decel valve [was: Re: 5kt ECU]

[Ken Keith]

I don't know if it is compatible enough, but it seems like if you 
hooked up a bypass valve parallel with the airbox, it could act like a 
deceleration valve.  Does a closed throttle body mean the same 
thing as deceleration to a factory decel valve?  Maybe it wouldn't be 
quick enough or something.

My understanding of the decel valve is that it opens when you are 
off-throttle so that the metering plate can fall and cut off the fuel 
being supplied and allowing the engine to brake (maybe more than 
it would it if was getting fuel?).

Can there ever be a situation where this would be bad, like if you 
have high boost and let off the throttle.  Isn't a lean situation 
something you want to avoid?  Why isn't a decel valve dangerous in 
this respect, anyone know?

My 4kstq project donor is also an automatic.  So far, I've collected 
a new clutch kit and still need the flywheel and tie rod (mod).

Thanks,

Ken

On 27 Feb 2001, at 0:44, Ameer Antar wrote:

> I think they're about the same, but the auto ECU doesn't have the pin
> out for the decel. valve I think. The decel valve prevents rich
> running after letting go of the throttle. There might be a way to get
> around it. Check the SJM website for ECU pinouts.  Also search for
> 5ktq links and material in audifans. good luck.
> 
> -ameer
> 
> At 09:05 PM 2/26/2001 , you wrote:
> >Is the ECU from an automatic 5kt the same as from a manual 5kt?  The
> >donor car I'm looking at for my 4ktq conversion is an automatic, so I
> >want to make sure it will work.  Thanks!
> >
> >Aaron
> >'86 4kq
> 
>