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  #1  
Old 06-23-2009, 10:30 PM
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Problems starting with warm engine

My 1998 E300 TD (W210) starts fairly well on a cold engine, but on a hot engine it can take up to 60 seconds to start!

We've replaced countless things, including all o-rings, most of the hoses and connectors, and even the electro hydraulic shutoff valve.

This problem is still happening.

Anyone seen this?

ANy ideas?
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  #2  
Old 06-24-2009, 06:58 AM
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Prolly the Injection-Pump....
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Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....
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  #3  
Old 06-24-2009, 09:08 AM
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hmm. thats what i was afraid of. is it just gaskets / o-rings in there, or would it need to be mechanically rebuilt / replaced?
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  #4  
Old 06-24-2009, 09:14 AM
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whunter knows a place that rebuilds them if this is problem but you may not need it rebuilt. More experts here than me. Hope you get the answer and I hope you don't need a rebuild.
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  #5  
Old 06-24-2009, 10:49 AM
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mmmmmm Diesel...
 
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What fuel are you using? Is it hard to start warm on pump diesel as well?
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70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

03 VW Golf TDI 5 speed 372K Miles

RIP--Lost in fire...82 300D 322K was My Daily Driver-On the search for a w126 now...

90 Dodge D250 5.9 Cummins/5 speed. 350K
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  #6  
Old 06-24-2009, 08:34 PM
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I haven't been running biodiesel lately, just diesel and WVO

i've got a frybrid system in there, and the strange thing is that when i switch from diesel to VO, it doesn't miss a beat. But when I switch back from VO to diesel after running hot, the car often stalls (and will take 90 seconds of cranking to start), the fuel line seems to have lost pressure.
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  #7  
Old 06-24-2009, 10:14 PM
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I would establish if the injection pump is still good. Try feeding injection pump from a can with vegatable oil. Turn engine off when up to operating temp and see if it will start again. If it does repeat the proccedure with straight diesel from a can as well. .

If it will start cold with the diesel but not hot. First check for overflow from the relief valve as that fuel flow cools the injection pump. Find and repair the reason the pump is not cooling properly but it may be too late.

The second test is basically to eliminate any presence of air when feeding with diesel. If it will not pass the second test and there is good overflow from the return line it could be the injection pump has been trashed.
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  #8  
Old 06-25-2009, 12:44 AM
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2 or 3 valve frybrid?
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82 Benz 240 D, Kuan Yin
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You're four times
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have an accident
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  #9  
Old 06-25-2009, 06:51 AM
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How do you Dry your WVO..?

Settling is NOT enough, settling will not remove the entrained moisture that will corrode the elements in the pump on a microscopic level. The FFA content also adds to the problem by making this entrained moisture Acidic...

--The running clearances of diesel-pumps are mega-precision and even surface-corrosion of those plungers/elements will mean they become toast....

As a test, When its hot, and the fault occurs, Cool down pump with hose-pipe and try and re-start. If starts reasonably easily, then there is your fault. Pump elements destroyed by 'wet' veggy...
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Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....
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  #10  
Old 06-25-2009, 07:31 AM
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I don't know the 96-99 E300D plumbing, I hear it's mad complicated. Hit frybrid.com regarding this, Chris or VinDiesel will prolly have a clue.


Some guesses:
Turn off the frybrid. Get it started on D2, let is sit overnite.
Cold start on D2, drive around on D2, hot start on D2, warm start on D2.

If it behaves on D2, I would look for an air leak causing you to lose prime on the diesel supply line, maybe at the supply valve. If A FEW psi of air in the diesel tank fixes this, that would support the hunch.
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82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times
It's hard to
more likely to
concentrate on
have an accident
two things
when you're on
at the same time.
a cell phone.


www.kiva.org It's not like there's anything wrong with feeling good, is there?
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  #11  
Old 06-25-2009, 07:45 AM
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I've contacted the frybrid guys and I guess they're very busy because i'm not getting the help i need from them. Here's my thread I've been updating for 2 months:

http://frybrid.com/forum/showthread.php?t=13804

This install was actually performed by Chris, my car is the green E300 on his web site.

My WVO is professionally cleaned by the guys at Diesel Green Fuels. THey've been doing this for years so I trust that they know what they're doing. Besides, if I take VO out of the equation, if I don't even switch over to VO at all, the car will have the same startup symptoms:

Cold start: 3-6 seconds of cranking
Warm start: 6-9 seconds of cranking
HOT start: 60-90 seconds of cranking
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  #12  
Old 06-25-2009, 08:05 AM
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Quote:
Originally Posted by veggiebenzE300 View Post
I've contacted the frybrid guys and I guess they're very busy because i'm not getting the help i need from them. Here's my thread I've been updating for 2 months:

http://frybrid.com/forum/showthread.php?t=13804

This install was actually performed by Chris, my car is the green E300 on his web site.

My WVO is professionally cleaned by the guys at Diesel Green Fuels. THey've been doing this for years so I trust that they know what they're doing. Besides, if I take VO out of the equation, if I don't even switch over to VO at all, the car will have the same startup symptoms:

Cold start: 3-6 seconds of cranking
Warm start: 6-9 seconds of cranking
HOT start: 60-90 seconds of cranking
TEST the WVO for moisture....

Use an old fry-pan, get it good and hot, pour a table-spoon full of WVO into the pan...

IF it spits/crackles and steams, you know its damp and needs further processing...

It should just 'shimmer' and smoke when really hot, and never spit or crackle...

Never take the word of an Oil Recycler that oil has been 'processed'....
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Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....
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  #13  
Old 06-25-2009, 08:27 AM
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Quote:
Originally Posted by veggiebenzE300 View Post
This install was actually performed by Chris, my car is the green E300 on his web site.

My WVO is professionally cleaned by the guys at Diesel Green Fuels. THey've been doing this for years so I trust that they know what they're doing. Besides, if I take VO out of the equation, if I don't even switch over to VO at all, the car will have the same startup symptoms:

Cold start: 3-6 seconds of cranking
Warm start: 6-9 seconds of cranking
HOT start: 60-90 seconds of cranking
Ouch. What alastair said.
__________________
CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times
It's hard to
more likely to
concentrate on
have an accident
two things
when you're on
at the same time.
a cell phone.


www.kiva.org It's not like there's anything wrong with feeling good, is there?
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  #14  
Old 06-25-2009, 08:35 AM
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Posts: 1,784
That's pretty attentive for Chris. He had a good idea about parking on a hill. Try backing it up on ramps if you can and do a hot and warm start, or back it up on a curb and try the same.
__________________
CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times
It's hard to
more likely to
concentrate on
have an accident
two things
when you're on
at the same time.
a cell phone.


www.kiva.org It's not like there's anything wrong with feeling good, is there?
Reply With Quote
  #15  
Old 06-25-2009, 11:28 AM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,872
My OM617.95x stars in two seconds or less, hot or cold, on B100 or D2.
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RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

03 VW Golf TDI 5 speed 372K Miles

RIP--Lost in fire...82 300D 322K was My Daily Driver-On the search for a w126 now...

90 Dodge D250 5.9 Cummins/5 speed. 350K
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