Cleaned TB (high idle)

[Anthony Yacullo]

Cleaned TB idle is at 1k right now, should I just unscrew the BISS a little?

 

[cdvip]

I wouldn't mmess with it until you check for any leaks or something loose. You could have knock something loose around the tb when you were cleaning it. The iac could be acting up from whatever you used to clean. But I'd wait to mess with biss screw more like a last thing.

 

[Priority DSM]

I would drive the car for a while and let the ECU relearn its idle. If the ECU was ran with a dirty TB then the ECU compimsated the TPS to run the correct idle. Without the gunk there is more air flow between the throttle blades now hence higher idle. 1k isn't that bad.

Unless you are running ECMlink I would ride it out for a few days.

 

[rydnkd]

Do you have link?

 

[2gmitsueclipse]

When cleaning the TB, you are suppose to block the small holes at the bottom as it can damage the sensors.I would also try resetting the ecu first. If that does not work, try a boost leak test, then testing sensors.

 

[Anthony Yacullo]

Yes I got link and I put tape over the holes.

 

[2gmitsueclipse]

I would not recommend adjusting the Biss screw at this point. Check out the other advice first.

 

[Anthony Yacullo]

Well privously I turned it up when I got link, I bought it used and it was set for somebody elses car so I had to go through there change settings and I adjusted the BISS. It was running 750 rpm at the time, the ecu currently has a tune. Thanks for all the information.

 

[2gmitsueclipse]

Using Link would be by far the easiest way to adjust the Biss screw. You just need to make sure the sensors are in good working order on the TB and even more important, no boost leaks. I had idle issues when I first installed Link. I found that the shaft seals on the TB shot and one fuel injector seal as well.

 

[Anthony Yacullo]

Using Link would be by far the easiest way to adjust the Biss screw. You just need to make sure the sensors are in good working order on the TB and even more important, no boost leaks. I had idle issues when I first installed Link. I found that the shaft seals on the TB shot and one fuel injector seal as well.

Okay I will see whats happening.

 

[blktalon3]

Did you have the butterfly valve out? If you did I'd almost bet it's not getting seated all the way. It doesn't have to off by much to raise the idle and it's hard to see if it is off. Back the screws that hold the butterfly in place out a little, open the throttle and let it snap closed a couple times. Then retighten the screws that will seat the valve in the proper place

 

[1990TSIAWDTALON]

+2 on thottle plate AND how are the throttle shaft seals? You could have cleaned some gunk away from the seals that might be leaking now also but if you had the butterfly out, do check that it seats properly and is in correctly. Easy to turn it around so I always write "UP" and "OUT" on mine so I get it back in exactly the way it came out. Also, are the 2 springs wound correctly and tight. I don't know if you had them off but ALWAYS draw a straight line with a sharpie across the outside spring then rewind BOTH springs together when reinstalling. Just some tips. Keep us posted.