Starting Issues - PeachParts Mercedes-Benz Forum

stargazer · #1 03-20-2007, 01:00 PM

Quote:

Originally Posted by david s poole

i agree the fuel pump accumulator sounds like the problem because the fuel pumps were replaced[along with the fuel pump check valves].

when u say fuel pump accumulator - is this what u are talking about ??

http://cgi.ebay.com/ebaymotors/Mercedes-fuel-accumulator-300SEL-300E-W201-W124-W126_W0QQitemZ320092563566QQcategoryZ33553QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Also where in the engine bay is it located??

david s poole · #2 03-20-2007, 03:33 PM

yes but it's not in engine bay,it's above fuel pump[s] by right rear axle.

lkchris · #3 03-20-2007, 06:48 PM

Hot start issue is symptom of leaking injectors flooding the engine.

Try starting with accel pedal down some to verify.

stargazer · #4 03-21-2007, 01:47 AM

Quote:

Originally Posted by lkchris

Hot start issue is symptom of leaking injectors flooding the engine.

Try starting with accel pedal down some to verify.

when i depress the accelerator/gas pedal down during warn start - engine catches up earlier ..
does this prove i have leaky injectors ?

lkchris · #5 03-21-2007, 11:13 AM

Quote:

Originally Posted by stargazer

when i depress the accelerator/gas pedal down during warn start - engine catches up earlier ..
does this prove i have leaky injectors ?

It more proves you're flooded.

It also proves you're not lacking fuel, which would be the problem caused by accumulator, etc.

david s poole · #6 03-21-2007, 11:27 AM

the accumulator being faulty causes a drop in fuel volume which is why your car feels like it's trying to start before it does and by that time the eha which blew out to about 30-40 milliamps has it too rich,hence the black smoke and rough start.

stargazer · #7 03-21-2007, 03:30 PM

Quote:

Originally Posted by david s poole

the accumulator being faulty causes a drop in fuel volume which is why your car feels like it's trying to start before it does and by that time the eha which blew out to about 30-40 milliamps has it too rich,hence the black smoke and rough start.

David - I don't have black smoke during start- also if it was the fuel accumulator failing - then it should also have problems at cold start also - (engine temp <40 C)?

I know it is not an expensive part and can be repalced- but i just want to understand it better how things work..

So far - I have these suspects 1) OVP 2) Fuel accumulator 3) O2 sensor

pls let me know

stargazer · #8 03-21-2007, 03:25 PM

Quote:

Originally Posted by lkchris

It more proves you're flooded.

It also proves you're not lacking fuel, which would be the problem caused by accumulator, etc.

so u are saying the accumulator is fine! !! right?

lkchris · #9 03-22-2007, 11:35 AM

Quote:

Originally Posted by stargazer

so u are saying the accumulator is fine! !! right?

Starting cold without problems would suggest that.

On our previous 300E, replaced accumulator and pump check valves and made no difference in hot starting problems.

Replacing injectors fixed the problem.