Hmm, I hate to keep throwing $ at this: I feel I need more testing.

BTW: is there a default setting to the ECU's potentiometer? My car is still running very rich, even with all the new parts. (verifying Fuel pressure tonight).

Mark

if you mean the knob on top of the ECU, that is only for idle mixture, doesn't affect the rest of the range.

Oh excellent. Ok. Well, My fuel pressure is sitting at 32psi in lieu of about 29, so once I have an OEM injector back in the saddle, I'll leave it there.

BTW: I'm running so rich that the car starts & runs perfectly w/o the cold start valve connected...eek.

Mark

The cold start valve only works at freezing or below, not likely this time of year in Austin. That may be an indication that things are working well as they should.

you mentioned idling at 1800 rpm, that could be the Aux Air Regulator allowing extra air for higher cold idle speeds. That should stop after a few min. They tend to stick, or leak air that causes high idle. I have mine blocked off because of that. you might pull off a hose and block it to see if it makes a difference in the idle speed while warm.

You could also pull the throttle body plug completely to see how it runs when not on the idle circuit, which is switched in by the throttle body when the throttle is closed. That is when the ECU "potentiometer" comes into play.

Well, the idle is now between 1800-1400, but consistent throught the time the engine is running. I have 4 AAR vavles (3 from the local salvage yard) to test, so I can put another in there, see what that does. :)

Is there a write-up on testing the TPS switch on the TB anywhere? My manuals appeared vague in that area.

Thanks again, Mark

pretty much everything about DJET is here. We are all indebted to Pat for this page... Thank you Pat!

http://members.rennlist.com/pbanders/DJetParts.htm

Ha, surprise: as of lunch today, I confirmed that my "new" Autozone injector is not firing. I have a weak cylinder somewhere too, so currently, I'm running on 2-3 cylinders depending on the wind direction. :)

On the weak cylinder, if I unplug the injector, the idle rises for a 1/2 second, then falls again. when I reconnect it, the idle does the the same thing: rises for 1/2 second, then falls. Wierd. Usually, there's a definitive & continuous fall of rpm followed by off-cylinder vibration when you unplug one injector.

For now, I just unplugged the Autozone injected cylinder, I might do the same on the so/so cylinder: wonder if I can make it home on 2 cylinders??

I have a very steep 200' hill to scale on my way home today: this is gonna be interesting!!

TPS-http://www.pelicanparts.com/techarticles/914_cooley/914_cooley_throttle_switch.htm