Cold running

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Dec 11, 2007 | 06:17 AM

jle70

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From: Sullivan, IL USA

Cold running

When accelarating with cold engine, I hear what sound likes a "mass air flow". After the engine warms up it goes away.

Dec 11, 2007 | 06:36 AM

Flea

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From: KC, MO

Probably EBPV!

Dec 11, 2007 | 06:52 PM

jle70

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From: Sullivan, IL USA

Is that a bad thing???? What is the purpose of the exhaust valve??? Does it hurt anything to hear this sound and still drive??

Dec 11, 2007 | 07:16 PM

Flea

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From: KC, MO

No. most guys complain that it wastes fuel. It is supposed to help your truck warm up in the winter but some guys have reported no change after unplugging it.
It sounds like a air compressor letting the air go.
If you accelerate it will open back up.
Some say that the EBPV gets cloged, but I don't know what they are referring to.

Dec 11, 2007 | 07:36 PM

jle70

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From: Sullivan, IL USA

So it just forces exhaust heat to engine, to warm it?

Dec 11, 2007 | 07:47 PM

Flea

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From: KC, MO

yep it is just like an exhaust brake and you can convert it to do that.

Dec 12, 2007 | 08:49 AM

tjbeggs

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From: Silver Lake Dunes, MI

It restricts the exhuast flow to put a load on the engine to help it warm up faster, problem is that it doesn't work well and malfunctions frenquently!