Losing Power Again

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This time i've got a massive air leak on a contraption that's mounted jsut below the starter on a Volvo d12.
One electrical connector and two air lines are attached to this unit.
A lot of air pouring out of this device on engine shut down.
engine break still works.

TA guys did'nt know for sure what it was...


Started about 3 hours ago after fueling.

1st would maintain speed on small hills.
then woud'nt climb strongly on flats with only 20k in the box.

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Volvo dealer over phone said it's most likely the Eexhaust Pressure Governor that's leaking air.
it had an exhaust port, but i'm not sure what it means that its exhausting so much air at engine shutdown.

it blows for about 3 minutes solid

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[ame]http://www.amazon.com/Volvo-Exhaust-Pressure-Governor-21369922/dp/B0028FTLC8[/ame]

yep, confirmed with this photo


the leak is coming from the round device that looks like it has a gasket/seal around it-

if air is leaking here.... ????? cue the dread music

[blanco]

Wow..over 500 smackers

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total with labor was 891

And....it fails after two days. Reloaded at coke in warrneton, mo headed for denver.

77k lbs, and leaving colby, ks this morning, the infamous check engine comes on.

EPG1 electrical fault

mid 128 ppid 124 fmi 5

oh the joy.

Lost the volvo engine break - or it's derated.

back into the shop.