can you flud a diesel by pumping the peddle to much

[ray m]

THIS MOURNING MY WIFE COULDN'T START THE CAR . I PUT JUMPER CABLES AND IT TURNED OVER BUT WOULDN'T START AS I KEPT THE PEDDLE DOWN. iT SOUNDED LIKE IT WAS FLUDED. I TERNED IT OVER AGAIN AND IT STARTED SOON AFTER. IS THIS CAUSED BY SOMETHING PARTICULAR. OR COULD IT BE COINCIDENTAL. I'M CONFUSED. I CHANGED THE INLINE FILTER 4 DAYS AGO AND IT DID HAVE SOME RESIDUE IN IT,BUT NOT ENOUGH TO CLOG IT. ANY THOUGHTS OR SUGGESTIONS. HOPEFULLY ONLY THE BATTERY. RAY M

[79300sdtd]

i would think you can flood a diesel don't know for sure. Have you checked your spin on filter? Did you see any air in the prefilter (the clear inline one)? How are your glow plugs? What is the model, year, and approx miles?

The injection pump always gives full fuel until the engine gets running above a certain RPM. Pressing the pedal makes no difference in starting.

BTW, turning off the caps lock will get you more responses. Most people will not even bother to read a post in all caps.

[ray m]

Originally Posted by 79300sdtd

i would think you can flood a diesel don't know for sure. Have you checked your spin on filter? Did you see any air in the prefilter (the clear inline one)? How are your glow plugs? What is the model, year, and approx miles?

Got it no caps.
It's a new car for me. I am planning to change the spin on filter when i can get to it. There was a small bubble at the top of the pre filter btt not in a position to cause any trouble. I've changed a hundred pre filters in the last 30 yrs. The glow plug light glows bright so i would think they are fine. It is a 1984 240 d euro with 163000 miles. It was kept up greatly. Does it sound like the tank filter is clogged. Could the starter cause this. RAY M

[yellit]

I had to jump in here to see if I can help another Louisiana guy.... not too many of us end up here....Swap that spin-on filter first...that thing can do just what is going on...get you a couple of them in case you get stuck somewhere....The glow light can be misleading....I pulled all of my glow plugs and powered them up to see if they were glowing like they should...I had two bad ones with the light looking like it was ok....does it run good once you get it going...?...You could always put you a 2 liter bottle of diesel in the engine bay and stick the fuel pickup and return hoses in to see if it does better for a test of the fuel tank screen .... On the way to St.Francisville tomorrow....post back if all that does not help...lots of good folks that will help here....Cheers!....kevin

[ray m]

Originally Posted by yellit

I had to jump in here to see if I can help another Louisiana guy.... not too many of us end up here....Swap that spin-on filter first...that thing can do just what is going on...get you a couple of them in case you get stuck somewhere....The glow light can be misleading....I pulled all of my glow plugs and powered them up to see if they were glowing like they should...I had two bad ones with the light looking like it was ok....does it run good once you get it going...?...You could always put you a 2 liter bottle of diesel in the engine bay and stick the fuel pickup and return hoses in to see if it does better for a test of the fuel tank screen .... On the way to St.Francisville tomorrow....post back if all that does not help...lots of good folks that will help here....Cheers!....kevin

It runs good after starting. I think you're right. I have an extra but can't get to it until friday. since it's new to me I think a purge, a glow plug test,and a new tank screen and oil change will all be in order as i get time. Thanks for the local support. Lafayette,La Country Area.

No need to get a new screen unless it's damaged. It can be easily cleaned.

[winmutt]

Originally Posted by ForcedInduction

No need to get a new screen unless it's damaged. It can be easily cleaned.

You can swap the feed and return lines and drive it around for a day. That will clean the screen and buy you some time (forever).

[Shorebilly]

I don't think it's possible to flood a diesel engine, if the engine is in good running order.

When one "Floods" a gasoline engine.....a carbureted gasoline engine....when one pumps the accelerator/gas pedal, there is a pumping device within the carb (accelerator pump) that squirts a bit of fuel into the manifold every time that the pedal is pumped.....flooding is the condition of having a fuel /air mixture that is too rich for combustion.....

I don't think that flooding of a "Fuel Injected" gasser is possible either....given that the computer and associated sensors are in good order.....because no fuel is injected until the computer allows it.....pumping of the gas pedal has no effect here either.....some of you ASE folks should maybe describe this a bit better than I.....but if one reads the owners manual of a gasoline FI car or truck, it should tell you NOT to touch the accelerator until the engine catches and runs......

A mechanical FI Pump....like the ones on the OM617 and earlier engines....no fuel is injected until the engine actually cranks....because there is no motion within the FI Pump (Plunger/Barrel) until the engine is rotated thus rotating the FI Pump.....yes the fuel rack will be at maximum fuel for starting, but pumping the accelerator pedal does nothing in way of adding fuel to the cylinder.....

Now if you have a low compression or extremely cold diesel engine.....and you crank the engine excessively, you can wash the lubrication off of the cylinder walls and get fuel into the lube oil as the fuel builds up in the combustion chamber.....the compression forces the unburned fuel past the compression rings....

[Shorebilly]

Originally Posted by winmutt

You can swap the feed and return lines and drive it around for a day. That will clean the screen and buy you some time (forever).

In general most "return" fuel lines go back to the top of the fuel tank.....I have never laid eyes on the fuel connections of a Mercedes Fuel Tank.....but I can't think of any other applications that I have seen where the return line goes to the bottom of the tank......

SB

[Stevo]

Originally Posted by winmutt

You can swap the feed and return lines and drive it around for a day. That will clean the screen and buy you some time (forever).

If you do that be sure and have more than a quarter tank of fuel, as thats about when your engine will stop using the return line to supply fuel.

[tangofox007]

Originally Posted by ForcedInduction

BTW, turning off the caps lock will get you more responses. Most people will not even bother to read a post in all caps.

internet etiket is amazin u kan mis-spell every thurd wurd don't not never uze gud grammur & kompletely fale to uze punctuation and it's totalllly acceptable (or, as some would say, exceptable) but watever u do dont use no KAPS!!!!
folks wil think u got no cents

[Shorebilly]

Originally Posted by tangofox007

internet etiket is amazin u kan mis-spell every thurd wurd don't not never uze gud grammur & kompletely fale to uze punctuation and it's totalllly acceptable (or, as some would say, exceptable) but watever u do dont use no KAPS!!!!
folks wil think u got no cents

Yup......no caps....that be shoutin' son.......

SB

[mobetta]

Originally Posted by tangofox007

internet etiket is amazin u kan mis-spell every thurd wurd don't not never uze gud grammur & kompletely fale to uze punctuation and it's totalllly acceptable (or, as some would say, exceptable) but watever u do dont use no KAPS!!!!
folks wil think u got no cents

LMAO....

[spark3542]

Originally Posted by ForcedInduction

The injection pump always gives full fuel until the engine gets running above a certain RPM. Pressing the pedal makes no difference in starting.

I'm confused on this one. I absolutely see a difference in starting when I have some pedal depressed. I purchased my 83 300SD in the summer and it started fine no pedal, idled about 400 rpm indicated (which seems mightly low to me from my gasser experience). As the weather began to cool off in the fall, it would start, run about 2 seconds and die. Start again and run fine. When it began to stall twice, I decided to add a little pedal (about 1/4) while starting and it made a huge difference. I would only have to start it once. If it was a really cold engine, it would start, cough and sputter for about 5 seconds, then come around.

My experience certainly indicates that mine is not getting full fuel at start with no pedal depressed. Is there something wrong with my system?

Mark