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Car is a 91 240 Sedan Auto, Air, Bosch 2.4, B230F
I had have initially attacked this issue from the intake side and cleaned and re-adjusted the throttle body following the steps in the Bentley manual. Also changed the fuel pressure regulator. Started the car up and it ran great until it warmed up. Then it still ran great as long as it was rolling. Going down the hiway it feels better than ever. However sometimes when it comes to a stop its idling fine and then when I give it a bit a gas to take off she stalls. She will start right up and may not do it again for a few stops, but it will do it again cause it did when I got home today. Now if I keep my foot on the gas pedal and speed the idle up a little bit it usually does not stall. My thoughts/questions are as follows.
Idle speed as measured with a tach is about 800-850 rpm, which is a bit more than spec. The throttle switch clicks as it should. Idle speed is constant even if I turn the AC on or off.
Fuel pressure regulator and filter were replace a few months ago
Coil, wires and plugs were replaced less than 5k miles ago
Crank position sensor and wiring was replaced as I was getting a code for intermittent signal, the harness was inspected and no obvious corrosion or faults were seen. Replacing the sensor took care of the code.
At this point I am thinking maybe I have a fuel supply issue, Maybe too rich or lean at idle? Maybe a bad injector?
Cold start injector was replaced by the shop a year ago, but I doubt that has anything to do with this.
I did quite a bit of searching on the net and found a few discussions of similar issues but no solutions.
Any insight would be greatly appreciated.
Thanks,
Don
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1991 240 Sedan auto
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