I have a 96 mercedes c220 that is idling rough and random stops when I'm at stop signs and lights. It also has a rough time accelerating. What can be the causes of these issues?
- check the fuel pressure regulator (on injection system @ front top of motor) it has a small rubber vacuum line on it, with the engine running; gently pull off the vacuum hose and hold it about 1/4 inch away from nipple. If you see petrol coming from the nipple on the regulator into the vacuum hose - there's your problem! Replace the fuel pressure regulator and it will run like new!
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