more power when cold

[captmatthew1]

over the last little while, i have noticed my truck has a lot more get up and go than when it is warm.

when cold the thing rolls a bit more coal, and pushes me into the seat, but when warm it slightly hazes and gives me a mediocre push.

anyone else experience this? what should i look for?

[dazedandconfused]

Cooler denser air will always produce more power. I would still check the intercooler and all boots though.

[captmatthew1]

its a huge difference. more than i think the cold air would make. i will check the boots, since i think they were starting to crack. any other suggestions?

[RCCUMMINS89]

Your h/r might be seeing some wear (same symptoms as a lower idle when warm)..... do you experience this?

Also, your timing si being advanced when cold (assuming your ksb is doing it's job)...... to test this advance your timing about 1/4" and see if you regain your cold engine power.

[captmatthew1]

idle stays the same when warm. i had my timing advanced but moved it back a while ago from 1/8. i will bump it 1/4 and see how it does.

[Remps]

How clean is the IC? The dirtier they are, the quicker they get heatsoaked. I use powder sunlight laundry soap, dump a bunch on the back of the ic, and pressure wash it through. This will require removal of course..it will come way cleaner with the soap, gets the bug slime out.

[RCCUMMINS89]

Wouldn't explain moving more fuel when cold (more smoke). Timing would, because one can lay more "coal" with more timing, at low rpm, until the turbo spools.

[cougar]

It is like tuning for one altitude, then moving to another. Up here in AK, we have some pretty extreme density altitude changes. The effects can be dramatic.