Hey guys quick question for ya, got everything squared away w/ the pedal assembly but now..... It runs great till i get up to temp and then it slowly looses power till i cant go much more than 30-35mph w/ a heck of alot of blueish white smoke and a miss that would make you think im missin a cylinder or even a couple cylinders, however at idle it runs fine w/ just a hint of a miss if any at all. I first noticed it as a very small barely noticable hesitation like its getting air/ running out of fuel 2 days later it graduated into a full blow junk runner as if it were a gas truck missing a couple plug wires. At first I thought blown head Gasket but do to the blueish tint of the smoke and the fact that im using no coolant I ruled that out. Is there a possibility that it could have blown between cylinders? I tried to check resistance on the glow plugs w/ no conclusive results. When i do so can I just ground on a good ground and touch the other lead to bullet connector on top of the glow plug? If so maybe ill give her another go at testing. Trying to check resistance on the plugs themselves w/ the engine runnin got a bit nerving not to mention it was fun trying to figure out how to get both leads in there just right and then doing so. I guess the next test would be to loosen all the injectors 1 at a time while running. Just trying to narrow it down to a cylinder or cylinders. Like I said it runs fine until I get warmed up to operating temp. Any ideas or advice would be much appreciated.

 

that doesnt sound good but i can tell you glowplugs have nothing to do with it,they are used for starting only.how does your oil look is it full?

 

I am a newbie, but I would say make sure you got the right oil in it. My truck runs like that minus the smoke when there is air in the fuel line.

 

sucking air and fuel pump going bad

 

Check and make sure your fuel filter is full. When was the last time you changed the filter.
What does your air filter look like.

 

I know it has nothing to do with glow plugs bro but on diesel you can use glow plugs sometimes to Identify a dead cylinder. Glowplugs are like little coils if u will i think im using the right word LOL im tired. Anyhow, they have a certain resistance when cold and in good shape. As you have them heating up the engine the hotter they get the resistance rises also. Same goes for when its running as the engine warms up and is running etc, the resistance on the glow plugs will change a bit. If you have a miss and test them all and notice 1 or 2 of their resistances are noticably lower than the rest, you can narrow it down to that cylinder not combusting/operating properly.

 

I never thought of using glow plugs that way....but I get the theory and its a cool thought.

I had a similar problem on mine a while back and it was a hard fuel line....one was cracked and leaking slightly, the other had some sort of gunk in it....replace the cracked one and used a compressor and atf to clean out the rest.

Deffinatly sounds like a fueling problem tho

 

Glow plug resistance is .5 ohm You would have to have a super good ohm meter to measure differences because of cylinder temps. it is much easier and more accurate to crack the injector lines to find dead or weak cylinders.

 

I agree...but some of us were geeks before we started sucking on diesel fumes....I have my Fluke sitting right here...

 

Well go and check your plugs, you can find a bad plug. it will either be open or over 1 ohm. now check them all again with a warm motor and the difference will be small or negligible. and may mean nothing. It is quick and easy and foolproof to crack the line nuts and be positive where the miss is.

 

Sorry star...I may be a geek and think the theory is cool, and even have the equipment to come up with accurate numbers, But honestly I think i would enjoy rotating the air in my tires more than trying to come up with conclusive results...especially if we are talking about 12v plugs.

The part I really liked was the remark about it being unnerving trying to test them on a running engine

 

I'd suspect either air intrusion, or the IP timing is retarded. Maybe both.

 

well see ive tested the pressure at the fuel filter header, and Its suppose to be between 4 / 6 psi and its at 5 so Im getting fuel up there. Just wondering if i have a bum injector or injection pump. Wouldnt that act up at start up and idle etc. Not just when its up to temp?

 

I know this is going to sound dumb but check the muffler.

 

not dumb. clogged exaust would cause crappy idle and stalling, even in gas motors.