1984 Buick GN Turbo Upgrade, 3k idle

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Gn.Cal

New Member
Joined
Dec 17, 2025
Messages
1
Hello all, I am new to this forum and glad to be a part of the Turbo Buick group. This being said I’ve always wanted a Grand national and finally got myself a 84 Buick hot air GN. It has originally 64k miles. It sat with the previous 1st owner for 20 years. Once I took owner ship I decided to replace stock parts Water pump, gaskets, spark plugs etc. Ran great, then decided to get some more power behind the wheels.

That being said, now I can’t figure out what’s going on with the car.

What’s new

1. 84/85 Turbo stage 1 upgrade from work turbo.
2. Upgraded stainless steel headers
3. Upgraded down pipe from G body.com
4. Upgraded exhaust from pypes.
5. Upgrade LS1 maf
6. 86/87 ICCM with coil
7. 86/87 computer
8. Turbo tweak chip
9. Scan master 2.0

This is all that was upgraded/updated.

The car starts off with an extreme high idle at 3k and can’t find out why. I also tried the smoke machine to see if any air leaks and seems all is sealed up.

Im really stuck and wanting to give up.

Thanks for all your guys support and help. Much appreciated

(Sorry typing this on my phone)
 
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