I bought my 86' 240 several years ago and had some intermittent drivability issues. Under load it occasionally would fail sputter hard, but not quite stall--or perhaps I didn't wait long enough before easing into her. Sometimes it wouldn't go above fifty--especially under heavy acceleration. Being young and foolish, I replaced both fuel pumps, the wiring harness, and in the end, it was the Air Mass Meter. That said however, I am now having nearly an identical problem.

(Note: unlike last time, I am now on the East Coast and the weather is near-zero degrees.) I just had both fuel pumps replaced--again, this time they definitely failed--and so I'm wondering if I'm missing something? When the car acts up--usually only if it's only been running for the first time in the day--if I pull over and restart the car, it then works fine. (Recent replacement of fuel pumps may be unrelated--as I installed them the first time and likely did a poor job.)

For the record, my car just had a major tune-up but may need a new timing belt.

Thanks in advance for help!