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| Choke flap https://slantsix.org/forum/viewtopic.php?t=57820 |
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| Author: | kielbasa [ Fri Jun 05, 2015 10:33 am ] |
| Post subject: | Choke flap |
On my 225 I rebuilt a holley 1920. It's list number says it's from 1963. This is on my 65 valiant. I noticed when car is warm and during idle. Choke flap is completely vertical. It has some free slop to close it and actually runs better and rpms raise a bit. If I go passed the free play and pull against the vacuum piston it runs even a hair better. Is there some sort of adjustment. Or is there another problem I'm overlooking. Thanks |
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| Author: | Reed [ Fri Jun 05, 2015 10:52 am ] |
| Post subject: | |
Are you saying that the engine runs better when hot if you close the choke? If so, then you either (a) have a vacuum leak or (b) are running lean for some other reason. Try adjusting the curb idle mixture. |
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| Author: | kielbasa [ Fri Jun 05, 2015 11:10 am ] |
| Post subject: | |
No intake leak that I can find. Mixture screw is set with vacuum gauge. Could a bad pcv valve cause this? It seems mine might be defective. I have a new one on order. Of course it's a 65 so needs the whacky pcv valve. |
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| Author: | SlantSixDan [ Sun Jun 07, 2015 10:31 am ] |
| Post subject: | |
If you can partially close the choke and have the engine run better, the carburetor's running lean. A faulty (stuck open) or incorrect PCV valve could cause this, though I suspect you've got problems internal to the carb. You don't need a wacky PCV valve; a regular plastic Chrysler item will do fine. See here. |
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| Author: | kielbasa [ Sun Jun 07, 2015 7:12 pm ] |
| Post subject: | |
I already have the whacky pcv on order. Suppose to arrive tomorrow. I believe I got something funky going on with the pcv currently. If I remove it. Sometime idle will drop sometimes it stays the same. You can watch the ball vibrate inside then drop. And then get sucked back in. It's very erratic. And I belive it to be the cause of my idle issues as well. We will see. |
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| Author: | kielbasa [ Mon Jun 08, 2015 12:12 pm ] |
| Post subject: | |
So the pcv seemed to help. Idles smoother, using a vacuum gauge I can tell needle is steadier (still has the slightest jiggle) and used it to play with mixture screw, which I was able to close by about a full turn in. Idle is at 825ish in park, didn't check in gear but I'll assume close to 750rpm. Idling in gear it runs a little shakey. Timing is 6 degrees. I need to hit a hill and see if I get any ping. If not I'll turn it up a couple degrees and try again and reset idle and mixture. With valve lash I have them set fairly loose. The cam card called for .012 and .014 lash (Oregon cams 125) but when set that tight I vacuum was lower and more erratic. Also I had problems dieseling. I believe they are set around .020 .022. I have not played with valve lash since new carb and pcv valve yet though. This is a daily driver for work and school so I have to pick and choose when to work in depth wisely. |
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| Author: | kielbasa [ Mon Jun 08, 2015 2:13 pm ] |
| Post subject: | |
So it still pings at 6 degrees which is odd since I remember I did the advance chart and think I remember I should have been safe around 10 degrees. Maybe I just need to limit the total advance |
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