[W126 Coupe] Resoldering

[calvin young]

Worked for me as well.  I have had to replace the fuel relay on the 380 SEC 
every few years or so.  When I opened the last one up, saw the commections 
had failed.  Apparently the unit is overheating for some reason.  It could 
use a heat sink to dissipate the heat or a redesign.

Cal

>

> On 8/23/2010 7:39 AM, AZTECPILOT at aol.com wrote:

>> Check your fuel control relay. My 560 SEC did the same thing, getting

>> progressively worse over a ninety day period. It would stall, then

>> restart in a few minutes and run ok for a few days. It turned out to

>> be the fuel control relay. The relay was replaced and have had no

>> trouble for the past four years. About $100 bucks in an independent

>> garage.

>> Tom Seitz

>

> If you troubleshoot to an intermittent fuel relay, and are at all

> capable with a soldering iron, take a shot at repairing the one you have

> before coughing up for a new one.

>

> In the case of my car, I found that the solder joints to a few of the

> high current connections had failed, visibly showing as a black ring

> around the post of one of the connections at the edge of the circuit

> board, and around one or two of the relay connections to the board.

>

> To test if that was actually the cause, I used a piece of spring steel

> (a handy screw driver would work...) to push the existing solder around

> the failed connections into contact with the post, and found that the

> fuel pump was working again.

> I then resoldered the connections, and a few others while I was there,

> and have had no issues with it since.

>

>

> Just my $.02 or maybe $.03, but I figure it's worth a try.

>

> -Josh