Has anyone else noticed a lot of turbo lag, sometimes it takes a lot of pedal to get the truck to move then other times it snaps out like a new truck should. IDK
Fueling is limited when cold for one reason... the pistons need time to warm up gently under load. Hammering the throttle will blast the pistons with excessive heat causing areas with not a lot of metal to expand too rapidly from the heat, while the piston boss area, where the pin is, has a lot of mass of metal to heat up. This variance in amount of material and heating it up quickly with heavy throttle applications, over time, will cause the pistons to crack, due to different thermal expansion characteristics. This was common knowledge on the early diesel MB Sprinter engines being driven too aggressively on a cold motor, by delivery outfits like Fed Ex and UPS drivers in very cold climates, the engines were failing with cracked pistons. Logs showed abusive driving practices on a cold motor.for the diesel newbies:
1) I hope most of you know by now that in diesel engines the pedal controls fuel being injected, where as in gasoline engines pedal controls air coming in.
2) what contributes to "turbo lag" is the famous diesel smoke limitations plus EGR that oem apply due to emission standards. when engine is cold or you exhaust temperatures are cold you apply a lot of fuel but a lot of fuel means a lot of smoke so in order to reduce smoke EGR and other things are incorporated. One companies start to actually tune this engines properly there shouleed td be no more lag