pookdogg

I have a 2001 w203 c240, 146,000 miles, drove it about 2hrs the other day got home it sat til the next day, it started up and was running then it died googled and youtubed info had the CPS changed.... and BOTH fuel pumps and still nothing it just turns over....and YES I did check the relay..... now im stumped please help me

Alswag

Check fuel pressure. I'd make sure your injectors aren't clogged. But to be safe, you'd be better off getting a dealer/indy to use an SDS on the car for a proper diagnosis. It'll show you magical things you never knew you could see.

pookdogg

ok ill check that, would a fuel filter cause these problems?

Alswag

A clogged filter could also cause these problems, though from my experience it doesn't happen often. Again, get it scanned and check it out.

pookdogg

car has no codes, so far ive changed the CPS, fuel pump and sending unit, and fuel filter car is still not starting. its got spark cause I spray a little starter fluid( I KNOW I KNOW a no-no) in the MAF and it started up... im at my limit with this stupid a$$ car

cm60k

Do you try to open the fuel hose(at the Engine bay), and when you start the car to see if fuel reaches to injectors...?!?

ZAYED,,

pookdogg

where would that be? at this point ill try anything

pookdogg

seems like theres no pressure on the rail

cm60k

The braided hose that goes to the fuel rail(for injector feed), if there is fuel reaches there, that will fine,

then you have to check the starter fuse 31 or 52 or 57 in the front fuse box(SAM)....

ZAYED,,

pookdogg

checking now, but heres something ....shouldn't it be gas in BOTH tanks? because the drivers side where the sendind unit is completely dry

cm60k

As i know; you should have "2" fuel sender units, both feed each other, maybe this is the issue you have,

did you check the starter fuse in the front fuse box(SAM) first...??

ZAYED,,

pookdogg

seems there is no power to the pump

1st lite

When put the key in the ignition and turn it to "position 2", you should hear a humming/vibrating sound from the fuel pump for approx. 2-3 seconds. If you don't hear anything, you may have a faulty pump or no power getting to it. Keep us posted on what the problem is.

pookdogg

theres no power to the pump

cm60k

Means fuse/relay on front or rear SAM modules...!??!

ZAYED,,

pookdogg

the relay is good in the rear I can hear it clicking where is the one in the front? is it #57?

cm60k

I think the front one comes as a "Starter relay", # 31 or 52 or 57, check that....

ZAYED,,

pookdogg

ill be on it first thing in the morning againg

pookdogg

ok switched out the relays, the old was working (I THINK) because the gas hand wasn't working...switched it out for one in the front.... it started back working BUT car still hasn't started....I don't know where to go from here

cm60k

Do you have a fuse # 4 in the trunk, i assume it's for fuel pump either...!!

ZAYED,,

pookdogg

fuse #4 is good could a bad ECU be the problem? because theres no fuel going to the injectors

cm60k

Ohh, i hope not ECU,

need careFULLY to inspect the wiring or the Electric power that goes to the rear SAM, or the fuel wiring itself....?!!?

ZAYED,,

cm60k

......

pookdogg

how would I check the rear SAM? I think its working because I can hear the relay clicking when the key is position #2.....so I figured it was the ECU? you think resetting it would help?

cm60k

I don't think reset will help,, reset in another thing, the mystery things, why no power goes to the fuel pump,

of course ECU could do that, try to unplug the ECU & see maybe some of elecrrical pins loosing or something....!!

ZAYED,,