Whenever I start my 1995 f350 up when it’s cold it sounds different l noticed that there is a butterfly under my turbo that’s closes and as l was driving it it kept closes and opens until it warmed up, is this Normal
yes. not sure if a 6.7 does that but our older stuff does.
if you dont use a block heater for below 50, it will sound like its choking, rev up rpm, and just sounds like its dying depending on how cold it is.
You can disable it (if you wish) by disconnecting the 2-wire weatherpack-type connector at the base of the turbo on the driver's side. That disconnects the solenoid that actuates the hydraulically-operated EBPV butterfly. I have always found the EBPV to be more annoying than useful for warmup. Cheers!
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