PeachParts Mercedes-Benz Forum - View Single Post

showme · #7 12-16-2008, 06:32 PM

Glow plugs would be my first bet. And if it's been two years, I'd change them regardless. Even if they test good now, it seems like it's always the worst possible time that they go out. On my Suburban, which runs on a one tank veg oil\diesel system, I seem to burn them out regularly. I check them in the spring and fall, and usually change them all out before winter hits. I guess you know this already, but to check them, take one out and use an ohm meter on it (you know, touching each end with the probes), but don't grab the plug with your hand. i've even gotten different readings by touching different sections of the engine end. If I have any doubt whatsoever, I scrap them and put in a new one. Like I said, I usually change them all out before winter, just to make sure. Better safe than sorry. One or two may start the vehicle when it's nice out, but not when the temps dive. One guy told me a trick to check them in the block, but I had to turn the ignition on, hold the button in (I have a manual glow plug switch since I use heavy duty gps on the burb), and it's easier to just take them out and check them out. Like somebody else said, if you've got power coming into your gp at the eyelet connector, you're relay is doing it's thing.

One thing that I see is that you're putting gas ??? in your fuel? I've been told to cut diesel with kerosene, tranny fluid and just about everything else, but I've always heard to not EVER put gas in a diesel. Anybody else heard that, or am I wrong? Seems like gas firing in your cylinders could really do a number on them. Also, I've gotten grease with water in it before. I was told beforehand to be sure and let it settle well, and leave the bottom of the jug, but I grabbed the wrong one, and had to purge it with 'Diesel 911'. I had to disconnect the fuel remove the fuel filter, dump it, refill it with the Diesel 911, and then add the rest of the bottle to the tank, then crank the engine till it finally started. (Giving the starter a break when necessary) this was on a GM 6.2 diesel, and they are pretty much self purging. Anyway, hope you get it going. I've only been a Benz owner for 2 years, so I'm pretty green compared to most of these guys. They may have a different opinion. But this is what worked in the experience I've had. I'd sure change those plugs, though!

ps-Diesel 911 is for dewatering or degelling fuel. You can get it anywhere (wally world, auto parts stores, etc.) About ten bucks a quart bottle.