Quadrajet Problem Solving > Quadrajet Parts and Numbers

Advice on correct carb for 1988 P30 Motorhome (CA emissions)

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Ethan1:

--- Quote from: MarshallSF on March 13, 2014, 11:03:43 AM ---Thanks Ethan - appreciate your help on this.  Please let me know what you find out.

--- End quote ---

 Wrong carb, sorry. These are correct, 17085004 M/T and 17085212 A/T. I am pretty sure.

MarshallSF:
Looks like 17085212 is listed in the CA ARB executive order for these vehicles (EO A-6-418).  Thank you very much for your help Ethan.   :)

Cliff Ruggles:
Going by memory the 17085003/004 carbs were used on the Motor Home applications in and after 1985 till they went to TBI's. 

Those carburetors have special calibrations, and are not the same castings as the truck Q-jets used in the same period.  I have a few in the core pile here, but avoid them for anything other than a motor home application......Cliff

MarshallSF:
Hi Cliff - thanks for the information. I am seeing a 17085004 listed alongside the 17085212 in the ARB EO for my vehicle. Any idea which casting would be preferable? Today I managed to find a brand new, in-the-box 17085212 for a good price. Do you think this would be a good way to go? Would I need to update anything before using?

Thanks for your help - much appreciated.

http://www.arb.ca.gov/msprog/onroad/cert/mdehdehdv/1988/gm_hdoe2_a0060416_4d8-5d7-7d4-7d0-6d0_6d0.pdf

MarshallSF:
BTW - Cliff I'd love to hire you to rebuild one a proper casting for me if that's possible. However I've heard you're booked up to a year out.

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