Strange engine issue

[noahkenny]

My 89 Ranger 2.3 runs great no real problems till lately. Its gotten to where when it gets in a hard pull it will start to diesel or sounds like the valves are floating and when it does that it starts to smoke pretty bad out of the tail pipe. The smoke appears to be white. But when you let up all problems disappear. As long as you drive it normally it doesnt miss a lick. It does burn maybe a quart and a half between oil changes. I just resealed the engine, didnt rebuild it. I did drop the rod and main caps and the bearing looked just fine. Also when I had the intake off there was no oil/carbon build up around any of the valves so hopefully there are no problems with the valve seals.
Im hoping its just an injector causing the issue under load. Any input fellas??

 

[doorgunner]

beats me.......I thought only coolant or automatic transmission fluid would cause white smoke????

blue smoke--oil

black smoke--excess fuel

 

[noahkenny]

Im just as stumped. Your right about all the smoke colors. When Im driving up a hill and I really get on it (which aint much) it starts that mess and its a pretty bad white smoke. I guess it could be a little blue. I was in too much traffic to really be able to pay attention to what was going on behind me. But as soon as you quit pushing it, it stops totally and runs right, not even a hint of smoke. My thinking is that its maybe an injector laying down under a pull but that wouldnt explain the color of the smoke. The last time it happened was two days ago. Been running great since. But I do drive like a little old lady. I just had this engine out because it was leaking oil everywhere. I didnt have the money to rebuild it but based on everything I saw, it didnt need it. Looking up in the intake and exhaust ports in the head while I had the intake off all of the valves were clean. No sign of oil getting by the valve seals. And all the valves were sealing good. I did not take the head off, didnt feel like I needed to but I wish I had at this point. The rod and mains looked good. Oil pressure was great.The injectors are the only thing I could think could be intermitten. Checked the fuel pressure the other day and it was spot on.

 

[Earl43P]

Try a new PCV valve.

If it sticks open, oil will get sucked into the intake and burned.

 

[06RangerXLT]

Try a new PCV valve.

If it sticks open, oil will get sucked into the intake and burned.

thats a good point, increased throttle = increased vaccum which could pull in oil. didnt think about that one.

 

[noahkenny]

Try a new PCV valve.

If it sticks open, oil will get sucked into the intake and burned.

Thanks Earl. Didnt think of that. I will definitly explore that avenue. I did install a new one when I had the engine out but that doesnt mean anything.