Real Bad Turbo lag ?

[BDSford03]

My buddy just bought a 04 f350 with 56000 miles. It is all stock besides a Magnaflow turbo back exhaust. NO tune or anything yet. I dont know if it is just me or if there is something wrong. In my opinion it feels like a very long delay for the turbo to spool and make power. it could just be me and my lack of driving with no tune but it seems slower then i remember.

Any ideas of what could cause excessive turbo lag?

also, its not blowing any smoke white or black.

thanks

[Big Angry Hillbilly]

turbo sticking perhaps?

[panheadjay]

what about a restricted air filter,or wast gate not working properly?

[BDSford03]

would it be worth it to get a new flash? and see if that helps.

[elibenson]

It wouldn't hurt to get the latest calibration, but I think your problem has to do with your turbo being sooted-up. You may have to pull it off, and clean it.

BTW, Panhead Jay, the 6.0l doesn't have a waste gate, it has a variable geometry turbo. It has a bunch of moving parts that direct the exhaust gasses to run the turbine more effectively. They get rusty and sooted-up and don't work really well.

[metstroke06]

Sounds like the vanes are sticking. Remove it and clean it. Everything you need is online. Don't forget to add anti-seize to the unison ring and the bearing housing side of the turbo. Buy some carburator tune-up cleaner, something sensitive for the vgt actuator and give that a good spray down. Careful to not damage any of the parts. Buy the hardware kit and replace the 0-rings and oil feed line gasket as necessary. It's really not a difficult job. The only tool that saves me the most time was a 7/16th ratchet wrench for the v-clamps on the exhaust housing. Make sure the exhaust uppipe is seated properly before clamping the pipe when you reinstall it.

[BDSford03]

thanks for the info. I will let my buddy know we need to clean his turbo. Is this common for a truck wiht 56xxx miles on it?

[metstroke06]

Yes perfectly normal for 56k.