[W126 Coupe] Fuel leakdown

[Jazzman390 at aol.com]

While troubleshooting a rough start up idle problem, I found that there is no fuel pressure on the injectors when the engine is shut off. Moreover, I found that thee is no pressure at the injectors when the key is turned to ON (not start). Try it if you don't believe me--remove the fuel line from an injector and there will be no pressure. Then while it's open, go turn the key on so the fuel pumps run. Still no pressure. This is on an 87 560SL and a 90 560 SEC. 

So, if you have the same type of injection system, I'd say your fuel disributor may be bad.

Bob Cavazos


In a message dated 12/16/2004 1:49:55 PM Eastern Standard Time, "Chiappinelli, Joseph" <joseph.chiappinelli at mirant.com> writes:

>Not normal and not good. Among other things, the gas will dilute the lubrication qualities of your oil which can lead to some serious damage. One or more of your injectors are in need of replacement or it is possible, though not likely, that you have debris lodged in the sealing surface of an injector preventing its proper closure. I'd address this quickly.
>
>J.Chip
>
>-----Original Message-----
>From: mbcoupes-admin at mbcoupes.com [mailto:mbcoupes-admin at mbcoupes.com]On
>Behalf Of Pavel
>Sent: Thursday, December 16, 2004 1:13 PM
>To: Mercedes Web
>Subject: [W126 Coupe] Fuel leakdown
>
>
> 
>Hi
>Does anyone know if it is normal for gas to leak down out of injectors down
>into the oil when the car is in the on position and not running?  My 560
>has leak down as soon as I put it in the on position it will start to drip
>gas into the oil pan, if I put it in the off position it will stop driping
>gas in to the oil pan eventually.
>thanks
>Pavel
>
>
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