Crazy Idle

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Apr 8, 2013 | 04:19 PM

Navy01Coupe

Thread Starter

Racer

Joined: Aug 2005

Posts: 262

Likes: 51

From: Dallas TX

Crazy Idle

Ah the joy of your first C3.

I took the air cleaner off bc I knew that the vacuum plugs were actually ends of rubber tube closed off with electrical tape. I put proper plugs on and now it idles crazy fast! I was doing 20mph in first w/o my foot on the gas. (In 4th I was doing 40mph w/o touching the gas pedal)

Upon getting it back home, checked the idle speed and it varies from 700 to 1250 on its own. Is this a case where the timing is off and I need to start there?

1970 L46. 40 yr old everything (not numbers matching).

Apr 8, 2013 | 05:04 PM

DucatiDon

Melting Slicks

Joined: Oct 2011

Posts: 2,748

Likes: 90

From: Sacramento California

C2 of Year Finalist (performance mods) 2019

2018 C2 of Year Finalist

sounds like a vacuum leak. How did it idle before you plugged the hoses?

Apr 8, 2013 | 06:29 PM

drwet

Melting Slicks

Joined: Dec 2009

Posts: 3,195

Likes: 632

From: Thunder Bay

Do you have your vacuum advance hooked to manifold vacuum? I have had this problem when I had the vacuum advance hooked to a ported vacuum source.

Apr 8, 2013 | 06:31 PM

Jeff_Keryk

Drifting

Joined: Feb 2005

Posts: 1,879

Likes: 38

From: Los Gatos CA

Maybe your choke is stuck on high speed tang?

Apr 8, 2013 | 07:02 PM

SH-60B

Melting Slicks

Joined: Mar 2008

Posts: 2,989

Likes: 198

From: Meriden CT

Broken or missing mechanical advance spring can jack with the idle.

Apr 9, 2013 | 09:33 AM

Navy01Coupe

Thread Starter

Racer

Joined: Aug 2005

Posts: 262

Likes: 51

From: Dallas TX

It ran okay before I 'fixed' the bubba plugs with real ones. Not fast, not slow. I tried putting them back on, but same issue.

This weekend I'm going to go over to my buddy's house and we are going to check the timing (he has a gun).