What exactly should i do here, something is throwing my IAC way up!!


Before I unplugged it, it would idle around 2k then shoot up to 3k after a while. Now its staying around 1800. The IAC values were at 150-170 on idle and they shold be around 50-60 am I correct. Something is very screwy here. No its not the IAC valve either because we tried 3, one out of a finely working car.

 

Man, I really don't know what's going on there but it has to be your vacuum lines somehow. Sorry I couldn't help.

 

Yeah, that seems like you have a vacuum leak elsewhere. Do you have a boost/vacuum gauge?

 

Theres no vacuum leak anywhere, I have the boost gauge but I unhooked it so I could run straight up lines and not have to worry about that leaking for now.

 

What are the MAF readings?

Did you set up the MAP correctly? (There's something about topswaps and one bar/two bar MAP setups, IDK what it is exactly, cause I went straight L67 lol)

My IAC reads ~50 at start up and it lowers to 20-30 as the motor warms up. These are rough figures, but the numbers you're getting are HUGE dude. Check the wiring to the sensor.

How much vacuum are you getting? It should be around 20 inches of hg at idle (or~10 on an Aeroforce).

 

Well i was getting 20lbs of vac, but then the cheap hose to my gauge melted.... Ive given up on it, its going in tomorrow morning. All of sensors are hooked up but the bbv but Im not making any boost...

 

Well you're not supposed to make boost at idle... You can bypass the BBV, which I'm pretty sure you've already done that.

 

Can you scan your TPS when the car is off? It's possible that your throttle position is too high. As far as that line lemme check my car and edit this post because I need to look.

EDIT- I don't know if the Gen 3 LIM is different in the vac line routing but, do you have the vac T going from the LIM to the fuel rail and the other side going to the MAP. The line you are plugging is the PCV right? I would unplug the BBV and see what that does. The other thing I would try is open your oil cap but keep your finger on the line you did in the video.

 

Well its a lot better now. I replaced the maf, got the vac lines figured out and bypassed the BBV. Also the TPS was faulty and at 11% but now it just sounds cammed. This is what we figured out.
Front o2 says its running lean, so its adding i think 20% of fuel at idle. So I think I need to change my front o2 out and then get it tuned.
When you tuned yours, what all tables did you have to change?

 

Not sure I didn't do the tuning myself. I know he took out a bunch of check engine codes did MAF tuning and we had to do spark and fueling. What kind of MAP are you running? Your car should run with either or of the MAP or MAF unplugged. So if you have the MAP unplugged it will read the MAP instead and vise versa. I am not running my stock MAP either. For some reason my car will not start with it on there. I am running a MAP from a 2005 Grand Prix GTP. Your TPS should only read like .04 at idle so 11% is really high. When I installed my stuff my North* plate was making the throttle go to 3000 RPMs when I started it. Had to trim the plate down and now it works so I feel your pain. lol