White Smoke

[captain71c]

That was my thinking. A critter or a left over rag got pulled into the intake manifold. I once found a whole box of candy canes that had been pulled into the air cleaner of a fire truck that I was working on. (Santa tours at Christmas).Stranger things have happened. It comes down to the three things that an engine needs to run. A source of ignition(compression,Heat), Fuel at the right time and in the right quanity and air. The amount of white smoke makes me think an air or over fuel problem.

 

[BigAl]

You are right . I stand corrected . I was just locked into a "excess fuel" mindset and never thought about the air supply . Would not the tractor tend to produce more of a black smoke than white if it was a air flow problem ? Just a thought .
Big Al

 

[Lenarguy]

I would recommend that you get the compression tested. Make sure that you have good compression in this cylinder before you remove the pump. When you crack the line does it seem like the same amount of pressure as the other line?

 

[normde2001]

"I left the muffler off and after a couple minutes running, diesel trickles out of rear cylinder exhaust port."

Considering that the rear cylinder does not fire at all, that seems to eliminate fuel and muffler as the problem, leaving only air intake and compression.

 

[chriswheeler]

Have you checked to see that the exaust valve isn't stuck or checked the valve clearance?? Sounds like a open, or burned, or dirty exaust valve. ( Not enough compression to fire fuel and raw fuel in exaust ) I think I would look at this first before any fuel pump work.
Chris

 

[Kevin_G]

I fiddled with tractor again today. Engine running and sprayed small amounts of WD-40 in intake.
Engine increased in RPM and white smoke literally stopped.
After WD-40 burns off, white smoke reappears and RPM decreased. If it could be the injector pump,(since I swapped injectors and problem stayed with back cylinder), does anybody know where I can get a rebuild kit for the injector pump? Or could it be some other problem still since I'm pretty much force feeding fuel to this cylinder?
Both injectors seem to be delivering the same amount of fuel when pulled out of head, laid on side and engine turned over with starter. /forums/images/graemlins/confused.gif

 

[captain71c]

You would need test equipment to acually measure the amount of fuel comming out of each injector for any type of compairison. Your local auto parts store might know of a rebuilder in your area for the pump. I looked in some of my manuals and they stated that white smoke is commonly caused by a bad or out of time injector pump.

 

[ducksjunk]

You've already said that the compression was good, and if the injector was bad the problem should have moved from one cylinder to the other when you did injector swap. Try spraying your wd 40 around the area where the intake manifold meets the head to be sure you don't have a gasket leak.
R.