Quote:
|
Originally Posted by david smith
help, i have a 94 c220. once in awhile after the car sets it cranks but refuses to start. the time it sets doesnt really matter, it could be anywhere from a few minutes to days. could this be the fuel check valve or am i barking up the wrong tree? my son usually drives this car and he waits for the fuel pump to run awhile before he tries to crank it over. at least we think the noise in the back is the pump. he almost always has good luck with this method.
|
The noise you hear is the fuel pump and should cut off after about 5 seconds when it has brought the fuel pressure up to normal, if it continues to run afterwards without you starting the engine I would think it is probably worn out and due for renewal.
Although the Seimens OVP relays on these cars are unreliable and should be replaced as a precaution I can't see that being the problem in this case as you say it usually starts when your son lets the pump run for a time.