Need help tuning Fast idle and Choke on Edelbrock Performer Q-Jet - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ryan68 · 06-01-2004, 12:09 PM

I had my carb all nice and tuned when I bought it in November, and now that is was getting summer here in AZ, I had to swap out the 185 degree T-stat for a 160 degree T-stat. This bovious is gonna mess up the choke and fast idle. But how do you adjust it. The fast idel disengages, but not all the way, it need to go about another 1/8". And if the choke is adjusted, does that change the adjustment on the fast idle cam?

Thanks for any info.

ryan68 · 06-01-2004, 12:09 PM

Oooops, forgot to mention it's electric choke.

Jeepster376 · 06-01-2004, 12:23 PM

You adjust the choke application by bending the link that connects the electric module to the choke shaft. Then you loosen and rotate the choke housing to adjust the time for that the choke takes to come off after starting.

If your choke never fully opens, you probably need to bend the link a little, It should be done while the engine is cold. Bend the link so the choke plate closes just barely to the fully closed position.

cdowns · 06-01-2004, 04:59 PM

by changing the thermostat there should be no need to change your carb in fact the difference in thermos will probably only affect the engine temp for 10minutes or so on initial startup

06-01-2004, 12:09 PM	#1
ryan68 Certified Chevy Man Join Date: Jan 2000 Location: Tucson, Arizona, United States Posts: 2,053	Need help tuning Fast idle and Choke on Edelbrock Performer Q-Jet I had my carb all nice and tuned when I bought it in November, and now that is was getting summer here in AZ, I had to swap out the 185 degree T-stat for a 160 degree T-stat. This bovious is gonna mess up the choke and fast idle. But how do you adjust it. The fast idel disengages, but not all the way, it need to go about another 1/8". And if the choke is adjusted, does that change the adjustment on the fast idle cam? Thanks for any info. __________________ 68 Chevy CST (327,TH400) 3/5 drop lots of fun stuff 71 Suburban 4x4 (350,TH350) 7" lift 37's, D44/14 bolt and other sorts of goodies, lockers front and rear, flexes 40", 895 RTI score Check out my web site!!! http://www.geocities.com/cst68chevy/

06-01-2004, 12:09 PM	#2
ryan68 Certified Chevy Man Join Date: Jan 2000 Location: Tucson, Arizona, United States Posts: 2,053	Oooops, forgot to mention it's electric choke. __________________ 68 Chevy CST (327,TH400) 3/5 drop lots of fun stuff 71 Suburban 4x4 (350,TH350) 7" lift 37's, D44/14 bolt and other sorts of goodies, lockers front and rear, flexes 40", 895 RTI score Check out my web site!!! http://www.geocities.com/cst68chevy/

06-01-2004, 12:23 PM	#3
Jeepster376 Registered User Join Date: Feb 2004 Location: Massachusetts Posts: 269	You adjust the choke application by bending the link that connects the electric module to the choke shaft. Then you loosen and rotate the choke housing to adjust the time for that the choke takes to come off after starting. If your choke never fully opens, you probably need to bend the link a little, It should be done while the engine is cold. Bend the link so the choke plate closes just barely to the fully closed position. __________________ 72 Cheyenne Super 4x4 SWB Last edited by Jeepster376; 06-01-2004 at 12:30 PM.

06-01-2004, 04:59 PM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	by changing the thermostat there should be no need to change your carb in fact the difference in thermos will probably only affect the engine temp for 10minutes or so on initial startup __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

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