Bootybandit Posted May 27 Share Posted May 27 Holley 4160 (which I now HATE). I rebuilt this because the accelerator pump was leaking and it sat for 5 years. Pump still leaks, I looked at the pump and the cover seemed to be a little warped. I determined this by setting it on a flat surface and it looks slightly bowed between the screw holes in the middle. I also noticed the pump diaphragm appeared really Poopy and is splitting SO.... I'm ordering a new Blue diaphragm and will use rtv. Is this a good idea? And... Could a leaky accelerator pump cause a rolling idle? I also plugged all the vac ports and still got a rolling idle. I need help or Im going to pull it of and beat it beyond repair and order an Edlebrock like my brother told me to do years ago. Link to comment Share on other sites More sharing options...
Gary Lewis Posted May 27 Share Posted May 27 I'm not a fan of Holley carbs either, so I understand your frustration. But I have taken a file to the cover of the accelerator pump to make it flat. However, I don't think you want to use RTV on a carb. It hasn't worked for me and I don't think it will for you. I'd get the cover flat and hope it'll seal against the new diaphragm. Speaking of the diaphragm, could I get you to edit your post to change your comment about it? We try to keep this forum family friendly, and that isn't. As for the rolling idle, I think that is usually due to a very lean condition - so lean the engine almost dies but then comes back. And I don't think the accelerator pump will do that. But, I'll tag Bill, who used to run an ignition and carb shop, and I'll be he will know. Link to comment Share on other sites More sharing options...
Bootybandit Posted May 28 Author Share Posted May 28 I'm not a fan of Holley carbs either, so I understand your frustration. But I have taken a file to the cover of the accelerator pump to make it flat. However, I don't think you want to use RTV on a carb. It hasn't worked for me and I don't think it will for you. I'd get the cover flat and hope it'll seal against the new diaphragm. Speaking of the diaphragm, could I get you to edit your post to change your comment about it? We try to keep this forum family friendly, and that isn't. As for the rolling idle, I think that is usually due to a very lean condition - so lean the engine almost dies but then comes back. And I don't think the accelerator pump will do that. But, I'll tag Bill, who used to run an ignition and carb shop, and I'll be he will know. Many thanks, I cleaned up my potty post I knew better. Tomorrow I'll pull it again and shave it down in the mean time I'm shopping around for a 4106 I can rebuild. Ebay has one for 125, used. Have any thoughts on buying used? Link to comment Share on other sites More sharing options...
85lebaront2 Posted May 28 Share Posted May 28 I used to put Holley pump covers on a large vice and use a big hammer on them to get them flat. On the rolling idle, with the engine running try closing off most of the air horn (choke portion) with your hand, if the idle smooths out and seems steadier, you are too lean, so open the idle mixture some more. If it gets worse, then you are too rich and it may be a bad power valve (the main reason Gary doesn't like them). Link to comment Share on other sites More sharing options...
mat in tn Posted May 28 Share Posted May 28 I used to put Holley pump covers on a large vice and use a big hammer on them to get them flat. On the rolling idle, with the engine running try closing off most of the air horn (choke portion) with your hand, if the idle smooths out and seems steadier, you are too lean, so open the idle mixture some more. If it gets worse, then you are too rich and it may be a bad power valve (the main reason Gary doesn't like them). 2nd that. I was trying to imagine "rolling idle" and realized the falter and recover symptoms. very possible that its lean enough to "cycle" the power valve. typically, if it were a rich cond, it would not recover but load up and have a very rich exhaust. this when I would uncap a small vacuum line on the intake and see if it stalls or revs up. stall is lean. revs up is rich. 1/8" is about right size port to uncap. Link to comment Share on other sites More sharing options...
Gary Lewis Posted May 28 Share Posted May 28 Many thanks, I cleaned up my potty post I knew better. Tomorrow I'll pull it again and shave it down in the mean time I'm shopping around for a 4106 I can rebuild. Ebay has one for 125, used. Have any thoughts on buying used? The others explained about the rolling idle. As for the CarterEdelbrock, a 1406 is my favorite. And a good used one is fine. Easy to rebuild and no fabric holding fuel in to leak. I’m Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted May 28 Share Posted May 28 Many thanks, I cleaned up my potty post I knew better. Tomorrow I'll pull it again and shave it down in the mean time I'm shopping around for a 4106 I can rebuild. Ebay has one for 125, used. Have any thoughts on buying used? Holley's have a built in power valve check ball since 1991. Post the build date from the front of the air horn on the driver's side. Does it smoke like a chimney and want to stall at idle? Does it clear it's throat as you get on it? Does it burble and pop on trailing throttle??? They are good reliable carbs that are easy to tune if you know how. (Certainly FAR easier than an SU or something) My 0-08457-S worked fine, but I never overtightened the screws and always used the proper (blue) Teflon gaskets. I gave it to George Maroudas, down there in Louisiana, and he hasn't reported their Ranchero has any problems... If you crank the bolts you'll warp covers, bowls, base flange, and even the body. Bill will tell you. He ran a carburetor shop (Preston) for quite some time! I (think) I still have a 650 AVS sitting on the shelf in a barn, all wrapped up w/ a new accelerator pump installed. Gary can argue, but I think the air valve secondary is a better carb than the aluminum four barrel. 650 might be a bit much for a Windsor, depending on what you have in it. Link to comment Share on other sites More sharing options...
Gary Lewis Posted May 28 Share Posted May 28 Holley's have a built in power valve check ball since 1991. Post the build date from the front of the air horn on the driver's side. Does it smoke like a chimney and want to stall at idle? Does it clear it's throat as you get on it? Does it burble and pop on trailing throttle??? They are good reliable carbs that are easy to tune if you know how. (Certainly FAR easier than an SU or something) My 0-08457-S worked fine, but I never overtightened the screws and always used the proper (blue) Teflon gaskets. I gave it to George Maroudas, down there in Louisiana, and he hasn't reported their Ranchero has any problems... If you crank the bolts you'll warp covers, bowls, base flange, and even the body. Bill will tell you. He ran a carburetor shop (Preston) for quite some time! I (think) I still have a 650 AVS sitting on the shelf in a barn, all wrapped up w/ a new accelerator pump installed. Gary can argue, but I think the air valve secondary is a better carb than the aluminum four barrel. 650 might be a bit much for a Windsor, depending on what you have in it. No argument at all, the AVS is better than the AFB, and the 1406 is essentially an AFB. As for being a bit much, that's the beauty of the AVS - you can easily adjust the opening point of the air valve. So if it comes in too soon and the engine bogs just loosen the lock screw, tighten the adjustment screw a bit, tighten the lock screw, and now it won't. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted May 28 Share Posted May 28 No argument at all, the AVS is better than the AFB, and the 1406 is essentially an AFB. As for being a bit much, that's the beauty of the AVS - you can easily adjust the opening point of the air valve. So if it comes in too soon and the engine bogs just loosen the lock screw, tighten the adjustment screw a bit, tighten the lock screw, and now it won't. I know how it works! But I don't know if it still exists (along with all my other tools & stuff) I was really happy when George wanted the Holley for their last year Starsky & Hutch bordello-mobile. 😉 Link to comment Share on other sites More sharing options...
Gary Lewis Posted May 28 Share Posted May 28 I know how it works! But I don't know if it still exists (along with all my other tools & stuff) I was really happy when George wanted the Holley for their last year Starsky & Hutch bordello-mobile. 😉 The "how it works" wasn't for your benefit. Link to comment Share on other sites More sharing options...
Recommended Posts