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  #1  
Old 06-18-2006, 01:28 PM
tivoliman's Avatar
Happy with Mercedes
 
Join Date: Dec 2002
Location: New Jersey
Posts: 403
Could it be the Fuel Pumps (yes two)

The car runs fine, or it stales or it just won’t start.

The most common symptom is that it will drive over 60 MPH it just won't accelerate to 60 very fast.

My first thought is that the fuel pump may be slicking or such.

The car has two pumps in-line. One on bottom is somewhat noisy.

No big grinding noise.

Your thoughts and suggestions. I was considering replacing the noisy pump, then thought - hmm, (old wine skin bible story) perhaps I should replace both.

Are there other common causes for these symptoms?

Thanks

1993 - 500SEL, 183,000 miles
Original fuel pumps on the car.

Anymore I have it in my driveway, waiting ot be fixed, just don't trust it. Was going to have it towed to the shop, but am considering one shot at fixing it first.

Thanks for the suggestion.

I may be off base trhinking it's the Fuel Pump.


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Thanks for the help
Bill Fisher

'86 560SL (186K) - Now a 'classic' : Registered as an Historic Vehicle
02 E430 in the stable
'14 LS460 (Lexus)
- - - - -
'95 E420 (198K) found a new home
'99 E320 (80K) (gave it's life for me as we hit a bumper)
'95 E420 (231K) Sold to a happy buyer, new to Mercedes
'90 300E (65K) Sold to an Mercedes Lover
'92 190E (215K) - retired to the salvage yard
'93 500SEL (214K) - Moved to another family, still runs like a young pup
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  #2  
Old 06-18-2006, 02:24 PM
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Location: Florida / N.H.
Posts: 8,804
Do a fuel pressure test and check the filter .. a clogged filter will results in a strain [ noisy] on the pumps..........
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  #3  
Old 06-18-2006, 02:48 PM
tivoliman's Avatar
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Join Date: Dec 2002
Location: New Jersey
Posts: 403
Pump was just changed 5,000 miles ago

the pump making the noise is nearest the filter

may be worth a try - local auto parts store will have a filter.
__________________
Thanks for the help
Bill Fisher

'86 560SL (186K) - Now a 'classic' : Registered as an Historic Vehicle
02 E430 in the stable
'14 LS460 (Lexus)
- - - - -
'95 E420 (198K) found a new home
'99 E320 (80K) (gave it's life for me as we hit a bumper)
'95 E420 (231K) Sold to a happy buyer, new to Mercedes
'90 300E (65K) Sold to an Mercedes Lover
'92 190E (215K) - retired to the salvage yard
'93 500SEL (214K) - Moved to another family, still runs like a young pup
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  #4  
Old 06-18-2006, 03:11 PM
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Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Based on your symptoms just about the last thing I would think of would be a fuel pump problem. As with most things, anything is possible.
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Continental Imports
Gainesville FL
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  #5  
Old 06-18-2006, 05:12 PM
tivoliman's Avatar
Happy with Mercedes
 
Join Date: Dec 2002
Location: New Jersey
Posts: 403
I was thinking the same thing

The on again off again stuff is spooking me.

I was thinking the mechanical pump would either work or not.

regulator maybe
__________________
Thanks for the help
Bill Fisher

'86 560SL (186K) - Now a 'classic' : Registered as an Historic Vehicle
02 E430 in the stable
'14 LS460 (Lexus)
- - - - -
'95 E420 (198K) found a new home
'99 E320 (80K) (gave it's life for me as we hit a bumper)
'95 E420 (231K) Sold to a happy buyer, new to Mercedes
'90 300E (65K) Sold to an Mercedes Lover
'92 190E (215K) - retired to the salvage yard
'93 500SEL (214K) - Moved to another family, still runs like a young pup
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  #6  
Old 06-23-2006, 11:11 PM
tivoliman's Avatar
Happy with Mercedes
 
Join Date: Dec 2002
Location: New Jersey
Posts: 403
The answer is in - Both Fuel pumps

Took car to the mechanic - who tested the pumps.

Seems one wasn't working, and the other was partially working.

use this as research for future problems
__________________
Thanks for the help
Bill Fisher

'86 560SL (186K) - Now a 'classic' : Registered as an Historic Vehicle
02 E430 in the stable
'14 LS460 (Lexus)
- - - - -
'95 E420 (198K) found a new home
'99 E320 (80K) (gave it's life for me as we hit a bumper)
'95 E420 (231K) Sold to a happy buyer, new to Mercedes
'90 300E (65K) Sold to an Mercedes Lover
'92 190E (215K) - retired to the salvage yard
'93 500SEL (214K) - Moved to another family, still runs like a young pup
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  #7  
Old 06-24-2006, 10:02 AM
Registered User
 
Join Date: Sep 2003
Location: France
Posts: 491
hello tivoliman

could you explain how your mecanic tested each pumps.

have you changed the bad one or both?

how does it work now?

let us know

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