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Re: Passing Smog [message #271293 is a reply to message #271125]

Fri, 06 February 2015 10:07

mikeceli

Messages: 20
Registered: January 2015
Location: N. Ca.

Karma:

Junior Member

http://www.carsdirect.com/car-maintenance/7-common-reasons-for-failing-an-emissions-test

Cali wants the OP's GMC and all older vehicle, CRUSHED.

I recommend you NOT deviate from OE tuning specs(plug gap) , except perhaps retard the ignition timing 2-3 degrees. (cali allows only so much timing retard/advance or it's an automatic failure. I'm not sure how much, 2-4 degrees or so)

This sounds like a job for someone like Applied GMC, in Newark, Ca. The ignition system, carb, catalytic converter should be tested and repaired as indicated.

If you feel you can.........spray a can of carb cleaner, in the carburetor, slowly while keeping the engine running. CAUTION MUST BE DONE PROPERLY TO NOT CATCH FIRE After cool down, Id pull the plugs again, put 3 OZ. of Seafoam (avail at NAPA, O'Reilly's, Walmart) in each cylinder. Let it sit, overnight, then before installing the plugs, crank the engine to expel the Seafoam. Install new or KNOW GOOD set of OE spec spark plugs.
(NOT Bosch Platinums)!

These procedures will make smoke like HecK! Possibly not doable in SC, CA. Your gonna want to change the oil and filter, after the above treatments.

The ignition wires, cap, rotor, coil will need testing, professionally if you don't have the tools and knowledge.

You might end up needing a new CAT (if originally equipped). Cats are tested by measuring the input and output temps, with the engine running. Also, strike w/ rubber mallet, to hear loose, cracked substrate. If you have the OE "Pellet" CAT, it's likely failed. That is another "cali NIGHTMARE! Cats must be CA. Certified which raised the prices from approx. $80.00 to $400.00.

THEN, the idle will need to be set to OE range.

GOOD LUCK!

[Updated on: Fri, 06 February 2015 10:09]

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		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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