PATA

1989 240 stalls after driving about a mile. The idle is not steady, it fluctuates up and down. After cools it starts up but repeats problem.

magoogle

Hello, if I was you I would get a fuel pressure reading, at this point I would be leaning toward a stooped up fuel filter or a weak pump.

magoogle

One more thing, check your catalytic convertor. start the car and go to the tailpipe and get a idea on you exhaust flow. Pull your dipstick and smell the oil on it, if it smells real gassy or strong like exhaust. Then you have a a exhaust problem.

RVMAN

Good advice from magoogle...add to that, possible fuel pressure regulator. To trouble shoot, make sure both fuel pumps are ok.(start with fuses first, then see if they are putting out proper pressure to the injectors) If your filter is not new, this could also cause low pressure, and is the least expensive to change. Good luck.