Question about 1995 Mercedes-Benz SL-Class
I have a 95 SL500 w/80K miles. for about a month it has "only sometimes" run rough at stop lights, etc. after it heated up. But I recently changed the fuel filter (which is installed correctly w/ the arrow fwd) and now it runs fine and accelerates fine when it is cold and has been sitting for a while; but after it warms up, it does not get enough gas when accelerating and idles rough so that I have to put it in neutral at a light to keep it running. Also if you just keep the accelerator in a fixed position at say 1200 RPM it runs fine, and once up to speed at 30-50 mph it seems fine, but even at those speeds it balks on acceleration. Can you help me figure this out please? Thanks.
This sounds like the throttle positioning sensor (TPS) is going out. Could also be a bad O2 sensor or partially blocked EGR valve. Start with the TPS, then got to the O2 and EGR.
Posted on Aug 12, 2008
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