still having the hesitation problem since the part is $491, but I am wondering about the smoke. While the car does this little bit of hesitation that it does, I can see alot of gray to white smoke out the exhaust. So my question is what is the smoke meaning, what is black smoke as opposed to white?

__________________
1996 E300 D
1992 300D
1990 Ford E-350 7.3 Diesel AKA "the Deep Fryer"

Black smoke is overfueling, white smoke can either be a cold engine or water.

__________________

Gone to the dark side

- Jeff

what about blue?

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1996 E300 D
1992 300D
1990 Ford E-350 7.3 Diesel AKA "the Deep Fryer"

Oil.

You can get blue with incomplete combustion as well but they smell different, one like burnt oil the other like unburnt fuel. What is the part?

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

the part is the throttle position sensor. there isnt an oil leak, and the motor doesnt burn any at all. it looks mostly grayish in color. it only happens around 2200 rpm and MOSTLY when the engine is under 80 degrees.

__________________
1996 E300 D
1992 300D
1990 Ford E-350 7.3 Diesel AKA "the Deep Fryer"

This is the 96?

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

I believe it it his '96.

Mine occasionally has a similar problem, but at idle and parking lot speeds. You push gently on the footfeed (since you're in a parking lot) but nothing happens. The engine continues to idle normally, doesn't stall. Push a little harder and something happens, the car accelerates more than you wish but you catch it before you crash into something. Then it's OK until the next time.

I had thought TPS also, $500 part until I added a ScanGaugeII to my car. One of the things that it will display is the throttle position, in a 0 to 100 scale. I accidentally discovered that the throttle position continues to read normally during the lack-of-response incidents. That suggests that the problem is not in TPS but rather in the IP actuator (is there such a thing? I just assumed it into existence). Of course it will turn out to be even more expensive....

I'll report more as I figure it out.

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

So h ow well do you like the Scangauge? I am thinking of getting one myself.

__________________
1996 E300 D
1992 300D
1990 Ford E-350 7.3 Diesel AKA "the Deep Fryer"

this IS in fact the 96.

__________________
1996 E300 D
1992 300D
1990 Ford E-350 7.3 Diesel AKA "the Deep Fryer"

These are known for sucking air on the fuel system O-rings = acceleration dead spot.
Replace the O-rings on your fuel strainer, and check the fuel heater for leak.
Note: The plastic fuel lines may also be sucking air.

EDIT Correction: Fuel Pre-Filter, not strainer.



Have a great day.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

ok not to sound TOO lame, but where are the strainer and fuel heater located?

__________________
1996 E300 D
1992 300D
1990 Ford E-350 7.3 Diesel AKA "the Deep Fryer"

Note:
I need your VIN# to verify correct parts, fuel lines and heater/thermostat.

Fuel Pre-Filter Number 26 in the attached picture.
Top of the housing your metal bolt on fuel filter mounts to, there is a plastic fuel line running into it.
Note: there are two O-rings to be replaced.
PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1996 Mercedes Benz E 300 D Sedan
Part: Fuel Filter
Note: Pre-filter
Use with (1) 601 997 01 48 pre-filter seal ring.
E1000-81337 Fuel Filter Pre-Filter Febi IN STOCK


1996-97 E300 Turbo Diesel Plastic injection pump lines, OM606.912
1998-99 E300 Turbo Diesel Plastic injection pump lines, OM606.962

Attached Thumbnails

 

The strainer is in the tank at the outlet (supply line), the fuel pre-heater/thermo is in the cyl head; follow the short line connected to the top of the pre-filter back toward the head. It is a very low fail part.

You've done the simple stuff like cleaning everything and then using a bright light to look for any fuel leaks, bubbles or wetness at the fuel filter housing and IP?

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

My bad.
Pre filter is wat I was talking about.