is there anything you can do to the IACV into thinking its 160 degrees, ever since
this cold weather has come around in CA, I've been getting a fluctuating idle.
I've bypassed all the coolant lines going into the TB, IACV, Fast idle valve, never
had a problem before. So is there anyway to trick the signal or is the IACV a input from the ECU, and the coolant temp controls the IACV ? sorry if this doesn't make sense im sleepy lol

 

Uh,... bypassed all the lines to the EACV???... Obviously the EACV cannot control the idle if you don't give it a coolant line. Why would you think it could? I would rrun the coolant line back to the EACV. Warm the car up. Remove the connector to the EACV. Adjust the TB idle screw to about 500 rpm. Then turn off the car. Reconnect the EACV, reset the ECU. and she should idle just fine.

Why would you bypass the EACV coolant is beyond me.

Randy

 

i have that same problem on my 96 ls turbo, so you are saying just disconect the IACV and mess with that screw? How will you know when its at 500 rpms, my rpms will drop when doing it or no? than plug it back in? Right now if i leave it off i idle at 1400 if its connected it goes from 1k-2.5k up and down. let me know, is this sensor bad or just needs to be fixed/adjusted?

 

Put the lines back on, no hp to be gained, just headaches.

Dyno tested also!

 

The only things I bypassed was the TB and ran the lines to my water cooled bearing housing. Maybe try to conect at the least the IAC and see how it works...

art

 

you think so? I don't know ever since I've bypassed most of the coolant lines, the intake manifold is actually cool enough to put your hand on with the motor warmed up. I actually leaned the idle out a little that somewhat helped.