TIAL BOV springs

[green-lantern]

9 was too loose for mine. I use the 11. Make sure before you drive it to pull the spring open with a vacuum pump. Mine was stuck shut fresh out of the box. 28"HG on the vacuum pump couldn't pull it open. I lubricated the seal with a little silicone compound and it hasn't stuck since.

The spring should be bought based on the amount of vacuum you pull at idle. Altitude can affect this.

Jeff

I have the turbos off at this time so I cant look at the vacuum at this moment. I kind of figured our cars were about the same (as far as vac @ idle). I'll get the 11

[Patryn]

I noticed issues with mine on decel for some reason. Blitz DSBC reads about -57 kg/cm2 on decel. When that happens the AF's on the wide band actually go rich, when it should be lean on decel. 11 psi spring too.

[kywhitelightning]

I noticed issues with mine on decel for some reason. Blitz DSBC reads about -57 kg/cm2 on decel. When that happens the AF's on the wide band actually go rich, when it should be lean on decel. 11 psi spring too.

Have you checked your idle position switch?

Jeff

[Patryn]

Idle position switch? Not sure if its the same as the TPS, but TPS reads 14.5 when closed or no foot on throttle.

[kywhitelightning]

Idle position switch? Not sure if its the same as the TPS, but TPS reads 14.5 when closed or no foot on throttle.

The TPS has a switch and a potentiometer built into it. The potentiometer gives the actual throttle position and the switch tells the ECU that the throttle is closed. Socket 1 should have 5VDC with the key on for the potentiometer. Socket 2 is the sensor wire giving feedback to the ECU. Socket 3 is the return for the switch to the ECU. Socket 4 is the ground feed for the switch and the potentiometer. With the throttle closed you should have a low ohm value between pin 3 and pin 4(I got 200-300 ohms on mine). I tested mine with the connector off. With the throttle open it should open the circuit.

Jeff

[Patryn]

Yes, stock MAF in my case, though the HKS does not do this and it vents to the atmosphere as well. I'm assuming the tial just does its job too good. In hindsight I should have bought the Tial BOV version that plumbs back in since I don't really ever plan to go blow through or speed density.