1hdt fluctuating idle (1 Viewer)

[kenbilt]

hi ya . problem 1hdt fluctuating idle can see the vacuum canister shaft pushing idle up after 30 or so seconds returns to normal an so on an so on has no acsd fitted any ideas?? is th problem th eletric switch that controls th vacuum to th canister from the vacuum pump thanks guys

 

[mudgudgeon]

If you disconnect the vacuum idle up, does idle change?

The 1HD-T are known to sometimes have a fluctuating idle due to IP wear.

Search the diesel tech section, there'll be discussion about it for sure