New Problem with stalling

My configuration doesn't use a heat tube. Only the electric portion.

 

Out of my league. Never had a pure electric choke setup that didn't work. Still, if there's a resistance problem...

 

Everyone is assuming the choke does not work. It does. My assumption that in temps of the sort we get in the summer that the choke needn't work as it will be open and is open when it's this hot.

I can only assume that there's something else going wrong to cause this secound start of the day problem.

 

im with you jefe, sounds like something else, cause its happening on all the carbs......
????? ill keep on scratching.
my head that is, to try and figure it out....
good luck

 

Somehow, it's not mixing air/fuel properly. Either the fuel isn't evaporating from the engine/ambient heat or the lever that the choke controls is sticking open or shut. The only other thing is that the plug gap is off or not enough spark to light her up.

 

I'm the only one who has suggested checking it, and I'm far from being everyone!
My theory is that it a long cold journey down the log for the gas to even get close to the combustion chambers, and the the choke aids that delivery by helping provide extra vacuum. But if it's too hot the choke will indeed be open and not part of the equation. I typically pump the gas a couple of times if the car has been sitting.
I also agree that this may not have anything to do with the issue, it's just something else to check, amongst other things. I have also suggested PVSs. There are probably a couple on your car. They crack and become loose-fail at the base. The vacuum modulator on the choke plate can also be adjusted, we find they provide better cold idle when tightened up, here where it's cold.
Tuning these things is, I think more of an art than a science. Compared to a computer controlled car there will always be these little inconsistencies.
How many turns out is the idle mix screw?
You could try capping of the vacuum source to the distributor and see how it performs.

 

As far as I'm concerned you are everyone.Much more experienced I'd say. Yes, I have three PVS's. I did check them months ago and all was well. However, since then there's been a bit of work, i.e. valve job. It's actually quite simple to cap off the PVS's at the source and bring one at a time back on line for troubleshooting. It's just so stinking hot I haven't cared to do anything.

I'll get around to it early on the weekend mornings. I don't discount anything anymore. I've learned more than I ever, ever wanted to know about 70's technology emissions controls. We are going to be at 114* this weekend so working past 9 am is out.

That darn Cougar runs so nice that I'm amazed at how bad it ran before the valve job and I didn't have anything to compare it to.

Thanks for you help. I do appreciate it. It just a matter of getting off my butt early enough. Oh I did check the choke at 11 am yesterday and it was wide open after the car had sat for 5 hours. Closed in the morning at 5 am at 74*F. I think I'm OK with the choke. It takes about 90 secounds to open during warm up.

OBTW. I don't know how many turns out the idle screw is. I just turned it out until I had the highest vacuum reading (20) and turned it back in 1/4 turn. I did hear that todays fuels require it to be out further that back in the olden days of high octane leaded fuel. I don't know if that's true or not.

 

What's a PVS? I never had all the emission controls on either engine (V8 or this I6).

I try to keep my idle screw out by around 1.5 turns, with higher vacuum being the predicator.

 

Ported Vacuum Switch. You had sent me test procedures for them a few months ago. It's those vacuum switches with two or three vacuum ports that are screwed in to the water jacket. The temperature of the water makes them open or close.

 

Man, I must be losing it. My head is all wrapped around my renos. We got approved for the grant, but the details are getting put into drawings and wiring and plumbing codes, and, and, and...

 

Yanked the 283 and put in a 350 so lock this tread cause its dead.
Thanks for all the help on the old one but now I need some help on the new one. lol
Thanks
Bernie

 

Befuddled

I'm totally befuddled but not unhappy. Since I fixed the warning lights on the dash by replacing a blown fuse I haven't had any stalling problems at all. This is strange. I've driven the car two days this week with no problems.

 

Right on! Your's has some kind of feedback computer right? If the circuit is open, they don't know whether to crap or go blind. Glad to hear that you can see the lights!

 

Nope. No computer at all. I'm not going to question why I'm just going to accept life as it is today.