It has also done this when slowing down too.
It does it with the A/C on or off, so I don't believe that it is the idle speed being adjusted to compensate for the A/C compressor coming on.
02 sensor was replaced, along with the throttle body being cleaned
3000 miles ago.
Any ideas welcome. After having had the transmission rebuilt last week, I don't want any other expensive repairs.
Thanks,
KM