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1991 Other Mercedes Benz Models Heavy miss/ wont start

 



Posted at Tue Aug 26, 2008 6:51 pm
By clusk, New to the forum
Give Feedback | Votes: 0
   
Engine Performance problem
1991 Other Mercedes Benz Models 6 cyl Two Wheel Drive Automatic 225000 miles
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I have a 1991 mercedes 300 SE with a 3.0 liter inline six and 225,000 miles. The car has a very annoying problem. It has had a crank and hard start for a very long time but you could always get it started and it ran good. Now if you can get it started, it has a very heavy miss/ sputter under 1/2 throttle or more in park and 1/4 throttle in drive. It always is a hard start but this problem only occurs when it gets warmed up. Now this morning the car will crank, start and die instantly. Ive replaced the fuel filter, spark plugs and did a tune up. when it wont fire I tested for spark and it has it. I tested for fuel pressure and its there and within spec. if i force feed it some ether it will start but it has that heavy miss/ sputter at any throttle position other than idle.
 
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