Thanks to everyone who gave me some advice with my last post about not getting my Firbird to idle.

Like I said in the previous post, the car will now hold any idle I want, but the scanner is screaming lean and my plugs & cat are crying rich. First I must state, the last advice I got was to correct the timing, change plugs, and get a new PROM. The timing was corrected and that helped; I do not want to change plugs becasue I bet they'd get fouled much the ones I already have in it-I plan on a plug change when I get this issue figured out. They also are not so fouled that the torch did not clean them off. The chip swap is addressed below.

My tests and results since I last posted:
-car holds chunky "top fuel" idle at 1000 RPM
-I could NOT tune the scanner-lean out of it with timing
--> with EST disconnected, I got lots of pops into my plenum at 8*, these went away with more timing
-scanner still will not move off of "Lean"
-my O2 mV do not go above .400 at idle or with throttle applied (stay .300-.400)
-bench tested the O2 sensor, in the flame I got .88+, remove flame went immediately to <.1 and back and forth, 2-minute drill showed occasional .2 -.3 voltage decrease-but immediately went back into the upper .8's....sensor ok
-cat (2 cats-passenger side only) still turns orange, quicker with more timing added
-checked pins at ECM harness, all appeared to be making a connection
-SES bounce test was ok
-disconnected MAF: car would start, hold 2k idle for a couple seconds, rev to 3k and then die
-after O2 bench test and MAF reconnected, car would still show scanner-lean, mV still did not exceed 400, but I got 68 crosscounts under throttle
-at idle, IAC shows 45 steps
-complete plug check showed all but plug #5 were black, and smelled like gas and had oil on the threads (no external oil leaks seen); plug 5 was tan in color w/ no smell; plug 8 was black but the top of the electrode was white with a minimal gas smell
-obviously, car never went into closed loop

I have talked to my chip tuner, and freind who is a mechanic. I was advised to call Summit or Venom and see if maybe I have too big an injector for this application. What do you all think..30lb too big for port-matched and ported intake 52mm TB car? (mods in sig)

I am beginning to think that my scanner-lean is really a false lean due to my injectors saturating my O2 sensor. Would anyone agree? After I talk with Venom, I may step down a few pounds to a smaller injector and have my chip then reflashed to reflect this.

If anyone would please weigh in on my injector and O2 sensor theories, I would most appreciate it.

Eric

 

I got some slack from one of my advice guys as it related to my injector choice/cylinder head combo. So I wanna post some specs in case they would help in gettting me a rock-solid solution.

Dart Iron Eagle SS 165's
72 cc comb chamb
165 cc intake runner
210 cfm intake flow
1.94 int val, 1.50 exh valve

 

The final Jepoardy answer was that my brand new AS&M runners were warped .030 on all four flanges. I got them machined flat and the car runs great now. Good luck if you have this product!