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#1
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84 300d hard start warm
I just got the car.
The engine sounds and drives very good; smooth and quiet, scored really great on emissions, %3 opacity. The problem: when warm, if I shut it off for more than a few seconds it won't start, like it's not getting air; egr maybe? If I wait for about 15 minutes, It will then fire just fine with a bump of the key. I figured out, through necessity, that I could repeatadly bump the key to get a start after 5 or 10 bumps, but had very little power with that method, (lack of turbo?). this sound familiar to anyone? thanks first post |
#2
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anyone?
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#3
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You need air, fuel, heat and cranking speed to start these puppies. You should have enough air and heat so that leaves fuel and cranking speed. Check these two items out making sure you don't suck air in the fuel line and that the starter doesn't slow down when warm.
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1977 300D Lost coolant while someone else was driving 1983 300D Can't run without oil 1985 300SD (gone but not forgotten) 1990 300TE 4matic Sold 1991 Yamaha Venture 1975 Kawsaki 250 triple 1974 Honda 200CL 1951 8N Ford 2008 Wildfire 650C |
#4
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I tihnk it's air related
Quote:
no leaks, nothing wrong with the ip. I suppose there could be a lift pump problem that I haven't considered. It is only when warm and only for about 10-15 minutes after shut down. then it starts and runs nice and tight like before. And thats why I think there is something cutting off the air. do these have an anti shudder valve? or and air cut off mechanism to protect from runaway engine that could be malfunctioning? does the egr on these act as an air cut off for smooth shut down? maybe it is sticking till it cools a bit. is this not common?
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The modern conservative is engaged in one of man''s oldest exercises in moral philosophy; that is, the search for a superior moral justification for selfishness. -John Kenneth Galbraith |
#5
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Your 617.952 engine should have nothing but the air filter in the way of the air coming in to the engine. There is an EGR valve (if you have not removed it) but it should not affect starting at any time. There are no "anti shudder" valves, whatever they are.
We have had a number of people lately with starting problems; the common thread in all seems to be WVO or some other kind of "alternative" fuel.
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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 |
#6
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I have a Federal 300D and it is easy disconnect the EGR to rule that out as a source of problems.
The next time your engine is good and hot stop the car open the hood and carefully pull off the vacuum hose that goes to the Fuel Injection Pump Vacuum shutoff; deactivating the Vacuum shutoff. Try starting your car. If your car starts normally there is a good chance that that you have a vacuum problem somewhere in the system that is not allowing the vacuum to bleed off from you Vacuum Shutoff keeping it in the OFF position. If you have the Factory Manual look in the section where the Ignition Switch Lock is. There is a picture there that shows the vacuum valve that shuts off your engine connected to the ignition switch. I am guessing that there could be a possible source of the problem.. As far as a device that protects the engine from running away; the Governor inside of the IP is supposed to keep it from revving at an unsafe speed by cutting back on the fuel at high rpms (assuming no one has messed with the adjustment); but it is still will rev high enough that it is scary when the engine takes off.
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84 300D, 82 Volvo 244Gl Diesel |
#7
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an old gas pickup of mine was like that turned out to be a tired starter that had to cool down
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commercial fisherman diesel in my blood in my boats trucks and Dear old Dad has had me drivin them since i got my first license in 1968 1986 300 SDL 427654 1999 Chevy Crew Cab Dually 225423 1986 300 SDL 287000 Dad's 1987 190 Turbo 158000 Mom's (my inheritance) |
#8
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the starter turns fine. the fuel pumps fine. I'll find the answer and let you know. anti sudder valves are part of many new egr valves. they close off the air supply on shut down to prevent the engine from shuddering to a stop. they also allow you to turn the engine off with the key in the event of a runaway.
__________________
The modern conservative is engaged in one of man''s oldest exercises in moral philosophy; that is, the search for a superior moral justification for selfishness. -John Kenneth Galbraith |
#9
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Quote:
__________________
The modern conservative is engaged in one of man''s oldest exercises in moral philosophy; that is, the search for a superior moral justification for selfishness. -John Kenneth Galbraith |
#10
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you were right Diesel911, that valve was da ting.
Now I have to figure out why it doesn't release vacuum when it is supposed to. Any idea there?
__________________
The modern conservative is engaged in one of man''s oldest exercises in moral philosophy; that is, the search for a superior moral justification for selfishness. -John Kenneth Galbraith |
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