hey thanks mjunk1, i found the pdf only minutes before u posted it! so i need to clean the screen canister yet, but the little screen in the port that goes into the bowel i found, it was quite dirty so i cleaned it, made no difference though.

 

so i did this "test", if i rev it up real slow its starts stumbling bad around 27-3000, once it hits 3k then it smooths out. if i slam the pedal down fast it really stumbles at 2400-3000ish, white smoke when stumbling, smells like unburned diesel.

 

Try using a temp gun on exhaust outlets. Smoking and clearing when floored sounds like a (or more)bad injector. Mechanical diesels "generally" only have two problems. Cranking and fuel. If it cranks and runs but not well then you have a fuel problem. (putting aside any mechanical failures and excess wear, rings valves etc)

 

ive been going through old threads on here and it seems to be boiling down to injector o-rings or the injectors themselves. was hoping for a quick fix but it doesnt look that way.

however i will still try the cam sensor first before digging into injectors.
should i have to replace injectors, upgrade right away?? go original?? best/cheapest place to order?
thanks to everyone helping me trouble shoot this

 

Don't do all injectors. Use a cheap laser temp gun from any do it yourself store. Find the cold exhaust port. Once it's ran a few minutes you should see a very close range on all the outlets but the bad ones will be cooler. Injector seals and seats tend to also give it a hard start also. Sounds like a poor injector or two. Maybe all bad but unlikely.

 

I disagree. Replace all the injectors if that turns out to be the problem.

 

I do tend to agree with you. At work I do things that way because it's someone else's money. Being a mechanic and not independently wealthy. For myself I replace things only if they are bad. And if it can still be used I use it. I'm so bad in fact that I'm guilty of using brake shoes and pads off a parts truck. Understand though. You guys pay ten bucks for a parking cable at rock auto. In Canada that same cable is thirty. NAFTA ****ed us right up the ***. My 80 gallon compressor I got at menards and hauled it back here for 350. Same compressor up here is 999.99 plus 14% tax.

 

I thought NAFTA was supposed prevent stuff like that. It bent us over too. All our jobs keep going overseas to asian countries where they pay their employees about $5 a day. That process is about to be even further accelerated by our goverment hijacking our health care.

I used to replace stuff only went all the use was out of it too, but as time went on I realized that you don't really save that much money because just a month or two down the road something breaks that I should have replaced. Then you have to tear it all a part again. Its really just a preference thing, but to me only doing it half way won't save you any money. It'll just cause more stress and more time under the hood.

 

Wise words spoken.

 

It would be beneficial to buy a scan gauge and do a few tests to try and help rule out injectors. It could be just o rings. If my math is correct you only have about over 100k miles. As long as the truck was maintained, injectors typically don't go out till 225k+ range. I'd start with o rings, but it would suck if you have to turn right back around and do injectors; replace ALL at the same time if you go that route. Upgrade at the same time.

 

I think he said auction sale right. If your mechanicly inclined those trucks are deals. If not they have been driven like they were stolen by some kid. And even with proper maintenance. Our trucks gets oil fuel and a once over every 250 hours. And I wouldn't give you my hat for anything from our fleet.

 

If you can afford it, then I agree that you can't hurt yourself by digging into the injectors once and upgrading while in there. That's my plan this fall!

 

it has low miles, buuuuutt, i know where this truck came from, small oilfield town that has alot of little dirt roads. iam guessing this truck has a lot of engine hours vs miles, probaly idled all winter and just putted along the roads.

right now i cant afford injectors, i did the manifold check with laser gun and there where a couple a cylinders that didnt heat up as fast and one that seemed to be dead. anybody ever had any luck with a good dose of injector cleaner??

 

yes, thats the key word, "auction sale"! i love bargin hunting at auctions, its where i buy all my trucks lately. buy em cheap, fix em up, drive for a year or 2, sell it for the same price. paid $1900 for this dually with a nice flat deck on it.

i made the mistake of buying a "nice" truck of a dealer for around 20k once. they still break down and after driving a few years its worth a couple grand, thats it. (our vechicles rust out fast up here)

 

Its hard to go wrong for that price. If you really plan on selling it in a year maybe replacing just 1 injector wouldn't be too bad of an idea.