chitown21y

iTrader: (6)

So I just moved to Seattle from Chicago and my car now is pinging at wot with 92 octane fuel in 1st gear only I think. Tried different stations and all. Is not tuned and has a stock computer. Never heard of this so curious what you guys think it could be?

Thanks Dave...

itsslow98

iTrader: (18)

Why are you running TR6 plugs? Might not be the problem but I would go back to TR55s.

JJSimon904

iTrader: (8)

That probably is not the problem, but yeah you should be running TR55 not TR6.

Gary Wells

Bad fuel / gas.
water / condensation in fuel / gas.
Try a can or two of "Heet" and / or a couple of gals of 100 octane.

STAGEUP

Check your fuel pressure, and clean your maf with maf cleaner. And nothing wrong with running TR6 plugs. Just leave them.

wcryan

iTrader: (2)

100 octane will throw a code, but it'll go off after a half a tank of gas or so after you run through it

Gary Wells

Unleaded shouldn't. I'm not saying race gas here. Unleaded 100 octane does not throw a code.

wcryan

iTrader: (2)

100 octane unleaded race gas did it for me. Twice. But who knows. haha

Gary Wells

I ran 100-104 octane unleaded in my '09 CTS-V straight for about 4 months. Never threw a code.

wcryan

iTrader: (2)

Looks like I need to upgrade

Gary Wells

Are you sure that was not leaded race gas? Leaded will set off a code, plug your cats, & screw with your NO2 sensor. However, the sensor itself will generally go about 1/2 to a full race season, and the cats will last longer than that before they plug.
Was that out of a can or directly out of a pump?

wcryan

iTrader: (2)

made 100% sure it was not leaded. The only leaded was 110Octane on pump and I bought a 50 gallon drum of 100 unleaded race gas. 100 is usually good to put in just about anything from your lawn mower to your car

Gary Wells

I dunno. I knew that they can sell 100 octane unleaded out of a pump in Kali, didn't know that they can go 110 though. And actual race gas is always leaded, has to be sold out of a can in Kali. Were you able to get up to our Cad V show on 04-09-2011 at Cars & Coffee in Irvine. Had 23 cars there, all V's excepting for 1 XLR or whatever they are.

wcryan

iTrader: (2)

No I had work : /.

chitown21y

iTrader: (6)

Ok so 4 different types of gas and a clean maf later with no change. It does it at wot right when it comes into the power in 1st 2nd and 3rd great from what I can hear?

-T-

iTrader: (2)

friends mustang was running crazy lean due to his injectors... can you check fuel rail pressure?

STAGEUP

Pull the 10 amp ecm fuse for 5 min. Then re install it. Take for a 20 min drive without going wot. After u complete the 20 min drive, try going wot. What u are doing here is doing a reset of your fuel trims

STAGEUP

Also, don't forget to check fuel pressure.

chitown21y

iTrader: (6)

How should I check it just at idle then hit the gas and watch what it goes up to? And what should it be?

-T-

iTrader: (2)

Ok. Here is some arm chair quarterback troubleshooting, fuel psi should be ~60 if I'm correct. If you have 60 at idle, don't stop there, you could have a fuel flow issue causing you to lean out at upper rpm's where higher flow is required with the same pressure. Your pump could have flow issues and still be able to supply the 60 psi at idle because of the low fuel demand if that makes sense to you. Try revving in neutral while checking fuel pressure, might not be enough though and will have to induce a load.

You could disconnect your fuel lines, add some excess hose, drop it in a bucket and see what she flows per minute.