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.
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Posted on Jan 02, 2017
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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