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Hesitation off of idle/ Engine dies 200

posted by  someone claiming to be TomD on  Wed Sep 18 23:11 CST 2002 [RELATED]

Chris,

I don't see how this could be the knock sensor.

I think this is an interelated problem with the idle air control valve, fuel pressure regulator, and/or O2 sensor.

My thoughts are that the air fuel mixture is changed temporarily when you first hit the accelerator. The FI system has to adjust quickly (in milliseconds) in order to prevent the stall. Your system is not compensating quickly enough and hence the engine stalls out or dies. If the instantaneous fuel pressure is not maintained properly you will get either too much fuel or too little. If the O2 sensor is too slow to respond, it will prevent the proper air/fuel calculations by the computer.

I think the problem is in this area. Have any of these been replaced recently, or are they due?

Good luck!

TomD
'86 240
'93 240








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