I used msd coil and distributor cap. New autolite platnium spark plugs and borg warner spark plug wires.

Why am I getting worse gas mileage on my tbi camaro?

Having any other issues? weird idle, loss of power etc?

No just the engine stays really hot 210-220 the power is ok most of the time depending on the weather it gets 80 here and at night 40s. Idle is fine

That a normal temp for your engine?

I would make sure your plug gap is correct. Also make sure you don't have wires mixed up.

The gap I used was the one under the hood and yes my engine always runs about that until the fan brings it down a bit. My wires are ok it sounds smooth.

you're not suppose to gap platnium plugs...

Yeah whatever. Gap them carefully. Hey say you shouldn't but be careful. Never had a set be correctly gapped. Always one off. Drive it more. Use different gas and let us know what happens

ditch the platinum plugs they foul too easily for these old engiens to run. If you dont feel a misfire. Then you shouldnt have your wires crossed. that is all you did?

What was your gas milage before and what is it now?

Should of asked that first.

Before it would go a tank a week and now it uses a quarter of a tank to drive 9 miles.

Uh 9 miles for almost 4 gallons of gas?

Thats beyond horrible. I would put regular plugs in it and see if that makes a difference.

did you do the fuel filter? sure its not leaking fuel out of it? because 2.25 MPG isnt bad. its horrific. cannot be right