will that get engine to run or is it a myth??

 

no its a good way to bend rods ,anything thats sprayed into the intake needs to be in the form of a mist or hydro lock will occur and remember a little bit goes a long way on diesels

 

Well, it might but the equivalent of the ignition timing like the spark plug in a gas engine, in the 6.9/7.3 diesel is the fuel squirting into the pre-combustion chamber onto the hot chamber air and onto the hot glow plug.

So fuel already in the chamber (assuming it's not enough to cause hydrostatic lock) might pre ignite as it's compressed with the air, there by attempting to stop the engine and spin it the other way around bending rods and cracking pistons.

 

There are examples of low compression diesel engines that use throttle body fuel injection and spark assist ignition. The example I saw was intended as a multi fuel engine, and ran best on gasoline, or diesel under constant RPM.

Getting the fuel to ignite at the right moment in a high compression diesel like the 6.9 is going to be nearly impossible, without some sort of ignition system. Although having said that, cheap glo engines like what are used in gas powered RC planes are self ignition engines, hopelessly inefficient though.

 

I was just wondering. Every now and again i see an ad for a truck that read won't start needs injector pump but runs when diesel is sprayed into intake or run on ether. I guess they are full of sheet. Anyone have any injector pump parts? I need the advance mechanism.


thanks

 

cuz you should just cough up the $ and get an ip. idoits like that have absolutely no clue how to take care of a diesel. and they probably ruined that one by never changing the fuel filter or running trashy fuel from some corner store that sold diesel one time a week.

 

My thoughts on spraying diesel in the intake.
Not that I would recommend it, I would say it could be possible with a cold engine.
The compression ratio would barely make enough heat for the fuel to auto ignite.
That is why we need glow plugs.
It would probably not ignite the fuel to far BTDC.

But as fast as I say that, I will also say that there is only about 35 thousandths clearance between the piston and head.
A bit to much liquid and you will be hydro locked.

Ether, yes it will start on ether, but improper use of ether can also cause expensive damage to the engine.

Glow plugs are much safer and cheaper.
Injection pumps and injectors both are cheaper than a set of pistons installed.

 

asking for people with knowledge. I heard those injectors spray under around 20,000 lbs of pressure inorder to get the diesel fuel atomized enough so it will ignite easy. Like a kerosene torpedo heater???

So i thought there's no way it's running off of a spray bottle into the intake, but then i thought maybe if it's a fine mist it may work.

My friend was getting anxious to see if truck runs i told him whatever he does don't spray either in it , it will blow the motor up. I told him some people spray not squirt diesel or wd 40 into the intake while cranking it over. but i don't know if it works or if it can damage the engine. So i asked you guys to get more info.

I think i found out what the problem is. The advance arm fell off or someone borrowed it. with the arm missing the spring pressure forced out the plug seal in the seal pin. So that maybe the problem. My bud also said since he cranked it over fuel shot out from the hole in the plug and is all over the manifold so hopefully the pump is still good. I'm going to try to get those parts before shelling out big bucks for an injector pump.


thanks all

 

Is this place near you? They have a injection pump for $150.00. Go to www.car-part.com and plug in some info. I used a 89 f250, northeast area, fuel injection pump, and selected 1985 thru 1993. This place is in New York. I thought in another post, you said you were in Ohio, but your info says New Jersey. Anyway, this site might dig up a used pump you could get parts from.


1985
Fuel Injector Pump
Ford Truck F250 6.9 DIESEL,INJ PUMP,T-07432X-DO FOR $150 All American Auto Wreckers USA-NY(East-Patchogue) E-mail 1-631-286-5500 / 1-888-748-5924

 

Best trick for something like that, take a gasoline soaked rag and hold it over the intake, or spray ether on a rag. The key is the engine will suck in JUST enough to fire, as opposed to spraying something, where it will suck in however much you spray.

 

actually the injectors break pressure or what some call pop off is 1400 to 1800 psi

 

Those "Multi fuel" Diesel engines just hold one of the valves open a little longer to bleed off compression to run Gasoline as Diesel fuel does not burn well with just a spark, all the air needs to be hot as all get out to burn well, or a decent hot spot like the glow plug!

You see how crappy a cold 7.3 runs with only the glow plug "sparking" off the fuel mixture.

And the thing about WD40 into a cold or slow cranking 7.3/6.9 is that the gas they use as a propellant helps ignite the cold air and fuel mixture at a lower temp, but it's not as violent or destructive as either.