Author Topic: '66 Hard to start warm temps  (Read 111 times)

Offline ourkid2000

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'66 Hard to start warm temps
« on: June 12, 2025, 06:05:53 AM »
Good day all,

I have a pretty consistent problem with my '66 Toronado being difficult to start in the first start of the day when the temperatures warm up for the summer. Just looking for some advice on where to start. Original, '66 Qjet on the car currently.

My suspicion is that when the temps get warmer, something with the choke isn't setup properly but I'm not sure if it's a lean or a rich problem. Does that sound like I'm on the right track? The carb is in good condition and the car runs absolutely superb other than this one issue.

When the temps are cold, I don't seem to have this problem even after sitting a couple of days. One or two pumps to set the choke and it fires right up after about 3-4 seconds of cranking.

Now, with the temps getting a bit high, I give it one pump to set the choke and try to start. Consistently, it almost immediately fires but quickly dies and I have to crank it and pump it to get it going again. After that, she's good for the day. I wonder if it is the choke pulloff not opening up enough just as the car starts and it chokes it out?

Other observations:
- The accelerator pump is one from Cliff. I know his are the best in the business so I bought one and installed it myself.
- If I watch the carb when I operate the throttle, I see a good pump shot on the first movement of the throttle but they get weaker and weaker. By the 3rd pump shot, there's barely any fuel coming out. I checked, there is plenty of fuel in the bowl even when the pump shots are weak. I'm not sure if this is normal or not.
- I have the carb on the bench currently with fuel in the bowl and a paper towel underneath checking for leaking well plugs. It's been 24 hrs now and I see nothing on the sheet so far and there's still fuel in the bowl.
- When the temps are fairly warm, should the choke butterfly be totally closed when you first set it?
« Last Edit: June 12, 2025, 06:14:24 AM by ourkid2000 »

Offline ourkid2000

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Re: '66 Hard to start warm temps
« Reply #1 on: June 12, 2025, 06:13:27 AM »
this one reply was posted in error, sorry

Offline ourkid2000

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Re: '66 Hard to start warm temps
« Reply #2 on: June 12, 2025, 06:42:14 AM »
jeez, sorry made another post in error! Uggh, I think I keep hitting the quote button rather than the modify button to make some corrections to my original post. I'll figure it out someday! Sorry again!
« Last Edit: June 12, 2025, 07:01:18 AM by ourkid2000 »