quote:
Originally posted by jammer
Are there any tell tale signs of unhealthy fuel delivery system?
Riadh
Riadh,
With the owner's permission (and possibly at a mechanic's shop):
1. You can remove the rubber trunk mat then remove the plastic cap in the center of the trunk floor. This reveals the fuel guage sending unit in the fuel tank. Unplug the electrical connector and use a small socket driver (5mm? 6mm??) to disconnect the unit from the tank. Use a flash light to look into the fuel tank. Note the amount of rust/gunk! Replace everything.
2. This one can be really messy! Remove the main fuel filter canister in the engine bay. (14mm??) Fuel will be spilled. It takes quite a lot of twists & turns to remove the fuel filter canister from the engine bay (oil filter canister is simple). Examine the filter element and canister for rust/gunk. Replace everything.
3. At the fuel tank, pinch off and remove fuel line that returns from the fuel injection pump to the fuel tank. Put a container under it (1/2 gallon size or more). Have the seller turn the ignition on (
not starting the car) for 15 seconds and see how much fuel comes out. It should be about 1 liter or more. This tests the strength of the fuel pump and how clear the lines are from the pump, up to the injection pump, and back to the tank. Replace everything.
4. Drive the car. If the owner allows it, after the operating temp has been at normal for a few minutes you should run the car up to the upper parts of the RPM range. In an automatic you can leave it in "2" or "3" as needed. If you can push it to 5,000 RPM or more with no signs of engine problems, that is a good sign.
Oil: Remove the oil filter canister in the engine bay and look for a rubber seal on the housing mount. This is not on the canister that comes off, but on the mount that is on the engine block. There should be a thick seal in the center that looks similar to a 1/2 inch section of garden hose that has been cut and slipped over the center post. This seal is critical to oil filtration and is missing on many cars.
Always get a compression test and leak down test done.
Happy hunting!!
RoddPowell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both tops
1994 E420