1985 Monte Carlo SS known as Barney

[camcojb]

Originally Posted by SSLance

So our friend and fellow board member Andrew spent about 2 hours today dialed into my laptop hooked to the car from his house and really got the idle tune dialed in perfect. It was fun to watch and learn...and see the results from the changes in real time. I'm not sure if it's the cam, the worked over Fastburn heads, or just the whole complete package...but this combo really seems like a great match for the ECU and throttle body. It seemed pretty simple for Andrew to dial it in initially.

We did kind of struggle to get the idle down (which I always fought with the Q-jet as well). Even with throttle blades completely closed and IAC at 0, it still idled around 800 rpm. We even capped off the 3 vacuum lines I had hooked to TBI to see if there was a leak on one of them with little effect. I finally put a wrench on the 4 bolts holding it to manifold and tightened them 1/8-1/4 turn each and that bumped the IAC up to about 4. Backing the idle timing down to 12 degrees and a few other small changes got it to idle about 760 or so with IAC around 4 and we left it there. I need to get the air cleaner back on to see how that affects it if any. The heater hose valve was in the way of it and it was too freaking hot to mess with today.

Speaking of heat, it idled in a 100 degree garage for over an hour and never got over 190 degrees. The low and high speed fans work perfectly exactly how they are programmed in the ECU. No leaks, runs, drips or errors that I can see either.

Time to get the wheels back on, gas tank bolted in, fenders back on and tidy up the loose ends so I can test drive it on the street. I think Andrew was disappointed when we were done with idle tune and he asked me if it was ready to drive on the street.

You gotta watch out for that Andrew guy...