Date registered: May 2013
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When Engine is warm it stalls when started
95 c280 with 189,000 miles (acquired in May). When bought, RPM would constantly oscillate when at idle. Tracked down a couple of loose/detached vacuum hoses on the engine/manifold and reattached. Car now shifts through all four gears. Installed new plugs, new air filter. Used some throttle body cleaner on throttle body. Installed new Bosch MAF censor and oscillating rpm ceased. A few weeks later the rpm started oscillating briefly (5 or 6 times) a few seconds after the car was started, then rpm would settle down. It does this every time the car is started. When the car is started in the morning (engine cold), its starts, goes through the 5 or 6 oscillations, settles out, then runs just fine. When the car is started later in the day (engine warm), It starts to oscillate and immediately dies. It will do this unless I rev the engine for a few seconds to a minute. Engine may be running a little rougher than when first purchased. Any ideas?