Hey Guys,
I just got my IROC running last week, but I had a runner intake leak which I had to fix. I did get the engine broke in before I fixed the intake leak. I fired it up today, and I noticed that number 7 header is glowing red hot. And number 5 header is faintly glowing. Could I have connected the injectors wrong like crossed them since they are not labeled.

 

Nope, doesnt matter where you hook them up.
Checked those spark plug wires, see if they are crossed?

 

Its unlikely. The TPI system uses batch fire for the cylinders. Which means that all 4 injectors on a single bank fire at the same time.

Unburnt fuel could be causing it as well if its burning in the primaries. As mad max said check the spark plug wires, and plugs themselves.

 

I say something is wrong with your timing possibly

 

Also check for exhaust leaks especially near those cylinders, or the left side (driver) Y-pipe flange.

 

 

Great thanks for the info!
I'll do all that, plus a parts store by my house is selling Accel Header plugs. They are shorter for more clearence, so I thought I'd pick those up and try them.

 

Oh as for my base timing, its at 16º and my cam is a Comp. cam with the following stats: model no#08-306-8 , duration at .05 230/244 , 1.6:1 lift .544/.576 , lob sep. 112deg.

 

your timing should be @ 6 BTDC with ESC wire disconnected (tan / black stripe) located at the passenger side near the AC blower

 

Ok?
how can that be if stock small blocks are set at 10 degrees advance, I don't think my engine would even run with the high lift it has in the cam. Just to confirm my setting I'm using the timing tab of the block at 16 degrees to the crank balancer at the zero mark. I'm Using a adjustable timing light. I'm lining up the crank balancer zero mark to the 16 degree engine timing tab. This is of course is with disconnecting the distributor/set timing brown wire.

 

Way too much initial advance. Set it at 6 or 8.

 

I have mine at 6d's in my 406

 

Ok!
as a example should I set the base timing using the crank damper zero mark and set it to the timing tab at 6 0r 8 advance ?

 

Yes. Or since you have an adjustable timing light, you can put that at 6 and have the mark at zero on the tab.

 

Thanks!!
I'm guessing that should also solve my glowing headers problem.

 

It may. The computer is going to advance the timing around 15-20 degrees at idle so with a 16 base it was way too high. Might fix it, you'll know soon enough.

 

Well dropped the base timing down to 6 degrees, as the engine was warming up the headers again began to glow 5 and 7 with 7 being the worst. I also went with Autolite plugs # 3923 and gapped them at 45 thousands.

 

I noticed when its running you can hear a ticking sound on the drivers side. So I pulled the valve cover off, and found number 7 intake is loose, but 7 exhaust is not when I set the engine at number #1 TDC.

 

Did the ticking stop when you ajusted #7

 

Yes the ticking stopped, and the header number 7 only faintly glows at base timing 6 degrees. Once I reconnected the ecm and it started to learn, that to seems to have gone away. I'm assuming at 6 degrees it was too retarded and was heating up. Then once the ecm kicked in it advanced the timing and the glowing header seemed to have stopped.

 

Just an update, my last post seems correct! So I'm back to dialing in.
Thanks everyone for your input!!!

 

Ecm does not learn spark.