I have a ML320 2000. It lost acceleration, power. I hooked up a code reader it said P301, P304 CPS sensor was changed didn't help at all. Replaced the fuel filter, ran ok until it warmed up then it chugged and coughed and died. Fuel pump seems to have a lot of pressure. Any help would be appreciated.:surrender:
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Please update your profile in USER CP to include the year and model of your truck, also your geographical location.
In your first post on this problem, you stated that it started right after filling up your tank. That would lead one to believe that the problem stems from fuel qantity or fuel quality. Since you have already changed the fuel filter that eliminates one issue on the quantity side, the other being the fuel pump. So, you would have to have the fuel pressure checked in order to rule out that possibility. Your felling about it having enough fuel pressure does not count, it's what the pressure gauge tells you that counts.
On the quality side, there is not much that can be done other than removing the fuel from the tank. If the fuel pressure is not the problem, try two or three bottles of dry gas and see if that helps the problem.
In your first post on this problem, you stated that it started right after filling up your tank. That would lead one to believe that the problem stems from fuel qantity or fuel quality. Since you have already changed the fuel filter that eliminates one issue on the quantity side, the other being the fuel pump. So, you would have to have the fuel pressure checked in order to rule out that possibility. Your felling about it having enough fuel pressure does not count, it's what the pressure gauge tells you that counts.
On the quality side, there is not much that can be done other than removing the fuel from the tank. If the fuel pressure is not the problem, try two or three bottles of dry gas and see if that helps the problem.
I am trying the dry gas. And keeping my fingers crossed.
Well she is all back together. I ended up replacing the fuel pump too. That's alot of work! I picked up one at a salvage yard for 110. and she seems all better. Thanks to this site I saved a lot of money. MB wanted 508 for the pump, 158 for the filter and 800for estimated labor. Thank you for your help.
kellymaureen, since you went thru the hard work of removing and replacing the fuel pump, you should've replaced it with new pump (MB genuine pump, from an on-line store, definitely less than $508). Now you don't know how long that used pump will last. well, too late for that thought 
2002 ML55 AMG, 2005 Chrysler Crossfire Coupe Limited, 1999 C280
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I'm glad you finally resolved your problem kellymaureen.:thumbsup:
I read in another thread, in which you posted, that your truck has 275,000 miles on the odometer!
That's great news for those of us who want to drive this thing till it can go no more.
I'm interested to know what parts/fluids/maintenance/repairs you've done on your truck with that mileage.
I read in another thread, in which you posted, that your truck has 275,000 miles on the odometer!
That's great news for those of us who want to drive this thing till it can go no more.
I'm interested to know what parts/fluids/maintenance/repairs you've done on your truck with that mileage.
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