Hey hi fellow four banger diesel fans

I have run 100% homemade biodiesel since Spring in my Trooper with 225k mikes. Lately I have notices a lack of power.
Biodiesel season is pretty much over here in northern New Mexico, so I'm switching to dino diesel, a mix at first, then straight diesel probably by December. I replaced the fuel filter when I noticed the power loss, it wasn't really bad, and didn't make much difference afterward. Other symptoms are increased smoke, on acceleration, not much but it didn't smoke at all when I bought the truck this time last year.
I'm beginning to suspect my injectors need cleaning and pop pressure testing. I do computer work for a diesel mechanic , I was thinking of asking them to pull the injectors, or is this something I should do myself and just bring the injectors to the shop? In fact I can remove the injectors from the other Trooper I have and get those checked or put them in the Trooper I drive. Normally I do all my own mechanicing, so I feel a little weird going to someone else's shop.

Usually black smoke from a diesel means too much fuel or not enough air. Silly question, but did u check/change the air cleaner?

Hey OB how are things in NM? Being a big Bio and SVO runner I suspect you have developed a little coking on the tips which cleaning can take care of. With that said if you have got some miles on those injectors it's probably time to re-tip them and enjoy the smooth power you forgot about 20 years ago. It's not a big technical project. If you get the interest I can direct you to a site that has a play by play picture DIY of injector rebuild.

hey i think mine is doing the same, not as much power, but really what i'm noticing is a drop in mileage, think i am only getting approx. 20 miles per gl. added a roof rack, but also added a spoiler on it too so that should lower it, but am sure when i got the truck this past july, was getting low thirties hwy/town. also running B100 since i got the truck. any ideas on this ? injectors cleaning too? what is that DIY site to fix/clean these. thanks. mines got 246K on it and other that that, cruise's 65-70 all day no probs, love this truck. thanks

Thanks
If you can believe this I replaced the air cleaner and instantly better engine performance, duh? The engine runs better but I still hear and feel a flat spot around 2400rpms which looses smoothness. Let me see if I can describe it. Rev the engine when warm, and all four cylinders sound clean, then at the same rpm the exhaust sound breaks rhythm and engine rpm slows. I have several books for this Trooper, to me this does sound like poor injector spray pattern or wrong pop off pressure. I like to have alternative sources of info, so yes please, post the link.
I have read through the factory manual on cleaning the injectors. I think I'll invest in the proper tool for testing the injectors. I think someone posted a link to a Harbor Freight or Northern Tools injector pressure tester that'll work. But finding it again... <img src="/forums/images/graemlins/baby.gif" alt="" />

Oh yeah things in New Mexico are looking up, we finally got a little snow on Thanksgiving evening, as if we had appeased the god(s), with thanks, smiles. So we are feeling much better now that the three month drought is over and ski season began as advertised on T-Day.
Dang air filters.
Seems is doesn't matter the level of expertise we posses, we all need to be reminded to check the filters, hey.
I seem to have crossed a mental barrier this week, I have moved parts from my cherry Trooper to the Trooper I work: Air duct to turbo, air cleaner, drivers seat, wheels and tires, tachometer, oil pressure gauge, does the list go on? Or will he actually find a way to repair the loosening timing gear / crankshaft issue? Tune in next time.

Yes it's easy to overlook things AND to over complicate a repair. I had an ABS light come on - spent almost two weeks troubleshooting the entire system to no avail. My son mentioned that my third brake light bulb was out. BING it dawned on me, when I was replacing bulbs in the instrument cluster I inadvertently plugged the Light Failure indicator bulb into the ABS slot. DUH ME

yeah I hate when that happens! <img src="/forums/images/graemlins/sleeping.gif" alt="" />

Whether Global Warming is man made or not this weather is totally freaky. December 1st 2007 at 7200 feet above sea level Goggle map "87745" it's been raining all night long. Never in over thirty years of living up here in the mountains have we seen this!