What could cause my 2nd gear to be leaner than my 3rd and 4th gears. With little difference 3rd and 4th are pretty much the same. 2nd gear however is about 11.8, and 3rd is 10.5-ish at WOT. My tuner said he had no idea why it was doing that. Is it his tune or something else. Please chime in, as this is getting costly.

 

11.8 isent to lean just about right 3rd gear needs to the same as 2nd whne ur doing wot pulls you need to start from the same mph everytime when tuning

 

What I'm saying is, that 2nd gear is leaner, period, if we lean out the later gears to say a 11.8, then 2nd is in the 12's? It was done on a dyno and finished on the street. It is always consistently leaner in 2nd than any other gear, at any rpm.

What could cause that?

 

whos ur tuner

 

Arthur Wang. Owns a shop in Huntsville, AL.

 

p.e. is set incorrectly or tuner dosentknow what he is doing

 

pe could be set correctly but maf/ve is incorrect, or pe is not right and should richen/lean accordingly on the pe equivalency chart to make it even in all gears and all rpms.

 

It certainly looks that way.

 

Money lost, let it burn. I guess I'm just going to have to pay for the same thing twice. I went back up to the guy who got it closer to what it should be, but yeah, /thread I'm just going to get a new tuner. I feel like I have to keep teaching him how to tune my car, & he's the one with the lifts and dyno.

Thanks fellas.

 

Hmmm, I could have sworn there was a table for eq ratio modifier vs gear, maybe it was in the lnf pcm or something.

 

From the dead. I have figured it out. I paid the tuner to do my injectors because it was a two hour drive. It looks like he didn't Vaseline the O-Rings on the injectors/insulators. I noticed a hiss last night when I pulled over and popped the hood with the car running.

It would appear that because it's been warm that every time I have been out of my car with it running either the ac fan or the radiator fan has been on blending in that sound. One of the insulator O-Rings was torn and viola, vacuum leak. So now it's waaaay rich, but it's obvious by the change in the tune now that the leak is why the afr was wrecked.