Help with fuel pump power. - PeachParts Mercedes-Benz Forum

paul roberts · #1 04-27-2022, 12:49 PM

Quote:

Originally Posted by 3DawgDoug

Had to really look for the numbers on the plug-in base. The new relay solved the issue.

Only to reveal another issue. This car sat for seven years. It cranks and runs, but after it is up to running temp, If I shut the engine down and try to restart the engine, it acts like it jumps timing. Let it sit overnight and it started right up. Comes up to temp and then it will not restart.

Classic faulty distributor cap behavior on a m103.

Frank Reiner · #2 04-27-2022, 05:44 PM

Quote:

Originally Posted by 3DawgDoug

Let it sit overnight and it started right up. Comes up to temp and then it will not restart.

Quote:

Originally Posted by paul roberts

Classic faulty distributor cap behavior on a m103.

Why OK cold start, but not hot? What happens to the dist. cap when hot that is not occurring when cold?

paul roberts · #3 04-27-2022, 07:53 PM

Quote:

Originally Posted by Frank Reiner

Why OK cold start, but not hot? What happens to the dist. cap when hot that is not occurring when cold?

https://w124performance.com/docs/mb/M119/M119_ignition_misfire_whitepaper.pdf

Frank Reiner · #4 04-27-2022, 10:59 PM

Quote:

Originally Posted by 3DawgDoug

The new relay solved the issue.
Only to reveal another issue. This car sat for seven years. Comes up to temp and then it will not restart.

Quote:

Originally Posted by paul roberts

https://w124performance.com/docs/mb/M119/M119_ignition_misfire_whitepaper.pdf

"Whitepaper", or snowjob? If condensation and/or tracking in the cap is the culprit, cleaning & drying should provide at least a temporary remission.
A K-jet system left unused for seven years will also exhibit the symptoms being experienced by the OP. All the cold-start provisions will provide sufficient richness for an initial start, but partial clogging of metering valves and nozzles may cause a lean condition when warm.