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| Black stuff on ground after starting car!! https://www.slantsix.org/forum/viewtopic.php?t=25246 |
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| Author: | A. Lewis [ Sun Oct 07, 2007 1:03 am ] |
| Post subject: | Black stuff on ground after starting car!! |
Hey you guys, Lately I have been seeing black spots on the ground after I start my car and the inside of my tailpipe is all sooty and black. I'm getting tired of cleaning my driveway every other day. Does anyone no what this is? I think running way too rich. If so, what is the best way to tune the holley 1920? I have a tach, vacuum gauge, and most likely what ever else is needed to tune a car with the exception of an exhaust gas analyzer ( $$$). Thanks for your help! -Angelo |
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| Author: | sethmcneil [ Sun Oct 07, 2007 4:02 am ] |
| Post subject: | |
I only does it in the morning, when she runs for a few minuets on choke... Right? |
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| Author: | knuckledown [ Sun Oct 07, 2007 4:09 am ] |
| Post subject: | |
Mine does that as well. I park on blacktop, so it's not as much of a worry for me. I figured it was just in the morning when the choke is on and the engine is running rich. I've never had that problem later in the day. |
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| Author: | SlantSixDan [ Sun Oct 07, 2007 5:41 am ] |
| Post subject: | |
This suggests the choke thermostat and/or choke pull-off need to be adjusted. What year and model is the car? |
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| Author: | A. Lewis [ Sun Oct 07, 2007 3:06 pm ] |
| Post subject: | |
Its a 72 swinger with the 225 and 1920 carb. |
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| Author: | Aggressive Ted [ Sun Oct 07, 2007 3:35 pm ] |
| Post subject: | |
I have the same set up. I just put more bend in the choke rod to make it shorter so it doesn't stay on so long. When you get that much black soot it is over choked. I bent the rod so it is like a "S" or "Z" almost 90 degree bends. After a few times adjusting it, I got just right. It has been running fine for about a year now, no more black soot. It is a simple fix. |
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| Author: | SlantSixDan [ Sun Oct 07, 2007 3:56 pm ] |
| Post subject: | |
Bending rods not meant to be bent — such as the choke thermostat pushrod — is a brute-force/hamfist approach. The choke thermostat is adjustable via the locknut on the side - you have to remove the thermostat from the manifold in order to adjust it. The choke pull-off is adjusted by altering the width of the legs of the "U" bend in the pull-off link. But before we adjust anything, have you got the correct thick carb base gasket installed? |
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| Author: | sandy in BC [ Sun Oct 07, 2007 4:08 pm ] |
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I LOVE hamfist and sweet potatoes! |
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| Author: | A. Lewis [ Sun Oct 07, 2007 7:46 pm ] |
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Im pretty sure its the thick one. |
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| Author: | A. Lewis [ Sun Oct 07, 2007 7:46 pm ] |
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Im pretty sure its the thick one. How thick should it be? |
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| Author: | SlantSixDan [ Sun Oct 07, 2007 8:01 pm ] |
| Post subject: | |
About 5/16" thick. Unless yours is a super low-miles unit, you may find it difficult to get a good adjustment on your choke. I don't spend much time messing with these any more...I just toss the old type unit and put on one of the Electric choke kits. |
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