New to diesel, have a problem.

[AK_F250Diesel]

Also, when I put the pedal almost to the floor to apply a lot of fuel/power... It almost sounds as if im getting rod knock or something like it. It comes and goes. Otherwise the truck runs fine.

I will try the injector thing tomorrow after work as its dark out and too late to be starting that loud noisy beast up.

[AK_F250Diesel]

I wanted to thank you for all the help this far. Very helpful! So, I come from a gas background. How does the diesel ignite then if they don't have spark plugs?

Totally different engine designs all together. Learn something new everyday.

[chuckster57]

Originally Posted by AK_F250Diesel

How does the diesel ignite then if they don't have spark plugs?.

Diesel fuel ignites using heat and pressure. The glow plugs will preheat the cylinders to help with cold starts. Gas engines will have about 150 PSI in the combustion chamber, and a diesel will have over 400. There is enough residual heat to ignite the fuel the next time. You shut down a gas engine by removing the spark, you have to shut off the fuel supply to shut down your diesel engine.




Answered on my iPhone.

[AK_F250Diesel]

I think I am going to replace the rear injectors. I know the engine has around 150k or 250k miles and the injectors look stock. Same color as rusty old valve covers.

My odometer only has xx,xxx for place holders so I have no idea if its 150k, or 250k. Either way, its in need of injector replacement. I assume its like a regular gas engine, I can simply unbolt the injector. I dont need to remove the valve covers to replace the injectors.

i noticed it looks like they use copper washers to seal themselves in the head.

[chuckster57]

Yes the copper washers are used to seal the injector tip in the head, How have you determined that the back two are bad? No way to really tell just by looking, you have to take them out and have them "pop" tested. dirty/rusty on the outside is no indication of the wear of the internal parts.

[AK_F250Diesel]

Looks like the diesel is coming up from the injector tip itself. Copper isn't sealing.

[chuckster57]

Injectors are two parts, and it's possible that they are coming apart at the threads.


Answered on my iPhone.

[AK_F250Diesel]

Ok, so I removed the passenger rear injector... The one that looked like it was spitting fuel... Low and behold, it was exactly what I thought...




Notice anything missing?!?!?

Lol, I must have spent 10 minutes searching for that crush washer... Couldn't find one. I am surprised it didn't die sooner/notice the problem earlier.

Swapped the injector out for a new one, torqued it down to spec, started the pickup... Wala, after about a minute no more smoke and the truck has balls again!



Wanted to thank you immensely for all your help!

[chuckster57]

Good deal. That is one dirty injector.


Answered on my iPhone.

[mikeceli]

Originally Posted by LMJD

. Not being critical, but to avoid confusion here, at a parts house or wherever, the left side of an engine or anything else on a vehicle is always the drivers' side and the right side is the passenger side.

Not to put TOO FINE A POINT ON IT, standard in the auto industry is to refer to left and right from the point of reference, from the DRIVERS SEATED POSITION.

IE: In England, where they drive on the oppisite side of the road (than the USA) the driver is sitting on the RIGHT side of the vehicle. It would also be the RIGHT side, in the USA.

[85F350Guy]

My truck also has some trouble reaching 55, it is also my first diesel truck so im not sure. Should it have more power or is the top end 55ish?

[chuckster57]

Welcome to the Diesel Stop.

What Is your engine RPM's at 55 MPH?

Auto or manual transmission?