|
|
|
|
|
#1
06-30-2007, 02:18 AM
|
||||
|
||||
|
New Vapor-Lock-Acting Question
On hot days, if I'm at operating temperature and running at significant rpm (for this particular equation, significant rpm is pretty much anything over 2000-2500) and I allow the car's rpm to drop from that point down to idle (as in, roll suddenly up to a stop sign)(as in, throw it in neutral while at driving speed on the road) (as in, accelerate to move in stopped interstate traffic and then back off once i've pulled up in the line again) (as in, pull around a drive through and then stop at the window), it shudders, and frequently dies completely. idle is perfectly normal at all other times.
In a gas engine, my dad says it's vapor lock, fuel getting hot in the hot fuel lines and turning to vapor before it enters the cylinder. However... diesel has a higher flash point and shouldn't be volatile enough for that to be my problem... is it? It restarts flawlessly and immediately... but having it do that in heavy traffic is quite dangerous. How do I diagnose this? I've never heard of it in a diesel before. Fuel filters are good, I do know that much.
__________________
 ~Michael S.~ Past cars: 1986 300SDL 1987 300SDL 1982 240D 1982 300SD Current: 1987 300SDL 
|
|
#2
06-30-2007, 02:36 AM
|
||||
|
||||
|
sounds like your idle is too low.
__________________
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.
|
|
#3
06-30-2007, 02:37 AM
|
||||
|
||||
|
I've turned the 1-7 dial behind the fuse box up all the way to 7 to test it and had the same problem. Right now it's set to 4 where the service manual recommends - and if the tachometer can be believed, it's holding the factory rpm recommendation.
Thanks...
__________________
~Michael S.~ Past cars: 1986 300SDL 1987 300SDL 1982 240D 1982 300SD Current: 1987 300SDL
|
|
#4
06-30-2007, 03:21 AM
|
||||
|
||||
|
Is that dial the same one that's in that compartment on the passenger side kickpanel on late model W123? I was trying to figure out how to rotate that, it wouldnt budge.
__________________
1985 CA 300D Turbo , 213K mi
|
|
#5
06-30-2007, 03:40 AM
|
||||
|
||||
|
I have no clue, honestly. No experience with 123s or 617s except for admiring my friend's 300sd
__________________
~Michael S.~ Past cars: 1986 300SDL 1987 300SDL 1982 240D 1982 300SD Current: 1987 300SDL
|
|
#6
06-30-2007, 04:46 AM
|
||||
|
||||
|
uhm i think that... you are simply calibrating the tachometer... to turn up the idle you have to pysically with a screwdrive raise the idle screw. it should be on the IP be carefull though. it will snap off if your not gentle
__________________
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.
|
|
#7
06-30-2007, 09:14 AM
|
|||
|
|||
|
Quote:
|
|
#8
06-30-2007, 01:35 PM
|
||||
|
||||
|
Does that mean my computer's going bad and not properly re-idling immediately when it's called for?
__________________
~Michael S.~ Past cars: 1986 300SDL 1987 300SDL 1982 240D 1982 300SD Current: 1987 300SDL
|
|
#9
06-30-2007, 02:03 PM
|
|||
|
|||
|
Quote:
|
 |
| Bookmarks |
|
|
Linear Mode
