Decel valve springs: replaceable?

[Bitsyncmaster]

In keeping with the original subject matter, I wanted to show you all what my springs look like. I took my throttle body off in advance of receiving some good butterflies from Josh @ DPI and this is what I found:

Attachment 39522

So far, all the good ones I have seen have the springs evenly spaced and all the bad ones look like yours.

[Morpheus]

Update:

Here's a side by side of my old butterflies and new:

IMG_0452.jpgIMG_0464.jpg

I'm happy to report that my car now idles as it should. Thanks to Josh @ DPI for getting me the parts I needed to make this happen!

[David T]

Update:

Here's a side by side of my old butterflies and new:

IMG_0452.jpgIMG_0464.jpg

I'm happy to report that my car now idles as it should. Thanks to Josh @ DPI for getting me the parts I needed to make this happen!

Those valves are only important on the 5-speeds. For automatics they can be sealed shut. On one car I worked on that had a custom exhaust we experimented with different springs to modify the exhaust note on decel. It did make a difference. I found the springs inside ball point pens to be a close fit with some modification. I think the cars that had problems with leaking decel valves must have had earlier problems with backfires and the heat damaged the springs. Once the springs got hot they lost their tension and could not hold the valves shut tightly. Leaky decel valves have the effect of bypassing the idle motor and increasing the idle speed.

[Delorean Industries]

Huh David?

[Bitsyncmaster]

I found the springs inside ball point pens to be a close fit with some modification.

?

[David T]

During the experimentation we tried cutting and stretching the original springs and eventually ruined them. In desperation we tried other springs and the small spring in a retractable ball point pen are close enough in size that we were able to use them in place of the originals. I did shorten them so they would fit. We did not have a set of replacement springs on hand so we improvised.