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98 E300 DT shut off delay
I have replaced the shut off valve twice along with all of the plastic fuel lines. The engine takes and extra 1-2 seconds to shut off and usually revs up a bit before the shut off occurs. The problem with this is that it throws a CEL and won't pass California smog. I'm wondering if the lift pump may be weak and causing this problem. Any suggestions?
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Andrew Villasenor 805-720-5057 1984 300D turbo 5-speed manual(daily driver) ALL MY DIESELS RUNNING WVO Everything is for sale for the right amount Ebay Store |
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My 97 has a similar problem intermittently. It triggers code P0200. I would just delete the code and immediately smog it.
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CENSORED due to not family friendly words |
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I think you must drive around long enough for codes to reset first.
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#4
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What is the shutoff system in this car? Is it a vacuum pod like the older ones, or is it a solenoid?
If it's a vacuum system, have a helper shut the key off and see if the stop lever immediately pulls down (if there is one). If it's slow or lethargic, it might be time to check the vacuum system out for leaks. Could be barking up the wrong tree - I'm not familiar with the later cars.
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Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#5
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I have to drive the car long enough after CEL reset to clear the EGR monitor, and that can take a while. The CEL will come on after 1 day of driving. It has an electric solenoid that cuts fuel. The solenoid has 3 lines attached to it. My understanding is that the lift pump provides negative pressure once the valve closes, in order to shut fuel more quickly. I may be wrong on this, but I'm going to take a $130 gamble and replace the lift pump. I'm not sure what else it could be.
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Andrew Villasenor 805-720-5057 1984 300D turbo 5-speed manual(daily driver) ALL MY DIESELS RUNNING WVO Everything is for sale for the right amount Ebay Store |
#6
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The CEL resets immediately and needs a few cycles before it pops up again.
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CENSORED due to not family friendly words |
#7
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The shut-off is electrical, not vacuum.
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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 |
#8
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Are you sure the solenoid isn't gummy and otherwise hanging up? If it isn't fully closing, you can bet the car will take longer to stall.
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Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#9
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When you clear codes you also clear the "I/M Readiness" flag. That flag takes several drive cycles to reset back to normal. You cannot pass smog unless you are clear of all codes, and your I/M Ready flag is true. This prevents you from pulling the trick of clearing codes right before entering the test.
The other thing in the fuel flow chain are the fuel filters. Have you replaced the o-ring that seals the top of the pre-filter (on the top side of the main filter stand, a hose plugs into the top of it). That o-ring can be a source of trouble.
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The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#10
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Quote:
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Charlie --------------------------- '66 VW 1300 96K miles '97 E300D 239K miles '85 300D 203K miles (sold Sep 2012) |
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