My brother's 87 535is has the EXACT same symptoms
Did you find out what caused this??????.
The fuel pump, filter and regulator have been replaced with no results. This last weekend I replaced the MAF meter and the ICV. I was able to get the car to run again.
Symptoms. It will start cold and run perfectly with a smooth idle. As soon as it warms up the idle gets irratic and lumpy.
The other odd thing I notice is when I pull the throttle and hold it, the RPM's drop off and while holding it still they'll come back up. It acts like a fuel problem.
I would appreciate any advice..
Thanks
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