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1967 Mercedes 250SL Coupe-long storage won't start!

Submitted by leslie on 2 December 2006 - 8:57am.
HI! First Time here, I would appreciate ANY and ALL information, you could give me. I have recently "inhereited" my father's 1967 250SL Mercedes Coupe, it has set up for 5 years, it needs ALOT OF WORK. I KNOW NOTHING ABOUT CARS!!! except they need gas and oil. I have decided to "redo" this little car and NOBODY WANTS TO TOUCH IT!! A friend of my father's who did do work on this car 5 years, 10 years ago, retired now, said that first thing I need to do is get a FUEL INJECTION PUMP?...ok? WHY? I don't know, but....HERE GOES I need INFORMATION ON: 1.How to REMOVE and REINSTALL a fuel injection pump...........NOOOO, I'm not going to do this myself, my next SEARCH will be for someone who WILL WORK ON IT here in Tuscaloosa, Alabama where they MAKE THE MERCEDES SUV...ANYWAY..... I was told that IF THE "TIMING" WAS NOT CORRECT? THE CAR WOULD NOT GET GAS, WOULD NOT RUN. 2. IS THERE? PRINTED INFORMATION, A MANUAL ON THE REMOVAL AND INSTALLATION OF A FUEL INJECTION PUMP? 3. CLEANING THE INJECTION PUMP? 4. WHAT TOOLS to use for this repair? I want to have a little knowledge about this car before the DEALERSHIP sees me coming and LETS ME HAVE IT!!! ON REPAIRING THIS CAR. I am a single mom, REALLY CAN'T AFFORD THE OIL CHANGE IN A MERCEDES!!! PROBABLY BUT????? If I have to sell it, IT NEEDS TO BE RUNNING!!! I thank you for your time, I thank you for any HELP that you might be able to give me on this cute little car. OH, ALSO....DOES ANYONE KNOW??? HOW TO GO ABOUT HAVING SOMEONE...WHO REBUILDS, REFURBISHES, WHATEVER YOU CALL IT!!..MERCEDES SOMEWHERE IN THE SOUTHERN STATES? Would it be TOO COSTLY to have it restored to run well, and maybe I could keep it. I sure can't go out and BUY A NEW MERCEDES COUPE, BUT WILL IT COST THE SAME! TO HAVE THIS ONE RUNNING? Thank you soooo much for any information, Leslie

Reviving 250SL

2 December 2006 - 10:07am
Kent Bergsma

Hi Leslie,

You may or may not need an injection pump. That would be the last thing I would change before doing everything else required. I need a little more information before I can advise you.

1. Where did the car sit for 5 years - inside or outside - warm or cold?

2. Have you put a battery in it and tried to turn the engine with the starter?

3. Have you replaced the gasoline in the fuel tank?

4. Has anyone checked to make sure your electric FUEL pump is running?

The electric fuel pump is located under the left rear of the car. If allowed to sit for years this pump almost always gets gummed up with varnish and will not pump. Often you can take the bottom plate off the pump, clean the vanes and housing, put it back together and it will run. This is more important to check first than the injection pump.

Let me know what you find and I can advise further. Kent

INJECTOR PUMP IS THE PROBLEM....

2 December 2006 - 1:27pm
leslie
THANK YOU KEN!!!! OKAY, LET ME GIVE YOU INFO THAT I DO KNOW. I really do appreciate your quick reply. 1. Car has been garage kept 2. Brand new battery--2 years old in car now 3. Gasoline has been replaced and that is when a NEW ELECTRIC FUEL PUMP WAS PLACED. IT DID CRANK!!! when Hardstart was sprayed carburator, then go dead. THAT is when the "assumption" was made INJECTOR PUMP ON ENGINE may be bad? and IF YOU TELL ME, that is VERY BAD? What should be my next move? I really do thank you, I didn't think anyone would want to answer me back. thank you,Leslie

What type of fuel pump?

3 December 2006 - 10:01am
Kent Bergsma

I need to know what type of fuel pump was used. Not any electric pump will do. I has to be a factory low pressure high volume vane pump. (very expensive and that is why it is often replaced with a cheap incorrect pump)

You could have plugged up fuel injectors. With the correct fuel pump in place and a new fuel filter installed, loosen one fitting at the injector, wrap a rag around it and turn the engine over with the starter to see if gas comes out. Be careful . Do outside in well ventilated area with a fire extinguisher close by. Do this one at a time to check for fuel. If no fuel AT ALL then your injection pump is gumed up.

You can remove it and send it out for overhaul. Cost is $600 to $800. Call 1-800 FOR MERC to order factory information on removal, replacement, and timeing.

electric fuel pump is the right one

7 December 2006 - 9:10am
leslie
THANK YOU KENT for getting back with me. I will try to explain this as I was explained.....OH BOY! 1. A factory INLINE 15lb pressure? electric fuel pump was replaced, and was checked....YES! gas spewed out every where and works really well, but......................when the "fuel" gets to the INJECTOR PUMP ON TOP OF THE ENGINE..IT AIN'T MOVING NO FUEL! 2.WAS TOLD!!!.....YES, The INJECTOR PUMP can be replaced too, OR possibly cleaned! but!.................BIG BUT!!!!!!!!...........YOU HAVE TO MAKE SURE THAT EACH INJECTOR IS "TIMED" TO EACH CYLINDER TO MAKE IT GET THE GAS TO THE ENGINE TO MAKE IT RUN. 3. THIS "INJECTOR" PUMP, I may be calling it the wrong thing, IS NOT PUSHING THE GAS TO THE ENGINE.....THAT IS CLOGGED UP. And to take it off, clean it, replace it.........BUT......YA GOTTA KNOW HOW TO TIME THE THING TO EACH CYLINDER. Kent, I hope that I have not "confused" you or have been misinformed as to what is WHAT! This is what has been giving to me. I don't understand why a 1967 Mercedes would be sooo difficult to RUN! I guess I thought ALL CARS were simple.......Engine, oil, carburator, gas.........TA! DA! YOU GOT WHEELS!!!

Injection pump sounds like the problem

8 December 2006 - 9:45pm
Kent Bergsma

I would recommend you send out your injection pump for testing and overhaul. Contact the following company for help

Pacific Fuel Injection
153 Utah Ave
So. San Francisco
CA. 94080
(650) 588 8880 [ask for Gus]