ITRCA

i just installed an edelbrock 65mm CARB legal throttle body and Skunk 2 pro series intake manifold. however, since installing, i have been having horrible trouble with my idle. it will not want to idle when cold, then when hot it is at 900 then if i drive it it is just over 1k and if i hit vtec it is surging from 1500-2500. does anyone have experience with the edelbrock tb because that is the only thing i can think of that might cause this as i have never heard of this problem with the skunk2 manifold. oh, and btw, i am getting a cel for the iacv and have replaced it 2 times and it is still being a problem.
thanks,
jon

Have you checked your wiring?

there really is no wiring. and yes i have checked it. the only wires there are is the tps, the map, the iacv. i have checked the vacuum hoses for leaks. i have checked the gaskets for leaks. and they are all fine.

Curious, How did you check for leaky gaskets?

my mechanic sprayed the area with cleaner and looking for bubbles, etc.

Oh, ok. were you there at the time? did you notice any difference in the idle when he was spraying?

also do you have any sort of device pliced into your ECU?

i was right next to him. there was no change in the idle at all while he was spraying.

So hard to diagnoss over the internet, sorry.
Where are you located, there might be a good tuner near you that could help.

i'm in san diego
the mechanic i go to was the lead mechanic here for years and was the highest paid mechanic in sd. but he isn't sure.

b18cinteg96 wrote:there really is no wiring. and yes i have checked it. the only wires there are is the tps, the map, the iacv. i have checked the vacuum hoses for leaks. i have checked the gaskets for leaks. and they are all fine.

I was primarily concerned about the iacv wiring, did you test it per the manual? (if there is a test section in it). This sound like IACV all the way, and I highly doubt that you just keep getting bad IACVs. My bet is still on the IACV related wiring.

Did you bleed the coolant? IF you take carb cleaner and spray it on the TB and IM and hear a change in idle then you have a leak. I'm more inclined to say that it has something to do with the IACV though.

Let us know

Are you running the stock ecu ? maybe its the problem

yeah i am running the stock ecu, but it is the same ecu that runs my friends 2.0L itr fine. I have just ordered 2 new throttle body gaskets as well as the "8" o-ring on the iacv. i know the iacv is good because it came off my old motor and worked fine. I think my original was fine as well becasue it worked until i installed the im and tb. I'll keep everyone posted on what fixes it.

1-Bleed the coolant
2-Make sure you used the gasket with the EDELBROCK throttle body
3-Make sure you have the MAP and TPS plugged in to the right sensor (yes they can get flipped flopped)
4-Hopefully you just unbolted the IACV valve and didnt unhook the lines cause you may have the lines backwards and causing a hunting idle for the fact the cars looking for a cold start valve which you aint got

Try these things and your problem lies in there.

Also did he scrap all the old gasket material off the head?? May have a leak there.

I had a similar problem my vacuum line pooped out also my throttle cable was loose i could feel by giving some throttle that it would stick sometimes. U should check and adjust the cable also there is a long screw with a spring underneath the butterfly on the throttle body check if it's loose