valve leading to downpipe trouble?

[adam95]

the butterfly valve going to the downpipe keeps closing on me while im driving even at over 2500 rpms it just started to do this when the temperature dropped in upstate newyork to about 20 degrees. any remedies for this problem would be much appreciated thanks guys

[pipelayerjdh]

It's called the Exhaust Backpressure Valve. It activates at cold temps to warm the engine. The easiest fix is to disconnect the two-wire plug going to it. The plug is on the driver-side under the compressor housing. You may have to remove the intake hose to get to it. You can also gut the valve.

[adam95]

thanks pipelayer i appreciate the advice, im gonna go disconnect that wire now.

[pipelayerjdh]

Are you plugging your truck in at night?

[adam95]

i havnt been pluggin git in yet. I heard 20 degrees is the general temp rule for diesels?

[pipelayerjdh]

See how it does. If it takes too long to warm up, you may want to plug it in.

[adam95]

thanks for the info pipe layer i appreciate it brother.

[bear36]

Originally Posted by adam95

thanks for the info pipe layer i appreciate it brother.

I may have the same problem, does the make a sucking sound when the valve closes. Mine also looses rpm when this happens but as soon as the truck is warm it disappears.

[pipelayerjdh]

When the valve closes, it will make the engine feel sluggish and make a hissing sound. The sound is louder with intake and exhaust mods.