Thread: LTFT readings

Can anyone give me some good ranges my LTFT reading should be at?

I'm stock except having a short ram with a open cone filter. Running 93 oct gas.

213k miles

Have a bit of a stumble just cruising around you can't really see it in the RPM gauge but you can feel the car surging? When it happens.
Random CEL for a evap but I have a gas leak when I fill up so I know that issue.

I have replaced the vacuum lines and T.

MY LTFT was around -14 around 2k RPM 45mph
I have hit -22 LTFT under boost. I never go into the + side of the LTFT readings.

I'm new at this so if you need more info let me know.

So what should I start looking at?

Thanks for your info.

youre running really rich. in the negatives means the car is trying to pull fuel and right now its maxing out what it is allowed to pull.

something is wrong.

No CEL lights but a random for EVAP which is from my gas tank. If i fill it max it leaks.

im suprised you haven thrown the rich code yet...

-21 means the evap is purging. You need to fix the evap

So what parts of the EVAP system should I start looking at to replace?