Author Topic: Setting Up a Fresh Rebuild  (Read 2021 times)

Offline Kubs

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Setting Up a Fresh Rebuild
« on: September 30, 2015, 09:52:22 AM »
I just finished a rebuild on my 7041213 Q-Jet with a kit from Cliff.  First off, I set the idle mixture screws about 3-3.5 turns out.  I read anything from 1 turn to 8 turns so I matched up the corrosion marks on the old screws.  I figured this would be a good starting point.

Now, to continue dialing it in.  It is getting colder up here in Ohio.  About 60°F to low 50s°F in the evening.  Will this make a big difference in trying to set up the carb?  Should I do it again in the spring/summer when it warms up again?

Offline 429bbf

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Re: Setting Up a Fresh Rebuild
« Reply #1 on: October 01, 2015, 06:31:20 AM »
welcome to chp . once you get the carb dialed in , choke, h.i. etc. you will not have to change anything for weather condition. it will work from 100.above to 30 below. fwiw

Offline Kubs

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Re: Setting Up a Fresh Rebuild
« Reply #2 on: October 01, 2015, 09:10:55 AM »
Thank you!

I guess my main concern was making fuel related adjustments in the cooler environment when the fuel is more dense.  The car fired up in less than 5 sec of cranking but idled kind of rough until it warmed up, then it was idling high (around 1400rpm).  I think my choke pull off is bad.  I tested it with my finger during the rebuild and it was fine, but maybe somewhere along the way before I put the carb back on the 40 year old piece decided to give up.  It did not pull open the choke any after starting and I had to push it in with my finger for it to stay there.  Since the pull off was sucking air the idle mix screws did next to nothing, and the extra air is why the idle is so high in my opinion.  I will finish tuning when my new pull off arrives.