A930Rocket

First of all, I know where it is. LOL

My problem is that I've set my timing and and I can't get my idle below 1150 rpms when warmed up. The idle adj screw is all the way in. Is that a problem long term?

AmI looking at the WUR now?

TIA.

Jim

ayglass

Vacuum leak? Idle air valve? (if there's such a thing on the CIS 930). It may sound crazy, but cut a small "window" in a paper plate and put it on top of the CIS unit where the air goes down past the paddle. If the car pulls the "window" open at idle the the air is going past the plate, if not there's another source of air. We used to adjust carb balance (crudely) with a properly sized window and some luck....

A930Rocket

I emailed Steve Weiner and I think it might be the dizzy. I think the mech advance plate (weights) is messed up (I must have screwed it up when cleaning it).

ayglass

I learn a lot when I clean things... at least when I repair them I learn ;-)

sand_man

I got your message Rocket. I'm not sure when you called, but that's my office number. I emailed you back this morning. Of course you can borrow my dizzy. It'll be a stretch to get it out today, but I'll see what I can do.

As for the idle, yes it is possible to "re-index" the idle slightly by changing the control pressures on your WUR and then making corresponding adjustments to the air/fuel metering plate screw and then finally the idle screw. However as I have discovered, there is a certain balance that needs to be achieved between the WUR and the air/fuel metering housing and AFRs. I'm not sure you want to start fiddling with this yet...if the dizzy is suspect.

A930Rocket

LOL. The dizzy can be a starting point, but with all the changes.....

I'll start with the dizzy and then move to the WUR.

Jim

RarlyL8

My engine does the exact same thing. Idle will not drop below about 1050rpm. I chalked it up to removing all the CIS stuff, most of which affects the idle.
Please post your results and conclusions.

sand_man

Rocket, PM sent.