New problem with my '91 240. At first I thought this was a water in\nthe gas problem but now that I've run a couple of tanks of "good " gas\nand 4 bottles of "drier" through the car I'm beginning to think it's\nsomething else. Yesterday I did a 50 mile drive and for the last 20\nor so ran the AC. As I was going down an exit ramp off the highway\nthe car started missing and backfiring. I made it to a store and let\nit sit there for a half hour or so. When I tried to restart it it ran\ngreat but I took it to a garage nearby. The mechanic did a cursory\ncheck and said he couldn't determine anything wrong. The engine was\nfine. Drove back home (another 50 or so) with no further problems.\nToday I've run several short errands and then later in the day did sit\n(while waiting on someone) with the car running and the AC on for\nmaybe 15 minutes. When I went to leave it ran fine for a couple of\nminutes and then starting bogging down and missing again. Died in\ntraffic but I coasted into a lot where I sat with the engine off for a\ncouple of minutes then it restarted and ran great the rest of the way\nhome. (10 minutes)\n\nI don't know if this is related to the extra pull on the engine while\nrunning the AC or it's something unrelated. Any ideas?\n\nThanks.