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Re: [GMCnet] Passing Smog [message #271294 is a reply to message #271293]

Fri, 06 February 2015 10:36

Emery Stora

Messages: 959
Registered: January 2011

Karma:

Senior Member

What CATALYTIC CONVERTER are you talking about?

Are you really not aware that the GMC motorhome was never equipped with a catalytic converter?

Emery Stora

> On Feb 6, 2015, at 9:07 AM, Mike Celi wrote:
>
> 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. 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!
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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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