IDLE AFTER WARM UP - Team Camaro Tech
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post #1 of 11 (permalink) Old Aug 23rd, 02, 04:44 PM Thread Starter
 
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I have a '68 camaro that starts easy, runs great, but after the car warms up it does not want to idle. The camaro has a new holley carb.


1968 camaro 350/300 M21
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post #2 of 11 (permalink) Old Aug 23rd, 02, 04:50 PM
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What size carb? Vacuum or mechanical secondaries? Electric or manual choke or chokeless?

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'69 RS Camaro
355 5-speed 4.11

[This message has been edited by 1 2RUN (edited 08-23-2002).]
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post #3 of 11 (permalink) Old Aug 23rd, 02, 06:18 PM Thread Starter
 
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<BLOCKQUOTE>quote:</font><HR>Originally posted by 1 2RUN:
What size carb? Vacuum or mechanical secondaries? Electric or manual choke or chokeless?

<HR></BLOCKQUOTE>
CARB SIZE 670, STREET AVENGER, VACUUM, ELEC. CHOKE BUT NOT CONNECTED.

THANKS
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post #4 of 11 (permalink) Old Aug 23rd, 02, 06:30 PM
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You probably need to lean out the idle mixture screws when the engine is thouroughly warm.

It takes a while for the engine heat to warm up the intake, and then the carb will heat up and vaporize more fuel to the engine.

The engine will run rougher when cold but that's what chokes are for...
David

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post #5 of 11 (permalink) Old Aug 24th, 02, 08:23 AM
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hook up the electric choke to a keyed 12 volt power source on the fuse box. problem should go away. it isn't opening up as the engine warms up, thus starving the engine of the air it needs to operate.

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post #6 of 11 (permalink) Old Aug 24th, 02, 10:12 AM
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novaderrik,
Good answer!
David

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67 RS 327 original owner. 69 Camaro Vintage Racer, 65 Lola T-70 Chev SB Can-Am Vintage Racer
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post #7 of 11 (permalink) Old Aug 24th, 02, 12:09 PM
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hey, I'm good at the simple stuff...
only way i thought of the choke was that my beater 85 GMC truck has a Holley with an electric choke on it, which i neglected to hook up right away. it did exactly the same thing described here. hooked up the factory choke wire, and she runs like a champ.

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1971 Nova(looks like 69 camaro from underneath!)
355sb, vortec heads, HOT cam,T-10 tranny, 3.70 gears 16X8" IROC wheels. 12" Corvette brakes on the way.
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post #8 of 11 (permalink) Old Aug 31st, 02, 09:11 PM Thread Starter
 
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Thanks for the info, the elec. choke is wired and working.
I still have the same problem.
If you adj. the idle screw on the carb. it will work, but you must set it to 3,000+ RPMs
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post #9 of 11 (permalink) Old Sep 1st, 02, 05:37 AM
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Idle mixture screw, not the idle. Why 3000 RPM? I got lost on that one.

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Steve
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post #10 of 11 (permalink) Old Sep 5th, 02, 07:39 PM Thread Starter
 
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I will look at the Holley book that came with the carb to find the screws location.
If the idle is less than 3000 RPMs, the car will die, then back-fire.
I had this same problem with the old carb.
Could it be the advance curve springs in the distributor?

Thank you for your expert advice.
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post #11 of 11 (permalink) Old Sep 8th, 02, 09:53 AM Thread Starter
 
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I did some more adj. on the carb, and I think this problem is SOLVED. I believe a combination of air/fuel/timing and choke not being connected caused this problem. The car ran idle yesterday for 30 min. Didn't have enough time to drive it around, had to spend some quality time with the family.

Thanks for everyones help, couldn't have done it with you.

'68 camaro 350/300+, M21/4spd, stealth intake, holley street avenger, and "single- point" dist.
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