My 91 740 turbo all of a sudden, going slowly down the road, backfired sputtered then stalled. Would start, and it would sputter and stall. could get it to run, but it was erratic, and it would lope. Though it was bad gas, drained the tank, changed the fuel filter, used some additive, then it ran good for a short while, then did the same thing. Now it wont start. sounds like it wants to start, but doesnt. I am at a loss as to where to look now. Most of the trouble shooting tests require the vehicle to be running. Also, I pulled the injector rail, its injecting. Please help me!
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