Cold startup issue

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Aug 14, 2010 | 11:14 PM

Ethan1

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Cold startup issue

My friend has a '74 L82 Corvette and has been having a problem with it on cold startup. I guess from what he told me, when starting up, choke closes and then starts. But, when he gives it gas, there is a hesitation. When warmed up, it runs perfectly fine. I gave him a nother Qjet w/ electric choke and it does the same thing. Could it be timing? Any suggestions are helpful.

Thanks,
Ethan

Aug 15, 2010 | 01:24 AM

BPHORSEGUY

Melting Slicks

Joined: Jul 2010

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From: SUFFIELD CT USA 2023 C8 CORVETTE UN-MODIFIED FINALIST

2023 C8 of the Year Finalist - Unmodified

It is normal for a carburated engine to have hesitation for the first minute or two, how cold a cold start are we talking, the car should run fine after about two minutes of driving!

Aug 15, 2010 | 09:21 AM

Paul L

Team Owner

Joined: Aug 1999

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From: Ontario

They do stumble when cold. I would say what you have described is normal. We can become spoiled by the cold driveability of modern fuel-injected cars.

Aug 15, 2010 | 10:45 AM

7T1vette

Team Owner

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From: Crossville TN

The carb and choke adjustments need to be reset according to the Chevrolet Chassis Service Manual instructions in the "Fuel System" section [6M].

Aug 15, 2010 | 10:55 AM

fishfryer

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Maybe the ignition system is a little weak too, but if it runs good after a few minutes, then I wouldn't worry too much.

Aug 15, 2010 | 06:41 PM

Rich's'78

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Joined: Nov 2004

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From: Oakville ON

Quote:

Originally Posted by 7T1vette

The carb and choke adjustments need to be reset according to the Chevrolet Chassis Service Manual instructions in the "Fuel System" section [6M].

When the choke is properly set up, the car will run fine until hot. Mine does! There is more than just choke plate opening rate to to get the right balance with the fast idle setting.

Aug 15, 2010 | 07:49 PM

PeteZO6

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From: Cameron Park CA

Quote:

Originally Posted by Rich's'78

When the choke is properly set up, the car will run fine until hot. Mine does! There is more than just choke plate opening rate to to get the right balance with the fast idle setting.

TOO. When I had the stock setup on my '69 which I drove 132,000 miles, I don't recall ever having a drivability problem when cold or hot. At least not when it had a fresh tune. Now my current setup with no heat to the crossover, is another matter. I have to be careful with the throttle until the engine is warm.