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#31
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Christy,
The cold vs warm behavior is affected by the choke. The flaps are somewhat closed (or are supposed to be) when the engine is cold. I've been trying to remember the details of zeniths and automatics (not having an automatic at the moment). If I recall rightly, putting the car in gear changes the vacuum levels. The dashpot on the rear carb should then kick in a bit? (I don't recall). When in doubt, experiment. You said that the gap between the dashpot screw and the lever arm is "just a hair". Do you trust Sam? With the emergency brake ON, have her put the car in gear while you look at the dash pot. Does it move? If so, which way? If somebody else out there with a similar setup can confirm this, that would help. Also, how balanced is the RPM drop from each carb when you block the idle air bore? -CTH |
#32
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You might be able to adjust the idle in gear by turning the bolt on the diaphragm ccw to see if that will give it a higher idle speed.
You may also have some problems with the cold idle. There is a section in the manual on adjustment/operation. There are also a bunch of posts on this forum on how to "burp" the power steering which might help. Great work on getting the car going! It's been a long HARD fight. Chuck |
#33
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The POWERLESSmobile...
Hi!
Thanks for the super-speedy reply CTH!! Ok...My son and I took a big ride in the car today...problems, problems, problems... I've quickly learned that I can NOT go up or down hills. So...we only cruised on flat surfaces. We drove down the street and stopped and REVERSED it into a flat driveway and drove back the other direction. The car does WONDERFULLY in reverse! (?) So....we went down a very little slope to a church parking lot, did a WIDE U-turn and cruised happily up the slope. I quickly found out that the car will not go very fast....maybe 15 mph MAX!!!??? AND when we got back to our house and started up the STEEP driveway, it stalled everytime. I had the gas floored and was crawling .001 mph up the hill and BARELY made it!! Why in the world is this car SOOOOOOOO powerless???? What kind of adjustment could help that??? I think the car goes faster in reverse!!! Help!!!!! ~Christy |
#34
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Oh yeah..Chuck!
Chuck! You totally reminded me of something I did and maybe this is why the car is behaving so badly!!
On the rear carb, on that vacuum device, I started turning the nuts on it like a madwoman. I thought the end of that was the dashPOT...I wanted to make it closer to the linkage, right?? Well, I also had turned the big NUT closer to the 'shroom CCW. It didn't seem to affect idle at all but could this be why the car was driving sooooooo slowly?????? I'll go out and try to turn it back a few turns and see if it matters. Btw...I am a weirdo! I can't find that Zenith carb manual to save my life. I can't find my book...I am TOTALLY winging tihs!! ~Christy |
#35
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wimpy performance
Christy,
You can rev the engine while in park, but in drive, the car doesn't want to go anyplace, but it's better in reverse? And the emergency brake wasn't on the whole way? Try going for a spin with the transmission in one of the lower gears and not plain old drive. Reverse is a very low gear, in fact, the lowest gear ratio available in that transmission. You might be stuck in 2nd, which means a vacuum problem going to the transmission (not serious). -CTH |
#36
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pen test results...
The test results were negative...
When I blocked the front carb, the idle dropped to around 400 rpms...the rear carb=death. *sigh* PLUS..my dashPOT didn't move....as CTH recalls, it is the one part that I said rattled when I was doing my carb rebuild. I don't think it comes apart. AND I don't think it works....maybe I need an ENTIRE rear carb???? ~Christy |
#37
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Just a dashpot for your birthday (a present from the crackpot?).
The pen test means that your carbs aren't as well balanced as you think. a 400 rpm drop? 1. make sure that the dashpot isn't pushing down on the rear throttle. 2. Adjust as before, keep your eyes on that dashpot. Keep backing it off if you have to. Your target idle while balanced is 800 RPM, not 1200. Make sure both choke flaps point straight up (fully open) while doing this. -CTH |
#38
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OK..
The car seems to ride so much better in 2 than in 4. It seems to shift really late in 4. The car will stall upon SUDDEN acceleration. It will NOT stall if I slowly ease the gas on. When it does stall it sounds like a backfire through the carb...which one? I don't know! I drove it in 4 back up the street and punched it...it WILL shift, but still lacks the necessary power to drive it in the real world. I went around 30 mph at the fastest. It seems that sudden acceleration in 2 when we're already moving is great...it picks up like it should. BUT from a stop, it will stall everytime. Any thoughts?? ~Christy btw..I turned that mushroom nut back where it was before. I don't know if it helped or not. The car definately did better this time speed-wise, but stall wise it was bad. |
#39
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in response CTH..
The dashPOT doesn't move!
I have it set very close but not even touching the throttle linkage. Both carbs are at 800-900 rpms....at full temp...and yes it did drop TO 400 rpms....so... I don't even know what to do next! ~Christy |
#40
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Christy,
The next thing to do is enjoy the rest of Sunday. Perhaps just bounce a lot or something equally exhausting for hours. Tomorrow, you can work on finding a new dashpot. -CTH PS. For the rest of you, Christy's husband Paul just got a trampoline. He sure knows how to get it up (and down, and up, and down ...). |
#41
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Great Advice!
You know I like to bounce!!! hee hee!!!
So...that is that, huh? I NEED a new dashpot?? I have yet to find a junk yard anywhere near my house that has a car like mine in it. So....who's going to be my (dash) POT connection??? :p ~Christy |
#42
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Geez!
Ok...I started looking in the Yellow Pages for some junk yards etc. What I've realized is that I need to find one of these dashPOTs in the US and have it shipped to me. (Although it'd be nice to just be able to GO and get one.)
Why are none of these places open on Sunday?? You'd think there'd be at least ONE place open on Sunday. I'm sure I'm not the only impatient person in the world....AND I think the Sunday business would be booming since people work on cars on the weekend! Sorry to complain!! ~Christy |
#43
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automotive recycling centers make their money from the mechanics ordering parts, not the casual customer. They stay open the same hours as the dealerships and other mechanics (8-5 weekdays & maybe 8-12 saturday).
The only way to conclusively prove the dashpot is DOA, is to get a hand vacuum pump and see if you can use it to sustain a vacuum in the dashpot. Mouth action isn't good enough for that. -CTH |
#44
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I have a spare dashpot - condition unknown. I am going out of town VERY early tomorrow, but I can check it out on Wednesday. Let me know if you still need one.
Chuck |
#45
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Yup, she needs one
Christy,
Word from a fellow on the vets list confirmed a few things for me. If your rubber is keeping the vent valve closed, that's an oops. It's better to remove the valve entirely rather than close it all the time. You can't cheat on the balance of the carbs and you'll have to start messing with the idle mixture screws. I can't tell you at the moment, how the carbs or the idle will react to a quarter turn of a single screw. The result isn't as obvious as an adjustment of the linkage. Lastly, replace the dashpot with one that you can test (or at least has been tested) with a hand held vacuum pump. -CTH |
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