blink962

Hi
Okay,i found my car is not pulling boostin anymore..(pull only on 3-4th gear)
I noticed that vaccum seems hard to reach 0 ...(more on 1st-2 gear)
Car run rich something while crusing
Something drop to 10.0 at idle

When i come to a stop,sometime rpm drop to 600 and goes back to 1200 and stay at correct...

What could be my problem?

blink962

Would a pinched vaccum hose could cause that?

blink962

Also ems read ...like 6 air/fuel on ems and 12 on gauge!?

liquid_helix136

trust the gauge, the EMS is just reading a voltage from the gauge and interpreting it via parameters that you can change (O2 Gain) make sure that they are both on solid grounds and the wideband wire is plugged into the ECU directly, and not T-tapped onto the stock o2 sensor.

If you aren't showing any boost, thats why you are running rich. The ECU is still fueling for Xpsi of boost, but you aren't getting that much air, so there is way too much fuel.

Figure out why you aren't creating boost and that problem should go away. However you do need to make sure your wideband sensor and the software are synced up first, that could cause some serious problems if you are using O2 feedback.

soulicious

Your fuel type might not be set to gasoline in the EMS setup (Assuming AEM EMS). In your calibration, select a different fuel type (even if its set to gas) and hit Enter on your keyboard. Then go back and select gasoline and hit the Enter key again. I believe it's some type of bug.

blink962

The gauge dont really show boost but if i put my hand in front of blow off,and rev little bit,i see that are pressure coming off from BOV,
Also,wideband is not grounded with the ems. And

the car was running with the wideband t tapped to the stock 02 sensor?
I should complety cut the wire?
I can give datalag if someone wants!

blink962

What do you means if i use 02 feedback?!

liquid_helix136

Having it T-tapped is the problem. You will need to cut the wire unfortunately. I did this at first as well with similar problems.

O2 feedback is using the wideband o2 sensor to target specific AFRs at certain ranges. So if the fuel map at a certain point yields a 14.4 AFR, but o2 feedback is set to 14.7, the computer will automatically pull some fuel to correct for it. Really awesome for highway cruising and such, but it overshoots easily and isn't good for fast changes like high load areas.