Hello, I have a quick question. I have a 87TII all stock but I have a boost gauge and A/F gauge.

My question is at idle is the A/F gauge supposed to be in the RICH area? mine reads 2bars in to the RICH at idel! I thought it was supposed to read LEAN at idel and RICH when you put the pedal down? it smells a little Rich but I have not been able adjust the A/F to have it read lean at idel. What does everyones elses read?

 

rich well mine does at least but you will see it go lean when you let off the gas

 

adjust your TPS using the OHM method. im going through it right now. it should be at 1K OHMS when the throttle is at idle position then 4-6K OHMS at full throttle


read the FSM. under the fuel and emissions section there are a few pages on how to adust the TPS

 

I am asuming you do not have a wide band EGO guage by your post. AF guage normal do not pull a reading untill you get up on the car. Other words they are just chillin in a non responsive mode. If I am correct and you use a narrow band then it is usefull for nothing then tuning your closed loop system. So throw it out.

 

yea it doesnt sound like he has a wideband. if you are just using a single wire light show then dont bother trying to read it. those are worthless.

 

Thanks all, ya it is just a Auto meter A/f gauge not the wide band. But I will check my TPS to see if it needs adjusting or not. Thanks

 

mine reads 13.xx to 14xx but never over that. If I try to lean it out, the idle gets shitty.

 

mine sits one into the green
if that makes sense to you at all

 

on a wideband I was in the 11's. Yeah I'm running pig rich but I've got serious ecu problems.

 

what ecu are you running.

 

mine seems to like 13.1-13.2 with no load..

 

13 AFR give or take a couple of points. 14's will give you a puff, puff missing at idle situation.

If a person has a car with the airpump installed and a working ACV, the afr will be in the mid 14's using a wideband and if using a digital meter on a stock 02 sensor he'll see a lot of zeros's IF the stock emission system is working right.

If you have a car with no emissions, no airpump, then a narrow band meter(read Auitometer), will read rich or if using a digital meter to read it (read Fluke meter), it will read something like 0.7 vdc at idle.

 

S4 Rtek 1.5 TII ECU BUT it could be injectors or harness as well.

 

13's if I make it any leaner it will die and act crapy.

 

as lean as i can and have it still idle
haha

 

EVERY street ported turbo car i've tuned has read 12.6-12.8 at idle when its warmed up and i've monekyed with the idle to get it smooth (haltechs)

MOST stock engines seem to like around 13.2 +/- 1

Now i've never stuck the wideband on a bridgeport or a peripheral port.. but i've smelled the exhaust.. they have to be richer!!!!

N/a'S seem to be able to get a bit leaner.. mid 13's, most likely because of the higher compression