Have you tried cleaning fuel line filter,(if fitted) they have been known
to get clogged,and you could be sucking dirt.
I have had this problem with other vehicles. I usually check the TPS sensor. Throttle Position Sensor. That tells the vehicle when you or not on the throttle so it will idle.
Have replaced it in two vehicles due to the same problem your having.
http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html
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Volvo 760 engine cuts off frequently while
driving?
http://schematicsdiagram.blogspot.in/2012/02/volvo-760-engine-cuts-off-frequently.html
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Car starts and cuts off immediately?
http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html
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Engine cuts out at 3000 RPM?
http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
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While stop engine idles like cylinder
missing?
http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html
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These details will help.
Thanks.
Engine stall or RPM fluctuates
at idle.
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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