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1989 screamer
#10
What a journey. IAC was defeated using clay duct seal but it would move out of the way suck a bit into the TB and fail to stand up to the vacuum. Two attempts of this fail.

Jerry it is a 3 speed sorry for the confusion the vac modulator had a open circuit on the trans side aka screamer.

Did your line the bore with tape prior to clay seemingly sealed. Hopefully stays blocked forever haha

ISC i made a paper gasket from oil filter top just two holes and some rtv and inserted it to block the 3 holes.

300 rpm on the tach runs smooth. Winning

Unblocked ISC warmed up 150f ecu held 800 to 900.

Somewhat in control now. I have the egr vac line disconnected and my vac gauge on it reading 20hg steady
Evap line is disconnected from the manifold as well.

Cold start Dash pot i have hardlined onto the manifold bypassing the VSV valve for a non ecu controlled start

Just restarted it semi cold 1200 rpm in park
800 to 900 in drive steady vacuum.

Its seemingly happy with this configuration but i want to hook up the egr for the inert gas. My only thing is the top of the vacuum switcher on top of the bark tube. Does that not pull fresh air through the sponge down the P back to vsv and mani?

Cracked the outer thread of the iac housing using a hammer to hit and and twist the Philips out. Epoxy the crack got lucky. You can turn that funny plate with a 17mm if the threads good using a 17mm on the 6 round knubs. Will make a tool drilled washer welded on a 3/8 extension to be able thread up leaky ones onto the IAC needle.

By moped fuel valve to do you mean a fuel tap or petcock on off to control the vacuum on the cold start dash pot? It appears you T'ed in on the vsv supply from manifold to cause the dash pot to bump 500rpm until the ISC takes over?

Misery loves company will keep putting it together and test the headlights rpm idle up etc. Wicked diagrams and labeled air paths love your notations added to make things extremely friendly to read condensed.

Tomorrows a big push to road test on the street underload will keep posted.
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Messages In This Thread
1989 screamer - by Flamecat68 - 06-30-2021, 02:54 PM
RE: 1989 screamer - by fixkick - 06-30-2021, 10:02 PM
RE: 1989 screamer(what tranny?) - by fixkick - 06-30-2021, 10:22 PM
RE: 1989 screamer - by fixkick - 06-30-2021, 10:39 PM
RE: 1989 screamer - by Flamecat68 - 07-01-2021, 05:58 AM
RE: 1989 screamer - by Flamecat68 - 07-01-2021, 06:11 AM
RE: 1989 screamer - by fixkick - 07-02-2021, 02:38 AM
RE: 1989 screamer - by fixkick - 07-02-2021, 02:41 AM
RE: 1989 screamer - by jwunsch - 07-02-2021, 11:48 PM
RE: 1989 screamer - by Flamecat68 - 07-06-2021, 03:20 PM
RE: 1989 screamer - by jwunsch - 07-06-2021, 07:41 PM

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