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Re: Passing Smog [message #271190 is a reply to message #271125]

Wed, 04 February 2015 11:41

Wayne

Messages: 106
Registered: August 2004

Karma:

Senior Member

A few years back, mine failed just like yours.

I adjusted the idle screws and speed as per the service manual (GM called it the lean drop method) It then passed easly. To do it correctly you need a vacuum gauge and tach.

I have posted a photo of the page on our photo site. Here is the URL: http://www.gmcmhphotos.com/photos/lean-drop/p41047-lean-drop.html

good luck,
Wayne

Wayne Lawrence
76 Birchaven
Bellflower CA
w.lawrence@verizon.net

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[Message index]

		Passing Smog By: Jarrar on Tue, 03 February 2015 18:27
		Re: [GMCnet] Passing Smog By: Len Novak on Tue, 03 February 2015 18:41
		Re: [GMCnet] Passing Smog By: Jarrar on Thu, 05 February 2015 16:58
		Re: [GMCnet] Passing Smog By: James Hupy on Tue, 03 February 2015 18:46
		Re: Passing Smog By: Bob de Kruyff on Tue, 03 February 2015 19:24
		Re: Passing Smog By: bwevers on Tue, 03 February 2015 19:44
		Re: Passing Smog By: Jarrar on Wed, 04 February 2015 02:51
		Re: [GMCnet] Passing Smog By: Mr ERFisher on Wed, 04 February 2015 04:05
		Re: Passing Smog By: Wayne on Wed, 04 February 2015 11:41
		Re: Passing Smog By: Jarrar on Wed, 04 February 2015 17:08
		Re: Passing Smog By: mikeceli on Fri, 06 February 2015 10:07
		Re: [GMCnet] Passing Smog By: Emery Stora on Fri, 06 February 2015 10:36
		Re: [GMCnet] Passing Smog By: Sammy Williams on Fri, 06 February 2015 17:38
		Re: Passing Smog By: mikeceli on Fri, 06 February 2015 17:39
		Re: [GMCnet] Passing Smog By: Olly Schmidt on Sat, 07 February 2015 02:07

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