My daughter has a 98 Pontiac Grand AM....2.4 lt engine....about 83,000 miles on it.
It is having a problem with intermittent stalling.
I replaced the spark plugs and cleaned the idle air control motor. It didn't stall for a week..then started stalling again.
I replaced the idle air control motor. It didn't stall for a week.
I replaced a defective vacuum line from the throttle body to the map sensor and replaced the fuel filter. It didn't stall for about two weeks....thought I had found the problem.
It is back to stalling....several times a week. 75% of the time it stalls when it has been driven a short distance....perhaps a few miles....so the engine is warmed up...shut off....come back 10 minutes later....like after running into a store...when she restarts it, puts it in gear, steps on the gas to go....it stalls. Usually, it restarts no problem.
25 % of the time it stalls after a cold start....brief warm up...put it in gear to back up....and stalls.Any suggestions?