Transmission flaring from a stop? - PeachParts Mercedes-Benz Forum

Diesel911 · #1 08-31-2014, 01:14 AM

Quote:

Originally Posted by Strand

What would that be? The fuel filters have both been recently changed, most recently the primary only last week. Everything seems primed and ready to go, engine is cranking but behaving like absolutely no fuel is getting to it (no sputter, no rough start). I'm at a bit of a loss.

If the Fuel in the Tank has gotten contaminated by a load of bad Fuel. I have seen a new Fuel Filter last 30 Minutes after it was changed before it plugged and stopped the Engine. Filters don't care about when they are changed last they just do their job and get plugged when they stop enough contaminants to plug them.

Then there is also the Fuel Tank Screen that can get plugged. If you have a ½ Tank of Fuel you can swap the Positions of the Cigar Hose and the Fuel Inlet Hose where they come off of the Fender well and that bypasses the Fuel Tank Screen and draws Fuel from a higher position in the Tank (note that drawing Fuel from a higher position in the Tank also means you are going to run out of Fuel before your Gage reaches Empty). If it runs good with the Hose positions swapped your Tank Screen is plugged.
You can change the Spin-on Filter with a new one and put the old one in a Zip-Lock Bag. If the new Filter does not fix the Problem save the one you removed for re-use later.

I had the same Transmission symptoms and I changed the AT Filter and Fluid and the Symptoms went away for not quite a year when My B2 Piston Broke.
I am guessing that when I had the original issue that the B2 Piston was sticking and changing the Fluid and Filter got enough pressure to it for it to work for awhile.

But there is no way to tell if that is what is your issue without removing the B2 Piston and at that point you might as well replace it due to the labor involved.

There is a Lip Seal in there that can get hard and there is an Aluminum Bushing that is replaced with a less grabby Nylon one.
Of course as others have stated there is other things that can cause a problem then the B2.

At the bottom of the Pic the arrow points to where the B2 Piston looks like it was binding on the Aluminum Bushing. The Aluminum Bushing is not shown in the Pic.

Strand · #2 08-31-2014, 10:23 PM

Quote:

Originally Posted by Diesel911

If the Fuel in the Tank has gotten contaminated by a load of bad Fuel. I have seen a new Fuel Filter last 30 Minutes after it was changed before it plugged and stopped the Engine. Filters don't care about when they are changed last they just do their job and get plugged when they stop enough contaminants to plug them.

Thanks. I hadn't considered the possibility of bad fuel, but the problem did occur after a relatively recent fill-up in Connecticut. Would a batch of poor fuel alone be capable of clogging the filters to the point that the car wouldn't start at all (not even a sputter or rough start)? The prefilter looked clear, for what it's worth.