346_chevelle

I'm very new to tuning with hptuners but I have done several swaps in the past. The car I'm having issues with is a notch mustang with a 2000 5.3 that has a .600 lift 23x-24x camshaft. I have tried a couple how-to's on here and on the HP tuners forum but the car always wants to start and run at 2200 rpm then the iac count goes to 0 and it idles around 1400 rpm. I can see it doesn't have enough timing and is real rich. I thought it had a bad vacuum leak but I've tried a couple intakes, gaskets, throttle bodies and it still idles high.
I haven't figured out how to attach the log and the tune.
I have them in my email ready to send to anyone who can possibly help me out.
Thanks

edcmat-l1

iTrader: (10)

If it's idling that high, and the IAC counts are at zero, you are getting air from somewhere. Either a vacuum leak or the throttle blade is open too far. Either way, it's getting too much air. It's not tune related if the IAC is at zero.

Find someone with a smoke machine.

346_chevelle

I'll see what i can come up with tonight. If i cover the throttle body the engine will stall and die.

edcmat-l1

iTrader: (10)

Sounds like the blade is open too far, or the hole in it is too big.

346_chevelle

The two throttle bodies I have tried are the stock 5.3 which has a really small hole and the other is a 6.0, it has a little bigger hole in it. I'll try to close the throttle blade some and see what happens.
Thanks

edcmat-l1

iTrader: (10)

Put a small piece of tape over the hole just to test.

MontecarloDrag

iTrader: (3)

It has a cable throttle body and you can adjust it using the stop screw.
It is inverted and has a torx head but it can be done. Turn it to allow the blade to close a little more and test.
Don't go too far because the blade will begin to stick

346_chevelle

Thanks for all the help! It's greatly appreciated. The problem turned out to be the two "high" wires for the iac got switched during the wiring process. I was able to just switch the pins in the ecm. It fired right up and idles exactly like it should!
Now on to tuning the rest of it.