Idle problems after engine modifications –> HELP

I am having problems with idle on my 1990 5.0L Bronco. This is basically stock with heathers and I already had a Mass-Air conversion on it. The truck ran fine and idled OK before I messed with it.

After installing GT40 heads, GT40 intake and new cam on my engine, I just do not have idle control and my engine is running real hot. It is idling like it is missing a few beets.

Fiddling with the connectors and reving the engine up and down, I noticed that my forward cat was glowing red hot? The headers at the connection to the Y pipe were also glowing red hot.

I double checked my timing and all is OK. Here are the specs on my cam

Valve Lift Duration Camlift Duration Lobe Separtion
Intake 0.464 264 0.29 202 114 112
Exhaust 0.4646 264 0.29 202

There are 2 things that I suspect and need your help and input on:

1. Bad O2 sensor. It may have been ruined from the assembly lube that I used around the valve train? I pulled the plugs after running (they were new prior) and they had black carbon on them.

2. Fault in the electronics of the distributor. When the shop was pressing in a new gear, the guy dropped the distributor, breaking off the plastic piece on to. The connector is OK and I did not see anything loose or damaged inside.

Hooking up my scanner, I am not able to test because it does not get past the idle test. Stating that it cannot control idle.

Any input on what I may have done wrong?

Thank you in advance,
George
gvolosh1@san.rr.com

 

Check the IAC valve, may need cleaning.
Also, on my '90, the truck would not run past the idle test either until I replaced the MAP sensor and O2 sensor.
When you changed to MAF did you also change the ECU. If not that is the problem, the computer still thinks it's running a speed density system.
The glowing exhaust tells me it's runin' rich, check the fuel pressure OR a plugged cat converter will also make it run bad and make the pipes hot.
Hope this helps!