secondary issue

[spork2367]

Pulled my intake for a starter issue and was doing a quick vacuum check and found the passenger side secondaries sticking. Upon further investigation I found this...The bent butterflies don't appear to have caused the sticking issue, as it was still sticking after their removal. What else would cause this?

[Ccmano]

The vacuum actuators certainly don't have enough force for something like that. I wonder if somewhere along the line there was a backfire that caused it. Are they all like that?
H

[Paul Workman]

Originally Posted by Ccmano

The vacuum actuators certainly don't have enough force for something like that. I wonder if somewhere along the line there was a backfire that caused it. Are they all like that?
H

Backfire...was my guess too.

[A26B]

Originally Posted by spork2367

Pulled my intake for a starter issue and was doing a quick vacuum check and found the passenger side secondaries sticking. Upon further investigation I found this...The bent butterflies don't appear to have caused the sticking issue, as it was still sticking after their removal. What else would cause this?

Bent shafts can cause sticking. Did you remove them too?

[Ccmano]

Time to just omit the secondaries altogether. I have a set of butterflies if you need them.
H

[spork2367]

Originally Posted by Paul Workman

Backfire...was my guess too.

That was my only guess, but I find it hard to believe. This was just on the back two cylinders on the passenger side.

Originally Posted by A26B

Bent shafts can cause sticking. Did you remove them too?

After I pulled these two butterflies, everything freed up. I'm going to straighten them and refit them.

[Jagdpanzer]

A real mystery. With the adjacent intake valve being open or closed more or less at the same time hard to imagine that much force being generated that would bend a secondary butterfly like that. Has anyone else every experienced this?


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[Jagdpanzer]

I have a few new take out butterflies for free if you need them.


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[spork2367]

Originally Posted by Jagdpanzer

I have a few new take out butterflies for free if you need them.


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I appreciate that. Let me see how flat I can get these first.

[Paul Workman]

Originally Posted by Ccmano

Time to just omit the secondaries altogether. I have a set of butterflies if you need them.
H

That'd be MY vote too!!