Howdy!

Hoping you guys can give me some direction!

I have a 2002 Excursion 7.3l. Love the X

I didn't drive her for 2 weeks while I was away (obviously). Started her up a few days ago everything seemed fine. Took off, and I noticed right away when I made a turn onto the main street and gave her a little gas, I saw a lot of black smoke coming out the pipe. I figured hell 2 weeks sitting, she's "cleaning out".

While driving to work, overtime I WOT she would shoot out more black smoke. No biggie I figured, just need to keep giving her time to run again. After work, I gave her a spin on the parkway and really gave it to her Cruised for about 30 minutes, every now and then WOT. I saw some black smoke but it was getting better.

Each day I drove her, and gave her hard accelerations, the smoke got better. Now I'm down to what seems a small amount of black smoke (a puff if you will).

I'm almost sure she never did that before, but then again, I didn't look at my mirror everytime I WOT.

Is this normal? do the 7.3's puff a little black smoke on hard accelerations?

Truck feels fine to me as far as power goes and she does move. I did just replace the air filter and fuel filter thinking maybe it was a fuel or air restriction, but doesn't seem to make a difference.

Looking forward to hearing from you guys!

Thanks

 

What kind of mods have you done?

Moving this over to the 7.3L forum.

Stewart

 

Truck is bone stock dry. Thanks for the response.

 

My stock 02' 7.3 barely gives any noticeable smoke at all. There has to be a car behind me at night and if I stand on it I might see a tiny puff in his headlights. During the day I can't see anything really.

 

You said it was sitting for 2 weeks. Check your air filter. Make sure something didn't decide that your intake air box would be a good place to make a nest. If your engine can't get enough air it won't be able to burn all the fuel that's injected and the unburnt fuel will come out as black smoke.

 

Thanks for the responses so far!

I did check out my air box, and it was clean in there and I replaced the air filter already.

Where i Live, critters making homes in engine compartments isn't a "normal" thing

Keep the ideas coming guys

 

Boost/exhaust leaks are a common cause of this, and a bad ICP sensor under the right circumstances can do it.


Is there any soot anywhere under the hood? It doesn't belong there.