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#1
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1996 E300...Should I replace the fuel injectors?
I have a 1996 E300 with around 265k. I run the car on straight WVO in the summer, a blend of that and diesel for the fall and diesel for the winter (although I might put 100 miles on it the entire winter).
Lately I've noticed the car give a little run on after I turn it off (dieseling). Also, If I "floor it" she won't rev out like she used to into the next gear. She'll accelerate and hesitate until I let off the pedal to shift into gear. If I drive it normal it shifts fine. Here is a link for a video of what I'm talking about- https://youtu.be/oRZDdbHNPvQ I'm thinking that with that many miles the spray pattern on the nozzles is probably shot. On another issue- It also runs very rough for the first 30 seconds to minute. I know that's glow plug related and I got 5 out with no problem, but the rear glowplug was a PITA to get out and is now rounded out. I bought a rounded out bolt removal tool, just debating on trying to pull it the rest of the way out or leave it. It's an original GP and only 1/4 of the threads are out so far.
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2022 Nissan Frontier Pro4x 1990 Mercedes 420SEL 1950 Packard 8 Previous German cars- 2001 Mercedes SL500 1983 Mercedes 300SD 2011 BMW 328i (manual) 2008 BMW 535xi (manual) 2006 BMW M3 (manual) 1980 Mercedes 300TD 2006 BMW 750i 1996 Mercedes E300D 1994 BMW 740i 2006 BMW 330xi (manual) 1999 E300DT Smoke silver/black 253k 2012 BMW 535i Xdrive M-Sport 1984 300TD-T 304k 1988 Mercedes 560SEL (parts car) 2010 BMW 550i xdrive 2017 Audi A4 Presitge 1979 300SD 313k 2003 E500 189k Last edited by turbozeke418; 10-06-2015 at 02:50 AM. |
#2
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Can you test the rear glow plug? If it's OK, why not just leave it in?
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Charlie --------------------------- '66 VW 1300 96K miles '97 E300D 239K miles '85 300D 203K miles (sold Sep 2012) |
#3
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Is the EGR system still connected? Between that and the WVO (no heater?) I'm sure the inside of the combustion chamber is a mess. Any idea what your fuel economy numbers look like? My '96 E300D with 300,000+ miles has averaged 27 MPG in mostly around-town driving for years on D2 and B20. The injectors have never been touched.
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"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 |
#4
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I had an E300 same year with 300k miles. Injectors never change. Having said that I had injectors knock and I was told to run Kreen in the crankcase and tank (when it gets to 1/4 tank) I did that and when I changed oil it was very gooey and I was even able to fish out bearing Ball from my disintegrated Vacuum pump with a magnet tied to coat hanger. Kreen is a great tonic.I still have a quart but I am afraid to run it on CDI injectors. I will however run a quart through engine for 500 miles before oil change. Try that before you pour $$ into injectors. As mention by vw1300 the rough engine maybe the glow plugs. By the way Kreen is available only through mail from Kano Labs.
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06 MB E320 CDI 123k miles 14 Sienna (wife's DD) 36k miles 11 GL350 Bluetec 136k (Sold) 96 E300; 292k+ miles (Donated) 11 Sprinter 22K+ miles (Sold) |
#5
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I'll tell you one thing... With the plug unscrewed 1/4 of the way, the beveled flange on the glow plug body won't seat with the head, and carbon will be able to come up and around making it 1000x worse than it already is.
Start the car and take a short drive, then soak the plug with penetrating oil. Repeat that every day for a week. On the last application, try to remove the plug with the round out tool. You might have to JB weld a nut onto the end of the plug if it's too rounded. Be careful, go slow, wiggle the hell out of it back and forth to loosen the seized plug body, and keep at it. If you get it moving nicely spray more penetrating oil and keep working it. It will come out. The dieseling is probably a shutoff system issue.
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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it! '85 190D 2.2 Auto *Cali* (Blue/Blue) *sold* http://badges.fuelly.com/images/sig-us/302601.png http://i959.photobucket.com/albums/a...0/sideview.png |
#6
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I replaced all of the fuel injectors and while I was at it replaced the valve cover gaskets. Although it runs smooth as anything now, the acceleration is still just like it is in my youtube video. On the first launch after starting up it flies...then it holds out on the shifts and won't rev out.
The EGR system has been bypassed for a long time.
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2022 Nissan Frontier Pro4x 1990 Mercedes 420SEL 1950 Packard 8 Previous German cars- 2001 Mercedes SL500 1983 Mercedes 300SD 2011 BMW 328i (manual) 2008 BMW 535xi (manual) 2006 BMW M3 (manual) 1980 Mercedes 300TD 2006 BMW 750i 1996 Mercedes E300D 1994 BMW 740i 2006 BMW 330xi (manual) 1999 E300DT Smoke silver/black 253k 2012 BMW 535i Xdrive M-Sport 1984 300TD-T 304k 1988 Mercedes 560SEL (parts car) 2010 BMW 550i xdrive 2017 Audi A4 Presitge 1979 300SD 313k 2003 E500 189k |
#7
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Is check engine light coming on? I'm wondering if there is crack in boost hose that, after it leaks through, car reduces power after seeing low boost when there is supposed to be some. Sounds to me like you got a low boost issue.
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Jim |
#8
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No check engine light and no boost issues ..it's NA so there's no turbo
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#9
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I am not sure if fuel injection pump timing would do that or not.
Also could it be a issue with the transmission (I am assuming an auto trans)?
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84 300D, 82 Volvo 244Gl Diesel |
#10
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The transmission shifts perfectly whenever driving NORMAL.
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2022 Nissan Frontier Pro4x 1990 Mercedes 420SEL 1950 Packard 8 Previous German cars- 2001 Mercedes SL500 1983 Mercedes 300SD 2011 BMW 328i (manual) 2008 BMW 535xi (manual) 2006 BMW M3 (manual) 1980 Mercedes 300TD 2006 BMW 750i 1996 Mercedes E300D 1994 BMW 740i 2006 BMW 330xi (manual) 1999 E300DT Smoke silver/black 253k 2012 BMW 535i Xdrive M-Sport 1984 300TD-T 304k 1988 Mercedes 560SEL (parts car) 2010 BMW 550i xdrive 2017 Audi A4 Presitge 1979 300SD 313k 2003 E500 189k |
#11
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Also did a diesel flush prior to changing the injectors. Ran the car for an hour at various rpms on seafoam. After I did that, the dieseling stopped and it shuts down perfectly. I still can't get over how smooth the idle is in the car now. It's as if the engine isn't even running. I'd like to still get to the bottom of the acceleration issue, but it is running good though.
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#12
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I just remembered that a while ago I took out the bulb for my check engine light because it never shut off because I had to get a used cluster when my pixels all went on my factory one. I ran the codes through the climate control and one of the codes I get is...B1462 Wide open throttle (WOT) position signal diesel engines
Sounds like that could be the issue but I can't find a part for that? Another code is for the ECT sensor? |
#13
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The WOT signal in older cars depends on a microswitch in the throttle linkage; I don't know if your car's more-electronic setup detects full throttle that way or if it is electronic somehow. In any case, WOT is sent to the climate control so that the a/c compressor is turned off—the reasoning is that, at full throttle, maybe you are escaping from the bad guys and need all the power you can get.
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"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 |
#14
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I've narrowed down the issue to running the car on WVO. I just purchased a beautiful 1999 E300DT and it is like a race car compared to my N/A 1996 E300. I put about 5 gallons of WVO in it and it is doing something similar now. I think it has to do with the thickness and the fact that I have NO conversions whatsoever on the cars. I'm thinking if I put an in tank heater of somekind in, that will alleviate the issue. Any recommendations on one to get?
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2022 Nissan Frontier Pro4x 1990 Mercedes 420SEL 1950 Packard 8 Previous German cars- 2001 Mercedes SL500 1983 Mercedes 300SD 2011 BMW 328i (manual) 2008 BMW 535xi (manual) 2006 BMW M3 (manual) 1980 Mercedes 300TD 2006 BMW 750i 1996 Mercedes E300D 1994 BMW 740i 2006 BMW 330xi (manual) 1999 E300DT Smoke silver/black 253k 2012 BMW 535i Xdrive M-Sport 1984 300TD-T 304k 1988 Mercedes 560SEL (parts car) 2010 BMW 550i xdrive 2017 Audi A4 Presitge 1979 300SD 313k 2003 E500 189k |
#15
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It sounds like the tank strainer could be blocked.
WVO can act as a solvent pulling off the tank. lining or any crud that's built up over time. This was what mine looked like (this pic belongs to a friends car)
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David 1996 Mercedes S124 E300TD - 129k - rolling restoration project - 1998 Mercedes W210 300TD - 118k (assimilated into above vehicle) |
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