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87 760 turbo bucking at 1500 - 2000 rpms intermittant 700

posted by  Will740turbo on  Wed Mar 16 18:54 CST 2011
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last visit: Wed Oct 22 16:09 CST 2014
[RELATED]

My intuition makes me favor the Hall sensor. Usually, the air intake leak happens when accelerating, not at steady speed without any prompting.

Does it miss and buck while limping it home? The Fuel Pressure Regulator (FPR) usually fails and stays failed - doesn't go back and forth. You can just add a few gallons of gas to the tank - or try driving in big circles or braking semi-hard for a few hundred feet (or maybe parking on a hill) to get the gas to move away from the pickup tube.

Is there anything that consistently happens when this problem appears? Like cold weather, rain, having all the accessories on or something else?
What makes it disappear?

Good Luck


--
1990 740 Turbo, on its way to stock specs, maybe beyond






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