560SL coughs with acceleration
 

Two Symptoms:
1 - Let car sit and idle - after 10 minutes - it stalls. After restarting, acceleration will not exceed 2K RPM, then after 5 minutes driving - all appears OK.

2 - Attempt a "Jack Rabbit start" from the traffic light. Things are smooth up to 6K RPM, gear changes, then car coughs and hesitates. Letting off the gas - runs smooth again, just can not quickly accelerate - even from moving.

Thanks for the help

Wife suggests this occured last fall also.

171K mile.:(

I would look at the fuel filter & possibly a whole lot of crud in the tank. ;)

Thanks - more how too
 

Thanks for the suggestion.

I have viewed other threads describing the caughing.

How do you suggest I get the "Gunk" out of the gas tank?

The current tank (half way gone) has a large bottle of Techron.

The fuel filter was changed last year - but I suspect I should change it again.

Summary - How should tank be cleaned and rest of system?

Thanks
:confused:

Almost sounds as though your CIS U computer is kirking out on you.. Had a VERY similar problem in a 560SEL of mine, played with injectors, fuel pumps, accumulators, regualtors etc.. Finally swapped the CIS E computer and it fixed EVERYTHING. Do you know anyone with a 560 that you could swap a the bugger out with??

Sometime you can get a cheap used one on ebay, new they are over 700 :-/

Good Luck!
Jonathan

more info please
 

how does a CSI u differ from a CIS E

When I go to Fast Lane or eBAY for that matter - what do I ask for - no hits on CIS.

Is this the Feul Distributor?

Sorry, that was CIS E :-/ You may have to try some breakers such as potamic or silver star.. If you can't find one there, I bought a new one through buymbparts, the gave a Great price (well relatively at least..!)

Good Luck!
Jonathan

Try www.car-part.com

I picked up an ECM for $50.00.

What are your duty cycle/EHA readings?

Mike

The Professional Mechanic is in my future
 

I'm not feeling comfortable with Fuel Systems.

This weekend I will change the fuel filter - then if not satisfied - call the mechanic.

Justr found a south jersey team I really like.

:-( that's sad when your mechanic recognizes your voice on the phone.