GabeDiaZ27 Posted November 30, 2015 Share Posted November 30, 2015 OK so I just got done putting my 4 barrel conversion all onto my car piece by piece, nothing crazy just a Holley 390 cfm carb on a arizona-z-car intake manifold. I used a self regulating K&N fuel pump to the carb. all the wiring is done and everything is in order but my car still wont start. If I spray carb cleaner into my carb my car will fire right up then die out shortly after (2-3 seconds). What could it be? I am getting fuel for sure at least all the way up to the carb that is. The carb was a used one off someone else`s RUNNING 280z but he did say it sat for awhile before I had bought it. With the way it acts if I spray carb cleaner in it I would think its a fuel problem but being relatively new to carbs I don't want to mess it up trying to tune something I know nothing about. If anyone could help me out that would be great because im 9 months into this project and its finally time to drive it and I cant wait! I appreciate any help at all, Thanks! -Gabe Quote Link to comment Share on other sites More sharing options...
NewZed Posted November 30, 2015 Share Posted November 30, 2015 Did you look in the little hole for fuel? http://documents.holley.com/199r8108-2rev4.pdf https://www.holley.com/products/fuel_systems/carburetors/classic_holley/parts/0-8007 Quote Link to comment Share on other sites More sharing options...
Miles Posted November 30, 2015 Share Posted November 30, 2015 Did you look in the little hole for fuel? http://documents.holley.com/199r8108-2rev4.pdf https://www.holley.com/products/fuel_systems/carburetors/classic_holley/parts/0-8007 fuel level site plug fig. 4. Quote Link to comment Share on other sites More sharing options...
GabeDiaZ27 Posted December 1, 2015 Author Share Posted December 1, 2015 I checked both of the fuel level sight plug hole things and one was a little high and I managed to lower it to the correct amount but the other one (the one closest to the fuel port) had no visible fuel in it and I tried to raise it but that didn't seem to work. So I guess there is a clog or something in the carb? Quote Link to comment Share on other sites More sharing options...
Miles Posted December 1, 2015 Share Posted December 1, 2015 Hmmm. One bowel has fuel and the other bowel doesn't. I believe you have the answer. Quote Link to comment Share on other sites More sharing options...
GabeDiaZ27 Posted December 2, 2015 Author Share Posted December 2, 2015 I FOUND THE ISSUE!!!! the needle and seat for the primary was stuck shut! I broke it loose and broke it in general but I put it back together and it fired right up, but also shot some fuel out the top because it is broken. So I just need a new needle and seat. Thanks Miles and NewZed for the help and the links to help me find what was causing the issue! Quote Link to comment Share on other sites More sharing options...
BoonZ Posted December 3, 2015 Share Posted December 3, 2015 Holley has a accelerator pump diaphragm on the bottom of the float bowl. I find these get hard if not used. When you start using them after a long time out of service they crack and leak the fuel in the bowl down on your exaust. Quote Link to comment Share on other sites More sharing options...
Miles Posted December 3, 2015 Share Posted December 3, 2015 (edited) Holley has a accelerator pump diaphragm on the bottom of the float bowl. I find these get hard if not used. When you start using them after a long time out of service they crack and leak the fuel in the bowl down on your exaust. Edited December 3, 2015 by Miles Quote Link to comment Share on other sites More sharing options...
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