I have seen this one, but I don't have the parallel type plugs... I have Bosch pencil plugs. Hence my confusion here... the previous owner installed the pencil plugs but didn't change the wiring... I assume someone had done a conversion to the whole system before these plugs were installed, but now I don't know what's in there and just want a complete setup. Perhaps a junk yard is a good way to go.
vadimivanovich wrote:Change your fuel filters after you do the Lubro-Moly & Sea Foam treatments. Do not just pour those treatments into your tank. Feed a hose from the can into your secondary fuel filter, and the return line that goes back to the gas tank should go back into the can until it's just about used up. Mercedes Source, Peach Parts, and others have videos for this. Plugged filters can lead you on a wild goose chase and they're cheap-n-easy to replace.
I haven't done the Diesel Purge yet, though I have both a bottle of that and two cans of Sea Foam. The only one I've done at this point is Redline's Diesel Fuel Catalyst, which is recommended for tank use. I've noticed a significant drop in smoke at idle from it.
vadimivanovich wrote:Good call on the timing chain... I should do that too. Did you replace the chain tensioner too? You should. Chain guides are a good idea too but only if necessary.
Chain and chain tensioner were replaced. I was told the chain guides should be replaced every time the chain itself is replaced, but that's from an old Mercedes diesel tech who stopped me in a parking lot to check out the truck earlier this week.
vadimivanovich wrote:I have a used spare fan clutch... or you could easily find one at Pick-n-pull for cheap. They'd be the best bet for any wiring you might need too.
I've been to the local junkyards, and while there are quite a few 300D donor sedans around, most of them have been butchered.
I'm interested in buying a new Glow Plug Relay with the wiring harness because the wiring (and relay) in my truck is aftermarket and unlabeled. I've looked at the stock Mercedes Glow Plug Relay and wiring harness from other vehicles, and my connectors will not work if I just get a new relay... both need to be replaced. And to add to the confusion, it's not the old style or the new style parallel type (which makes sense, as I have pencil plugs), but I want to make sure whatever I get will work with the newer Bosch pencil plugs.
vadimivanovich wrote:Your MPGs are good/normal. If you're expecting to do better, don't. For a 2-1/4 ton truck with 125Hp, that's about what you get. I think I hit 18.8 once, and that was with 35" tires
. I'm usually mid-17s.
Ah, but I have the non-turbo OM617... only 88hp. I've been told 17-23 is about average, and I just want to increase economy as best I can. Either way, it's currently better than my 15.5mpg Nissan Pathfinder I've been driving for 5 years.
vadimivanovich wrote:Don't be too paranoid about wire. Wire doesn't wear out. It just sits there. If something cuts it or corrodes under it, that's fixable without changing wire. My truck looked like a nightmare under the dash until I spent an hour with a box of zip-ties organizing everything. It turned out that all of my wire was fine, just some turkey was in there poking around, probably for the radio or air blower wires. No big deal.
Did you find your slow electrical drain?
I haven't found the electrical drain, which is why I believe wires (shorts, whatever) may be suspect. If I drive it every day (with the exception of today) it's fine. If I let it sit for a couple of days, it dies.
I've run tests with a multimeter on every lose wire I've found in the engine bay, and nothing is hot. Part of the issue, I'm sure, is that I'm running a single 800CCA Optima Red Top and not a dual-battery setup or a larger military-style battery (or even the factory Mercedes one, for that matter). But regardless, a battery shouldn't go from fine to dead in two days.
Any ideas for a pencil-plug relay and wiring harness?