Car Questions
RepairPal is your advocate for car care advice and guidance

Excessive cranking

(1998 Mercedes-Benz CLK320)
in Casa Grande, AZ on May 15, 2011
Have replaced all obvious parts but still have excessive cranking before starting. Have recently started turning on key, then off, then on again to start engine. This seems to be working right now. What needs to be replaced so I can just turn on the key and start the car
Displaying 1 answers & 1 comments
Popular Answer
on May 15, 2011
Sounds like a leaking pressure check valve in the fuel pump. This valve keeps up the pressure when you shut off the car, so you don't have to crank for a long time to build the correct system pressure. When you turn the key on and off you run the fuel pump a few seconds, but it will shut off when the engine is not running, so you can't just leave the key on to build pressure. I would have a shop verify this, though, because it means a new fuel pump which is expensive on your car!.

here are some shops:
on May 16, 2011
I have replaced the fuel pump twice in the last week. Sent first one back as defective. What are the chances of getting TWO with the same defect? They are not Mercedes parts but after market parts. What do you suggest?
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
2.3l 91 4dz1 isuzu has fuel spark n compression but wont start it was running 3 days ago i put new fuel lines on it f...
Was doing a TBI cleaning. Gas came up n out so there was extra fuel to burn when starting. When starting it killed th...
Didn't find what you were looking for?