Car sat for a year, now no power (om617) - Page 2 - PeachParts Mercedes-Benz Forum

FE240D · #16 05-06-2017, 08:01 PM

Startron diesel fuel treatment helped me get rid of whatever was alive in my tank in my 240d when purchased, it sure can't hurt. Also had to get it online, seemed rare in all the parts stores..

Father Of Giants · #17 05-06-2017, 08:13 PM

My guess is bad fuel, it's probably all gummed up in there.

I would of purged the entire system of fuel first. Then ran Liqui Moly, then regular fuel.

Your diesel sounds sick, why not try Liqui Moly???

sloride · #18 05-06-2017, 08:32 PM

Quote:

Originally Posted by Sev

When I replaced the fuel pre-filter this morning, I disconnected one of those two hoses, and got fuel on both of the connection areas. I replaced the two hoses with each other just now and took it for a test drive. The car now runs properly. I don't get the problem with the sputtering anymore. The car doesn't hesitate going uphill anymore. So what does this mean?

By the way the 'fat cigar hose' you mention, is in fact decrepit and is cracking in a few places. Not leaking, but clearly needs to be replaced. I dried all hoses going into and out of the pre-filter, and into the two metal lines on the fender thoroughly with paper towels, and after taking it for a drive I tested for wetness with paper towels again and they were dry.

You do have a plugged tank strainer or air leak on your fuel supply line between the firewall and the tank.
You have bypassed the tank strainer by reversing the feed line and return to the tank, now not going through the strainer, now drawing fuel from what was the return line at somewhere near half tank, which means you will run out of fuel long before gauge shows reserve because you are no longer scavenging from the bottom.

Sev · #19 05-06-2017, 09:56 PM

Quote:

Originally Posted by Father Of Giants

My guess is bad fuel, it's probably all gummed up in there.

I would of purged the entire system of fuel first. Then ran Liqui Moly, then regular fuel.

Your diesel sounds sick, why not try Liqui Moly???

I have done Liqui Moly before, actually just over a year ago when I did a diesel purge. Right now I have Clear-Diesel, made by Power Service (the same company that makes Diesel Kleen). It calls itself a fuel and tank cleaner. It says it treats up to 100 gallons of fuel. I'm wondering with 3/4 of a tank of diesel, should I just dump the entire 32oz bottle into the fuel tank and let the car idle until I run out of fuel? And then do a diesel purge with Liqui Moly as stated above?

Sev · #20 05-06-2017, 09:57 PM

Quote:

Originally Posted by sloride

You do have a plugged tank strainer or air leak on your fuel supply line between the firewall and the tank.
You have bypassed the tank strainer by reversing the feed line and return to the tank, now not going through the strainer, now drawing fuel from what was the return line at somewhere near half tank, which means you will run out of fuel long before gauge shows reserve because you are no longer scavenging from the bottom.

But how can that be, given that the strainer was replaced with a brand new one, and since then it's only had half a tank of diesel in there for just one year? I don't think diesel can go so bad in one year that it turns into slime and clogs up a brand new strainer. Do you think it could though?

jake12tech · #21 05-06-2017, 09:59 PM

Diesels don't burn a lot of fuel at idle, and idling for the length of time it will take to drain the tank (maybe 12 hrs of consistent idle?) you will build a LOT of carbon and soot up that motor like a mother. Worst thing to do is consistently idle diesels, google wet stacking. You'll also air bound the system and it will be a real fun time getting the air out from running it dry.

Just drain the fuel or you use a mityvac and remove the fuel sender and suction the old fuel out.

Father Of Giants · #22 05-06-2017, 10:17 PM

Quote:

Originally Posted by jake12tech

Diesels don't burn a lot of fuel at idle, and idling for the length of time it will take to drain the tank (maybe 12 hrs of consistent idle?) you will build a LOT of carbon and soot up that motor like a mother. Worst thing to do is consistently idle diesels, google wet stacking. You'll also air bound the system and it will be a real fun time getting the air out from running it dry.

Just drain the fuel or you use a mityvac and remove the fuel sender and suction the old fuel out.

I thought wet stacking only applied to stationary diesels under no load?

jake12tech · #23 05-06-2017, 10:44 PM

Quote:

Originally Posted by Father Of Giants

I thought wet stacking only applied to stationary diesels under no load?

Yes, wet stacking occurs at idle, which is no load.

kerry · #24 05-06-2017, 10:48 PM

Swap it back and see if the problem returns.

Father Of Giants · #25 05-06-2017, 11:08 PM

Quote:

Originally Posted by jake12tech

Yes, wet stacking occurs at idle, which is no load.

Scary https://www.youtube.com/watch?v=4ApPm-LFzrM

jbach36 · #26 05-06-2017, 11:28 PM

Check it. My W124 has one, and most people never think of it. It gets clogged with algae.

Sev · #27 05-07-2017, 12:09 AM

Quote:

Originally Posted by jake12tech

Diesels don't burn a lot of fuel at idle, and idling for the length of time it will take to drain the tank (maybe 12 hrs of consistent idle?) you will build a LOT of carbon and soot up that motor like a mother. Worst thing to do is consistently idle diesels, google wet stacking. You'll also air bound the system and it will be a real fun time getting the air out from running it dry.

Just drain the fuel or you use a mityvac and remove the fuel sender and suction the old fuel out.

Okay, I will defer to your knowledge then, because I didn't know about this wet stacking busienss. I will try sticking my Topsider into the fuel tank and sucking out as much diesel as I can. After that, I will do a diesel purge with Liqui Moly. I have that on order as we speak. After that, would you recommend putting in, say, a quarter tank of fuel and running this product I bought called Clear-Diesel, made by Power Service? Supposedly cleans up diesel fuel tanks.

Sev · #28 05-07-2017, 12:28 AM

Quote:

Originally Posted by kerry

Swap it back and see if the problem returns.

Good point Kerry. I just switch the hoses back to their original position and fired her up. It's dark outside and I don't want to take it around the block like that, so for now I'll let it idle for 10-15 minutes. Tomorrow morning I'll take it for a spin and see what results

jake12tech · #29 05-07-2017, 12:28 AM

Quote:

Originally Posted by Father Of Giants

Scary https://www.youtube.com/watch?v=4ApPm-LFzrM

It's pretty bad stuff man no doubt. I don't warm up my diesel more than 3 minutes at a time in winter or not. Just enough to let the oil pressure build and drive it.

Quote:

Originally Posted by Sev

Okay, I will defer to your knowledge then, because I didn't know about this wet stacking busienss. I will try sticking my Topsider into the fuel tank and sucking out as much diesel as I can. After that, I will do a diesel purge with Liqui Moly. I have that on order as we speak. After that, would you recommend putting in, say, a quarter tank of fuel and running this product I bought called Clear-Diesel, made by Power Service? Supposedly cleans up diesel fuel tanks.

All that off the shelf stuff is trash. The only stuff I use is their cetane booster in the grey bottle at walmart. Startron is good stuff, it dissolves any condensation in the tank, mild forms of algae etc.