I fear my lack of top end power on my 02 7.3l is because of fouled injectors. Just wanted to know if anyone has experience in cleaning them.

I rigged up a way to direct feed some Seafoam injector cleaner directly through the WVO fuel system. I varied the rpm range and ran it for what seemed like an eternity. No extra soot out the pipe or anything else. The truck seemed to run fine before... and I couldn't tell much difference after.

I've been considering some chemical injector cleaners but have been chicken to try stuff right out of my own lab. My father almost ruined 310hp turbocharged airplane engine doing this stuff about 25 years ago!

Here are some points to consider: If you see soot out the pipe during a chemical cleaning (with the engine running), it probably won't be black. WVO has no sulphur and that's what causes black smoke in diesel. Are you running through your stock filter? Does your system have a pressure regulator and return line? My WVO system is a direct feed with no return. That means all of the Seafoam was going directly into the engine. On a stock fuel system, about 80% of the fuel pumped is returned to the tank. That means most of your injector cleaner just goes back into the tank where it is diluted.

By the way, my Powerstroke ran just fine on straight Seafoam.

quote:

WVO has no sulphur and that's what causes black smoke in diesel.

Then why do big rigs (highway tractor trucks) still belch big black clouds of smoke when they're pulling off a read light?

I heard that the black soot is super fine carbon particles-ULSD is a hydrocarbon, so that makes sense to me. It was also mentioned that if an engine was blowing a lot of black, then it was suffering from poor combustion or overfuelling.

That's what I heard, anyway...