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Dan
Dan, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 1371
Experience:  Dealer Auto Technician
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My girl has a 2008 mercedes E350, the car is cranking strong

Customer Question

My girl has a 2008 mercedes E350, the car is cranking strong but will not start. We replaced fuel sender/filter (part # A1714700890) and relay, fuse is fine, and now we just replaced the crankshaft sensor!!!! Can anyone please help
Submitted: 2 months ago.
Category: Mercedes
Expert:  Dan replied 2 months ago.

Hello my name is***** am an ASE Master Technician and I am glad to help you out with your question.

Expert:  Dan replied 2 months ago.

The first step is getting an engine scan done for any codes that may be causing the no start problem.

Customer: replied 2 months ago.
We only recieved 2 codes p0025, and i believe the other was p2006
Customer: replied 2 months ago.
Hello???
Expert:  Dan replied 2 months ago.

The engines intake manifold needs to be replaced for the p2006 code, the p0025 could be caused by low oil level. Have you checked the oil level?

Customer: replied 2 months ago.
Oil level, and pressure are fine...
Expert:  Dan replied 2 months ago.

A common problem for the p0025 is the exhaust cam solenoid, it should only be about $25 to replace. The generic description says that it is the left exhaust cam so I would feel confident with that. The solenoid is behind the power steering reservoir on the drivers side.

Customer: replied 2 months ago.
Sorry to sound disgruntled mr. Ase master, but i was told from mercedes that neither of the codes would cause this issue
Expert:  Dan replied 2 months ago.

Ok so you don't need help, I will opt out and another expert will be with you shortly.

Customer: replied 2 months ago.
Quitter!!!! Obviously i need help.
Expert:  Dan replied 2 months ago.

I honestly am trying to help you, I understand this can be frustrating. Keep in mind it can be difficult to diagnose a vehicle over the internet. I am not there to look at the vehicle and use any type of diagnostic tools that are readily available in a shop. I am going by the info that I have which was 2 DTC's and a no start. You need to check fuel pressure, spark, injector pulse, and compression and see which one you do not have. The codes are most likely prior and not affecting the no start at all.

Customer: replied 2 months ago.
Spray starting fluid in it and she runs like a champ
Customer: replied 2 months ago.
i apologize as well, just im a really good back door mechanic, and this is literally the first vehicle giving me shit
Expert:  Dan replied 2 months ago.

Have you checked voltage at the fuel pump while cranking?

Expert:  Dan replied 2 months ago.

Do you have a wiring diagram for the fuel pump?

Expert:  Dan replied 2 months ago.

If it runs with starting fluid, you have spark, compression and injector pulse, so that leaves fuel pressure.

Customer: replied 2 months ago.
was a tight fit but voltage was normal on old and new pump
Expert:  Dan replied 2 months ago.

Do you have fuel pressure at the rail?

Expert:  Dan replied 2 months ago.

Can you hear the pump running?

Expert:  Dan replied 2 months ago.

Is there fuel in the tank?

Customer: replied 2 months ago.
Can not hear pump running but when i took off fuel line to rail...i got sprayed
Customer: replied 2 months ago.
Almost like the fuel primes, but doest stay steady
Expert:  Dan replied 2 months ago.

Do you have injector pulse?

Expert:  Dan replied 2 months ago.

You could have pressure to injectors but they are not opening or closing, you should have 12 volts to each injector and the pcm controls the ground

Expert:  Dan replied 2 months ago.

Do you have a noid light?

Customer: replied 2 months ago.
Injector pulse not sure on that???
Expert:  Dan replied 2 months ago.

You can make a noid light out of a license plate bulb, remove an injector connector and insert the bulb connectors into the harness, the bulb will blink while cranking if you have a pulse.

Expert:  Dan replied 2 months ago.

Connect the bulb in series, polarity does not matter.

Expert:  Dan replied 2 months ago.

This could be related to that exhaust cam solenoid dtc that you have stored. The power for the injectors goes through that solenoid.

Expert:  Dan replied 2 months ago.

I am looking at the wiring diagram now.

Expert:  Dan replied 2 months ago.

p0025 is the code for the exhaust cam solenoid

Customer: replied 2 months ago.
Ok dan showing pulse, and i replaced the exhaust cam solenoid for shits and giggles......still nothing
Expert:  Dan replied 2 months ago.

The next step is to connect a fuel pressure gauge at the fuel rail.

Expert:  Dan replied 2 months ago.

Hello again Dan here,

I am contacting you because the post has not been closed or rated.

This question is coming up on 7 days which means it will time out and close.

You have already paid to get this question answered, but you have not rated.

Let me help some more. Is there anything else I can help you with?

If I did not give you 5 star service, please let me know what I missed.

Thanks

Customer: replied 2 months ago.
I got rid of 2 codes and got a new one for an ect sensor
Expert:  Dan replied 2 months ago.

Do you have the code number?

Customer: replied 2 months ago.
Po118
Expert:  Dan replied 2 months ago.

It is common for the thermostat to stick on this vehicle and cause this code.

Customer: replied 2 months ago.
Is the ect an easy fix or should i start with the thermostat......could it fix my issue??
Expert:  Dan replied 2 months ago.

The ect is on the left side of the engine.

Expert:  Dan replied 2 months ago.

Start with ect but this could also be a thermostat issue.