What to do if your Mercedes 450SL dies?
Replaced points with Petronic 1885, along with replacing coil and wired per thread on this forum. Engine cranks fine cold and runs until it reaches operating temperature and idles down. Length of idling before engine dies varies each time.
What to do if your 450SL is not running?
Bought 450sl (10704412015***) not running, (set for 12 yrs) gas tank stopped up removed and cleaned, along with fuel pump/lines. Replaced points with Petronic 1885, along with replacing coil and wired per thread on this forum. Engine cranks fine cold and runs until it reaches operating temperature and idles down.
What’s the problem with my 1974 450SL?
It ribs up fine when cold, no issues. It seems the AAV and the cold start valves are working good, and it idles down after it closes, then after the temp bulb reaches operating temp, the computer changes to normal operation, and relies on throttle position, MAP, and the temp sensor, is the MAP the same P/N as the one you took off?????????????????
Where is the fuel pressure regulator on a Mercedes 450SL?
The Fuel Pressure Regulator, on top of the fuel “rail” supplying the injectors, maintains the injector supply at a nominal 30 PSI (adjustable by turning the nut on top).
What kind of gas is in a 1975 Mercedes 450SL?
In the case of my 1975 450SL, the gas had been in the tank for about 7 years and had turned to what resembled runny caramel. The tank was removed and cleaned by a local radiator shop to remove the thick layer of varnish the old fuel had left behind during evaporation. Also replaced was the fuel pump and filter along with all rubber fuel lines.
What should I replace in my Mercedes 450SL?
Now that the engine is known to truly run, it is time to fit the very old D-Jetronic system with new parts. Replaced were all rubber injection lines, fuel injectors, Mercedes Fuel damper and fuel pressure regulator. These parts are several critical components that must be functioning perfectly to deliver fuel properly.
How does a Mercedes 450SL fuel tank change?
The tank was removed and cleaned by a local radiator shop to remove the thick layer of varnish the old fuel had left behind during evaporation. Also replaced was the fuel pump and filter along with all rubber fuel lines.
What to do if your Mercedes 450SL is leaking?
If any hose feels excessively hard, has hairline cracks or is leaking in anyway, it is best to change out the line. Also look at the fuel injectors. There were five out of the eight that had been leaking when it was parked some severn years ago and they re-leaked when we got the car started.
Where does the air supply come from on a Mercedes 450SL?
The air supply to the AAV and the IAS is from a port in the throttle body above the plate, the legs of the “Y” tube split off, one to the AAV, one to the IAS/CSV assembly, then another “Y” tube comes from the output of each of those to a port below the throttle body on the manifold.
What kind of problem does a Mercedes 450SL have?
Check the ‘plumbing’ of the idle air bypass system for blockages, possibly where it goes into the manifold past the throttle body, if you’ve eliminated the “Y” tubes already. You might have two problems: a constricted idle air system, and an air leak into the intake manifold.
The air supply to the AAV and the IAS is from a port in the throttle body above the plate, the legs of the “Y” tube split off, one to the AAV, one to the IAS/CSV assembly, then another “Y” tube comes from the output of each of those to a port below the throttle body on the manifold.
What does the throttle body do in a Mercedes?
The throttle body is where the throttle valve is mounted and is what control the amount of air that enters the combustion chamber. When there are throttle body malfunctions the wrong amount of air enters into the engine causing problems with air/fuel mixture ratio. Here is a close up picture of a Mercedes throttle body.
Bought 450sl (10704412015***) not running, (set for 12 yrs) gas tank stopped up removed and cleaned, along with fuel pump/lines. Replaced points with Petronic 1885, along with replacing coil and wired per thread on this forum. Engine cranks fine cold and runs until it reaches operating temperature and idles down.