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05-16-2004 10:00 PM #1
Another visit from the \'stall\' fairy
So Winter was pretty good to me and my 87 528e. Then the weather changed and so di the car's performance. I am getting random (cold and hot) problems with stalling. When the car begins to sputter (completely non-responsive to accelerator) it may konk out completely, or rev right back up. Regardless, it then will completely stall within a minute. I was stuck on the side of the road last thrsday for 20 miuntes until the car would start again and idle without cutting off again.
The question for over a year now has been is it electrical (sensors, relays) or actual fuel related. Here are the facts:
-Car will stall or fail to idle at start up in hot or cold engine environments.
-Fuel Pump relay has been changed.
-Unplugging the negative battery terminal for 5 minutes and then replugging will resolve this issue 90% of the time.
-Been worse lately in traffic and hot weather while idling.
-Noticed tonight that the Manifold Pressure Sensor cover is loose and able to fall off. Also sensor is not making contact to 3 'pins' consistantly since it is floating in it's container.
Could the manifold Pressure sensor be it?
In my experience here and other places, there are many things that cause this from fuses, relays, fuel pressure regulator etc.
The main suspects now since all other items have been ruled out are:
Manifold Pressure Sensor
Air Intake Sensor?-near boot
Main relay (has not been replaced)
Alternator (possible current or regulator issue)
Other items going on at same time --
1. Ocassionally, ispection light comes on and Tachometer dies, then, it comes backj on and off randomly.
2. Car idles rough. Kind of a gurlgling idle up to about 1500 RPM.
3. Ocassionally, all gages dies and car begins to accelerate ouyt of control...as if it were zombie-fied. Very scary at 80 mph.
I know this is alot to go on at once but let me know any thoughts on this. I appreciate any serious input in advance.
I will include pic of engine and this manifold sensor area.
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