2003 E55 AMG randomly wont start... please help!
05-01-2020, 06:15 PM
#26
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'99 and '05 E55 AMG
Read the entire threads following. Hang a fuel pressure gauge on the passenger side front of the fuel rail. Pumps prime for ~1 second with key on, then turn off until the Motor Electronics see a signal from the CPS that the engine is turning over. Pressure valve on the fuel filter/regulator is stamped 5.1 Bar.
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05-01-2020, 06:49 PM
#27
Junior Member
Thread Starter
In my case it was so weird I thought it was something with the Keyless Go, but it was the starter. No real indication of a bad starter before it failed. Depending on age/mileage, might want to factor that into the equation since you appear to have spark and fuel now without intervention. The only reason I mentioned about the fuel level is in case your pumps were too weak to pump fuel to the other side of the tank, but that isn't the case with your current situation of a minimum of 1/4 tank on that side.
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Neversatisfied7 (05-04-2020)
05-04-2020, 03:24 AM
#29
Senior Member
Check your F43 fuse in the engine compartment. It's a 15 amp fuse that caused my e63 to show the same symptoms as yours, just after replacing my passenger side valve cover gasket. I thought I did something wrong, but it was just a coincidental and random occurrence. Replacing that fuse solved the problem immediately. If you've checked this already, and mentioned it, please forgive me for not reading the entire thread.
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Neversatisfied7 (05-04-2020)
05-04-2020, 07:03 AM
#30
Junior Member
Thread Starter
It's so strange. The car didnt start that one morning and since then... without changing a single thing... it hasnt happened again and its started up just fine. I can audibly hear the pump priming now and I dont remember it priming the morning it wouldnt start. I have the fuel pump relay and a crankshaft postion sensor both new in the box in my trunk with some tools should it ever happen again. I will likely change both just as preventative maintenance but at this point... I have no clue what caused it and why it only did it the one time. 🤷♂️
05-04-2020, 07:07 AM
#31
Junior Member
Thread Starter
Check your F43 fuse in the engine compartment. It's a 15 amp fuse that caused my e63 to show the same symptoms as yours, just after replacing my passenger side valve cover gasket. I thought I did something wrong, but it was just a coincidental and random occurrence. Replacing that fuse solved the problem immediately. If you've checked this already, and mentioned it, please forgive me for not reading the entire thread.
07-24-2021, 04:04 PM
#33
Had the same issue couldn't find my problem, I have a 03 e55 so wiring is a bit different, look at the 3 fuses next to battery turned out my 40amp fuse was blown. causing vehicle to crank but no start. And if that fuse is blown you probably have some fuel pump issues. (sending unit clogged pulling excessive amperage from pump...)
