The Ford Barn

51PanelMan · 10-14-2012, 01:39 PM

I got my truck back on the road after a full engine rebuild, but am now having problems with it running lean/rich and still backfiring slightly. The engine is a Ford 215 OHV 6 There's also blue/black smoke coming out of the tailpipe. I took it into a mechanic that's familiar with multiple set ups, but on V8s. He told me that the linkage that I have isn't progressive (linkage came with the kit) and that one carb is running more fuel than the other. Another thing he told me is that my set up doesn't have a hard stop to control the idle speed. He's unable to ajust/sync them, as well as set the timing.

I've seen a few other I6 dual carb set ups that had progressive linkage. Appears that I may need that type of linkage that I need. I had both carbs rebuilt, but still think they weren't done correctly. I don't think that they're jetted right to work together. Mine may be jetted too high.

This is my set up now.

I'm wondering if any one knows of someone who is more knowledgeable with multi-carb set ups that can take a look and tell me what's wrong. I'm in the Bay Area (California) and don't mind a little travel. Perhaps someone knows who can build me a progressive linkage or know where I can buy one? Also, where to obtain a hard stopper for the carbs? Lastly, maybe someone who's familiar with Holley 1904s and can go through my carbs again and get them done right to work as a pair.

I really want to keep the dual intake set up, so any help/guidance would be greatly appreciated. I'm anxious to get some answers because I need to get back to my mechanic on Monday or pull the truck until I get more answers. Thanks for the help.

10-14-2012, 01:39 PM	#1
51PanelMan Senior Member Join Date: May 2010 Location: San Jose, CA Posts: 212	Help with 215 OHV I6 2x1 set up I got my truck back on the road after a full engine rebuild, but am now having problems with it running lean/rich and still backfiring slightly. The engine is a Ford 215 OHV 6 There's also blue/black smoke coming out of the tailpipe. I took it into a mechanic that's familiar with multiple set ups, but on V8s. He told me that the linkage that I have isn't progressive (linkage came with the kit) and that one carb is running more fuel than the other. Another thing he told me is that my set up doesn't have a hard stop to control the idle speed. He's unable to ajust/sync them, as well as set the timing. I've seen a few other I6 dual carb set ups that had progressive linkage. Appears that I may need that type of linkage that I need. I had both carbs rebuilt, but still think they weren't done correctly. I don't think that they're jetted right to work together. Mine may be jetted too high. This is my set up now. I'm wondering if any one knows of someone who is more knowledgeable with multi-carb set ups that can take a look and tell me what's wrong. I'm in the Bay Area (California) and don't mind a little travel. Perhaps someone knows who can build me a progressive linkage or know where I can buy one? Also, where to obtain a hard stopper for the carbs? Lastly, maybe someone who's familiar with Holley 1904s and can go through my carbs again and get them done right to work as a pair. I really want to keep the dual intake set up, so any help/guidance would be greatly appreciated. I'm anxious to get some answers because I need to get back to my mechanic on Monday or pull the truck until I get more answers. Thanks for the help.