i have 2005 fx4 and just recently i noticed that i have smoke comming out of my tailpipe. it only happens if my truck is sitting for a long peroid of time (24hours or so), and then i start it. its summer in michigan i didnt think this should be happening. is this normal after your truck sits for a peroid of time? it goes away after i drive it for a few minutes.

 

Mine does the same thing and it goes away within a few seconds. Ford said that it's normal.

 

thas not smoke. its steam. as the truck first starts warming condensation buils in the exaust and is quickly evaporated from the rising heat.

 

Nope. It was a puff of black smoke. It only does it when it sits for a while or when it runs for very short periods of time (in and out of the garage).

 

There has also been a few threads here about leaking fuel injectors. Do a search for them.

 

This is an indication of a major problem. If left unchecked this could result in bent connecting rods and ring lands. Should be under warrenty still take it in and let your dealership check it out!

 

@ WOT white smoke exiting the tailpipe could mean what. @ Pismo (Sand) while I was WOT I would have a good amount of white smoke behind my truck. I also found a peice of insulation by the headers that looked like it might be getting burnt (was fringed, etc). Anyways, hopefully that was all it was. I have pics of the smoke if needed.

 

Black smoke indicates fuel, white steam(H20), blue oil....

 

my truck also does it very lightly at start up, itss done it before and I believe was fixed by getting the computer reprogrammed. anyhow im going tomorrow for oil change and all that stuff and also getting that checked again. Ill let u know

 

Josiah.... Awesome Video!!! I never saw any smoke just a lot of mud and a BAD A$$ truck... Your truck really does go off-roading. Nice touch pulling that BIG CHEVY backwards through the wash. How deep was that mud pond? Did any others go through it? and make it? I really enjoyed the video I watched it twice.

I was told by FORD on my older truck that smoked when started, it was worn valve stem seals, that truck had almost 90K miles on it though. BoB

 

Thanks a lot. The chevy I ended up pulling (snapped the ujoints on the axle end) out went through that hole, they struggled a little but so did I. Another stepside 70's chevy on 39.5" boggers locked in the rear made it as well, he actually didn't do very well but there was an even bigger mudhole to the left he went through, to enter that pit it's a sharp dropoff so I didn't want to take a chance having to get pulled out on that end especially if my motor was to take on water, they'd have to pull me out dead weight. Thanks for the comments again.

Blue oil as in needs to be changed?

 

I have seen it a few times myself out of my truck but goes away once the truck is up to operating temp.

 

No, he was using shorthand. Light blue smoke normally means you're burning oil. IMO, even brief puffs of black smoke at startup are really bad. It means that your fuel injectors are likely leaking. If you fill a cylinder with gasoline and try and start the engine, you're screwed. Unlike air, gas isn't compressible. If you try and compress gasoline, you can basically destroy the engine.

Grim

 

My dad had an old F150 with a 351 that he ran on propane for around 50k. It caused major damage valve stem seals. It spit out huge amounts of blue smoke every time it was started up!

Grim

 

no, blue as in oil getting into the combustion chamber probably by seeping past the rings. premature catalytic converter failure can be attributed to "burning oil" and constant oil consumption. pay attention to the oil levels in your engine to determine if you motor is using oil. ultimately an engine that burns oil will need to have the piston rings replaced.

White smoke could primarly be two different things. condensation that accumulates in the exhaust system during periods of inactivity should dissipate shortly after startup. heavy, persistant white smoke indicates that coolant is entering the combustion chamber probably due to a faulting head gasket. this would require a head gasket replacement to prevent engine seizure.

ox