GmJackson53

Where is the bb mod for the thermostat? Lol

gbbmk

iTrader: (1)

I just did the port and polish to my 99. I love the throttle response however i have a huge problem. My idle is normally at 580-590 and its now at 880-1000. I tried resetting the ecm, I tried relearning the idle. I tried driving it. Nothing is working. I disconnected the IAC and there was no change? Vacuum is still great. I am so lost on this one. What the hell did I do? Is the IAC port getting to much air now? Is the IAC bad?

dmelvin

iTrader: (8)

Sounds like you may have gotten too close to the blade.

gbbmk

iTrader: (1)

What do you mean? The seal around it? or the blade itself? And if so whats my fix

Funkster

iTrader: (97)

He means where the blade would have seated on the actual throttle body. This would be allowing more air in and causing the raised idle RPM.

dmelvin

iTrader: (8)

Bingo

If this is what the problem is, the only fix that I know of is to get a new throttle body. Luckily for drive by cable they seem to be about a dime a dozen.

gbbmk

iTrader: (1)

in an effort to find out the issue. I checked the IAC and when i pulled it it fell apart. Im thinking brake cleaner killed it. Regardless if the TB is bad i still need to replace IAC.

Reminds me of when I needed to replace my alternator becasue I was cleaning the inside of the engine bay and got water inside of it. Live and learn.

Funkster

iTrader: (97)

If you unplugged the IAC before with no change I wouldn't expect it to be that. Can you post a picture of the throttle body, where it was ported, etc?

Not saying it isn't possible, and isn't an additional cause of problems, but I am curious to see the seating surface of the blade.

gbbmk

iTrader: (1)

I will when I get a free min. I am going to at least get a new IAC as this is my work truck/ DD and with out it I do not work. I very well may have gotten a little carried away with my grinding. If so I will pick up another one and start over.

I will try to get you pics today.

Thanks

gbbmk

iTrader: (1)

Ok so i replaced the IAC and the second I turned it on the truck the idle shot over 2500 and bounced there for a bit then i cycled the key several times and it came down to about 640. So me and my bright ideas thought OK lets relearn the idle again. Well i am back at 850. I will drive it for awhile I am also going to take apart the TB again and see if I did something wrong or something clogged. And take pics.

I do have access to a tb and intake set up complete used for $125. So worst case I do it again. Its driveable now but not acceptable.