So I've been wanting to get better cold starts and without idle control its a bit of a compromise. I never had a major issue with getting it started, but cold idle was a bit low until the engine warmed up a bit and i wanted to improve it.
I have always wanted to add an ISV so after i figured out the best way to install it, i bought some fittings and started to install it.
Had to bypass the throttle plate and keep the system sealed. I didnt want to do anymore welding, so I bought a 13mm take off to fit into the elbow before the throttle.
Then a section of pipe was made up consisting of a 19mm-13mm reducer, joined to a section of 13mm silicone. This was used to connect to the ISV input.
A section of pipe was made up for the ISV outlet to manifold connection. I chose to Tee into the manifold where brake servo connects. For the permanant connections i wanted to keep it neat so i used ear hose clamps instead of worm drive
ISV connection Tee'd into servo line.
ISV connected into circuit, to bypass throttle
Once car was fired up, i had to adjust down throttle stop as the extra air from the ISV had it revving near 2k rpm once warm.
I have it setup for warmup mode only and it works well. I have noticed there isn't much range to adjust on the valve. It revs very high within a 10% duty band. I Will attempt to get closed loop idle working at a later date.
