After the megasquirt install, and my success with it, I decided i didn't need to keep all the Djet stuff. Now, I wish I would have kept the decel valve and here is why.

I thought, well the megasquirt has a decel cut function built in, that will help lean out the mixture on decel, and thats what this valve did anyway. Wrong. The decel valve I have since discovered makes shifting easier. Why you ask? Cause it allows air in once the throttle plate closes. This allows the engine to return to idle in a much slower fashion, thus not making the syncros in the tranny to work so hard. I figured this out cause my tranny will speed shift fine, but if I take my time, which I normally do, its much harder to get in gear.

So does this mean you want one?

If you are having problems shifting, I don't think it is a result of a missing deaccel valve.

I think it is a contributing factor to the shifting. It's not bad now with all new bushings and trans mounts. What i'd really like to know is if someone has one on there car thats adjusted correctly to disconnect it and see if there is a big difference on decel time. I might be buying one.

When i had the 1.7L, one of the first this to go was the decel valve. I really like the much better throttle response without the valve.

Without it, you can actually use the motor to slow the car down ...
Andy

PS: Never noticed any difference in shifting quality.

Don't feel bad. Unofficially, I've been an idiot for several years.