So at the end of last summer my 68 starting dying out on me. It'll start and run as long as I hold the throttle open but the second I close it, it stalls out. No sputtering or anything just dies instantly. I'm at a loss here. I've tried adjusting the floats, checked the distributor, plugs wires, and the carb seems to be pumping fuel just fine. It's a Holley 4 barrel carb and I am out of ideas, any tips or suggestions will be appreciated. Thank you!
Issues Need Help!!
- Thread starter Cclark29
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horse sence
15 Year Member
See if it has the bronze filter inside the inlet on the bowl ,The large nut unscrews,it is inside that and they plug up easily .Depends on what Holley it is
zookeeper
Founding Member
My guess is either your floats have filled with gas or the needle is stuck. The fact that you have to hold the throttle open suggests it's getting too much fuel. Check for dirt or damage on the tip of the float needle, then shake the float lightly and listen for liquid inside. If it passes on both of those tests, check the accelerator pump. Also, don't forget the secondary side of the carb, it's just as likely to pick up trash that'll cause you grief.
zookeeper
Founding Member
Right after I posted my answer, I also forgot to mention, don't assumed it's a carb problem, look at vacuum leaks in odd places. Hard to see areas like the vacuum modulator on the trans (both ends of the hard line) the PCV valve (both ends) look to make sure all of the vacuum plugs are in place on the carb, check the vacuum advance canister on the distributer and even the intake manifold itself. These are all places I've had vacuum leaks that are a pain to find.
65Ccoderagtop
Member
I will have to check my own vacuum modulator. Thanks Zookeeper! I am putting a manual choke back on the 65 with a Holley 2v.
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