Re: 77 Westy high rpm hesitation
Posted: Thu Jul 11, 2019 6:33 am
Not that I can speak toGreenWesty83 wrote: ↑Wed Jul 10, 2019 12:24 pmThanks for the heads up! Are there any other units that are known better quality?
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Not that I can speak toGreenWesty83 wrote: ↑Wed Jul 10, 2019 12:24 pmThanks for the heads up! Are there any other units that are known better quality?
There is nothing lazy about using points. There is devotion to the gestalt. I think you may be on to something in suggesting a brief run with points. I have had a couple of weird Pertronix symptoms with customers, including high-speed misfire.JPower6210 wrote: ↑Tue Jul 16, 2019 5:33 amHi- I am admittedly a neophyte at all of this- and you have the experts weighing in. I did however suffer some similar problems when I first got my bus. Got it all tuned up, bought a pertronix unit, installed and had some issues at the high end. As an experiment, I went back to points and the problem disappeared. I really like the Pertronix set up, and run it in a couple of other vehicles, but since the points fixed the issue for me, I have been lazy and stuck with the points for now. I will try the Pertronix again, but it's low on the list.
Just a thought....
JP
I did have the issue with points at first. When the issue initially appeared during a road trip points were installed. I then installed new Pertronix hoping that would address the issue. It did not. However I don’t believe I ever tried NEW points and condenser.JPower6210 wrote: ↑Tue Jul 16, 2019 5:33 amHi- I am admittedly a neophyte at all of this- and you have the experts weighing in. I did however suffer some similar problems when I first got my bus. Got it all tuned up, bought a pertronix unit, installed and had some issues at the high end. As an experiment, I went back to points and the problem disappeared. I really like the Pertronix set up, and run it in a couple of other vehicles, but since the points fixed the issue for me, I have been lazy and stuck with the points for now. I will try the Pertronix again, but it's low on the list.
Just a thought....
JP
GreenWesty83 wrote: ↑Tue Jul 30, 2019 6:46 amColin. I am curious as to how my engine would get this out of whack with the mixture. And as far as tuning goes. How often do I have to touch the AFM? And how do I test that it isn’t getting out of adjustment again?
Turned screw a bit which way? Which screw? Speed screw?GreenWesty83 wrote: ↑Mon Aug 05, 2019 3:10 pmNoticed that with idle adjusted down the next morning the engine had a hard time warming up. Sputtering a little. Turned screw a bit and it idled much better.
Idle speed and mixture must be adjusted warm only.GreenWesty83 wrote: ↑Mon Aug 05, 2019 3:10 pmWaited till engine was warm and brought idle back down again to the 1000rpm. Is this somewhat normal? Should I look at something else?
Yes. The Bypass screw to adjust idle speed. The idle was too low when engine was cold, so I turned it counterclockwise to increase the speed so it would idle better cold.Amskeptic wrote: ↑Mon Aug 12, 2019 9:42 pmTurned screw a bit which way? Which screw? Speed screw?GreenWesty83 wrote: ↑Mon Aug 05, 2019 3:10 pmNoticed that with idle adjusted down the next morning the engine had a hard time warming up. Sputtering a little. Turned screw a bit and it idled much better.
Yes, the mixture is richer now.Amskeptic wrote: ↑Mon Aug 12, 2019 9:42 pmIdle speed and mixture must be adjusted warm only.GreenWesty83 wrote: ↑Mon Aug 05, 2019 3:10 pmWaited till engine was warm and brought idle back down again to the 1000rpm. Is this somewhat normal? Should I look at something else?
We have richer mixture now, correct?
We did it all at the cog (black plastic gear teeth), yes?
You now have a pig-rich cold mixture that should only last about 6 minutes.
There is more we can do ...
Colin