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Car Forum / Mercedes-Benz Cars / January 200689 300E (up sh.ts creek)
Hello everyone again.... At this point in time, I removed all of the fuel from the tank in the car. Replaced the silver fuel filter and checked all the connections in the car. The gasoline was perfectly clear and looked fine. So fine, i through it in one of my boat fuel tanks. After i replaced the filter, I got new exxon hi- test and the car ran ok, but when i came up to a stop, it would quit and would start right back up. On the other hand, today the car ran ok, but when acclerating the car was bucking a little bit. After driving a little, on my way home she died and after 5-10 minutes it started up and chugged home. Does anyone here have any clue what this could be? Everything else is fine like the temp, oil pressure, ect. In the past year, I have replaced the dist cap and rotor, overload protection relay, plugs, wires, ignition coil, fuel pump relay among other things. The fuel pumps sound ok and are audible before cranking. Im really lost and confused now as to whats really wrong.- Chuck NJ Any way you can check the fuel system pressure? If only to eliminate it from further consideration. Is it possible for someone like me to do that? What is needed?-Chuck Basically, you should find, somewhere on the fuel rail, a capped fitting to which a pressure gauge can be attached via a short hose. Your engine's fuel pressure IS specified so a fuel system pressure test isn't a mystery to a professional shop. The straight six E320s, for example, have a psi specification in the mid 40s. It may be quicker and cheaper to have a shop test it than to find and buy a test gauge, learn the specification and finally, do the test! Thinking about your car's problem.... Have you checked the fuel pressure regulator? If it's like the one on my E320, it will be at the end of the fuel rail as a small can with a vacuum hose (to the intake manifold) attached to it. With the engine OFF, simply pull off the vacuum hose to check if fuel leaks from its fitting - if so, replace the fuel pressure regulator. Tom I had a problem with car dying due to electrical problems. It was the connection to the fuel pump relay. Every time I plugged in the relay a could hear the fuel pump come on for a second. The bad connection was to socket contact under relay/fuse box..I sold my 83' 380SEL for $200 and am so glad to have it gone. I can't take a chance drving the car to a shop to have the fuel pressure tested. Anyone here know where, or if there is another fuel filter in the car....other than the one in the tank and near the pumps? So I would assume that the pumps, gas quality, and the new filter are o.k. at this point.-Charlie- Monmouth County NJ Performance products parts catalog for your car shows ONE fuel filter #47-011 for $19.98 each. Suggest you call for free catalog 46M - for future fun. 1-800-243-1220 Their exploded parts diagram shows the fuel pressure regulator is located at front left side, below the idle valve, with a line to the idle valve. I also see, on Page 89, that a $18.50 fuel mixture kit is sold - a repair kit for the fuel distributor??? > I can't take a chance drving the car to a shop to have the fuel > pressure tested. Anyone here know where, or if there is another fuel > filter in the car....other than the one in the tank and near the > pumps? So I would assume that the pumps, gas quality, and the new > filter are o.k. at this point.-Charlie- Monmouth County NJ Did you not see my post about the probability of your main fuel hoses being bad?  Signature"Peaceful solutions ARE possible!" - George Fritschmann III I drained the whole tank and examined the hose off of the tank and the others, and they checked out o.k. The gas was clean as can be out of the tank from the main fuel hose.-Chuck I can't take a chance drving the car to a shop to have the fuel pressure tested. Anyone here know where, or if there is another fuel filter in the car....other than the one in the tank and near the pumps? So I would assume that the pumps, gas quality, and the new filter are o.k. at this point.-Charlie- Monmouth County NJ Would it make sense to purchase a new fuel pressure regulator? |
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