Why does this engine want to idle at 1500RPM

[joecar]

No hole in the blade, just a ls2 Holley 90mm tb out of the box.

No tranny didnt die from low pressure? Did I miss or overlook something

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Ok, do this:

With engine running, remove IACV from throttle body, you should hear a large airleak at the IACV bore... plug the IACV bore using your thumb, what happens...?

Stick your finger inside the bore and plug off the air passage, what happens.

Is this IACV the correct on for this throttle body...?

[sparkinak]

Your log had quite a few EGR codes. Is there any way it could be getting air through the EGR at idle?

No egr on this. I noticed that as well and will correcting the egr setting codes on next upload....

Ok, do this:

With engine running, remove IACV from throttle body, you should hear a large airleak at the IACV bore... plug the IACV bore using your thumb, what happens...?

Stick your finger inside the bore and plug off the air passage, what happens.

Is this IACV the correct on for this throttle body...?

Thats what I will check today is make sure I have the right iac for that tb. In the instructions for tb it does not specify exactly which iac it needs.

I am kinda confused on the tranny question/comment. When I did the top end of the motor I decided to go thru trans while it was out. The clutches and steels were burnt so I replaced them with reds, replaced the sprags and then checked clearances etc.

I litterally hosed the engine with brake clean and I pulled the vavle and it lets air out and when I flipped it around the seal was good I could blow in. I also hosed that down and no response in idle.

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[sparkinak]

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[sparkinak]

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[sparkinak]

Hose clamp was on, checked hose for cracks and what not

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[LastCall]

Air is coming in from somewhere. Your set screw looks pretty far out. Can you back it down a few turns so the TB blades closes further.

If you can't control the idle with DVT controls, I think you may have an issue with the IAC or its wiring.

[sparkinak]

I backed the screw out so there was an 1/8th inch gap.

Im leaning towards either busted oring, wrong iac.

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[sparkinak]

Iac out revs up.

Thumb over iac hole idles down.

Finger covering air passage inside bore it dies.


The IAC I have is the correct one needed for the holley tb

[LastCall]

Iac out revs up.

Thumb over iac hole idles down.

Finger covering air passage inside bore it dies.


Sent from electronic life sucking device.

So when you cover hole where does it idle down to (roughly)? Can you take a picture where the set screw is now?

Looks like the Edelbrock IAC is a factory replacement piece:

https://www.summitracing.com/parts/e...5/applications

[sparkinak]