I just put in a rebuilt Chevy 327 with fuelie heads in my 64' Chevy C-10. The carb is an old four barrel holly I had, dist is not an HEI,******* headers. The truck ran fine for a day or two; I was running with open header for the first couple days, until I put Cherry bombs on. Had to set timing a little advance 34 degrees. The guy I bought the motor from didn't remember what kind of cam, but it’s lumpy. Problem: after the truck warms up a bit, 15-20mins, starts to hesitate and cut out. Shut it down for a moment or two then start back up it will drive ok then act up again. Thought maybe a ground, but found nothing. Fuel? Vapor lock? Timing? Where do I start? Thanks for the help! Oh the trans is a TH 350
check to see if their is the antiheat gel between the module and distributor plate. my best guess. if it's missing it will not run for long. also on an hei,you need a heavier hotwire to the dist. if you use the stock wire,it will heat up the module.
I would guess fuel. I am****uming it's a stock gas tank. I would start by looking in your float bowl for trash and I would install a filter between your pump and carb.
It could be that the coil is breaking down when it gets hot. One more thing to check is make sure that the holder for the condenser is tight and that the condenser is tight in the holder. Also is the choke working right in that is it opening up right when the engine warms up? It might be sticking especially if the carb sat for a while without running. Check the little things as it is probably something like that causing the problem. <input id="gwProxy" type="hidden"><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden">
Ok, not the coil, I put a new coil on and it did the same thing. Condenser tight, no choke on the carb, dont ask, next will be fuel filter and line, then carb itself. Thanks for the tips.
Had the same problem in a 34. Sending unit had a sock type filter on it. Car ran fine till the junk in the tank plugged the sock then car would run rough & die. Let it sit & the junk would fall back in the tank filter cleared & car would run fine till it plugged up again. This was all caused by 1 tank of bad gas that had trash in it!
Ok, rebuilt the carb, new fuel pump, there is no in line filter, I put a new filter from the pump to the carb. It runs good until the temp gets to about 190, then hesitates and dies. Once it cools it will fire up agian. Vapor lock? Starter getting hot? What next!
how close did you run your fuel line to the exhaust? Could be to close and causing vapor lock there. Could also be a timing issue.
Hmmmmmm......What distributor are you running .....I ve got another crazy idea Voltage regulator .Sounds like a drain on your battery ,I wish you luck......
It's the little things like this that get you down. I would check into the ignition a little more. Sounds like it could be a timing problem. What distributor? I'm guessing one with vac. advance? Steven.
do you have a ballast resistor? next time the engine cuts out, feel the coil, it should be uncomfortably warm but not too hot to touch
I would pull the line off the fuel pump that goes to the tank and run a line into a clean jug of gas. Run it that way if it runs the same you have eliminated the fuel tank and pickup as a suspect. I have fought with***** in the tank many times.
Thanks guys! What is a ballast resistor? The distributor is not an HEI It has a vac. advance. New coil. I will double check the condenser. the fuel line from the pump to the carb is resting on the water pump. The carb is a Holly with two fuel ports, the line going to the carb is on the hose from the heater core. I will try the trick with the clean gas can. Again thanks for the tips....this makes me nuts!
You know what drives me nuts? A little steering wheel on the end of me*****. When we run points, ignition problems are always the condensor or system voltage. But it never hurts to clean and re-set the points either
......a miniscule crack in a head or block that opens up only when the motor gets warm, will do that. If all else fails, put in some water glass. Might do the trick.
Porcelain object with two wires attached...look at lowkats pic above...that's one...and one wire is hooked to the coil...a resistor can get hot and crack...if broken it can cause the engine to run like you say yours is... Your fuel line is attached to the heater hose...??? If it's on the warm side of the heater connection, then your fuel is getting warm since the water going to the heater is heating up at 190 degrees, that'll cause vapor lock...simply move it... R-
Shit the bed...I hope its not a cracked head or block. The motor is a good rebuild. I will look into the condenser running clean gas from a jug and moving the fuel lines. How do I post pics with this thread?
I would bet***** in the tank. Been this same route with my own Chevy truck. Clean tank and new fuel pickup cured problem.
fuel line looks fine.i would put the fuelfilter inline below the car and hard line from pump though.just my opp.have you checked your fueltank yet?
Got the fuel line away from the heat, put a spacer between manifold and carb. Check the points and condenser all good there. Still doing the same. Next put in new fuel line from the tank to the pump. Am I missing anything? Im so agitated.<O</O
Did you try running gas from somewhere other then the tank as was suggested? I say pull your sending unit & see if it has a filter on it in the tank.A new line from the tank to the pump won't do any good if the problem is in the tank.
How about the screens in the carb Under the fittings that hold the dual feed......Forget that one ..Is this at idle or are you driving ..I've think i've gotten to the bottom of your problem,Do you have plastic floats in your holley,Change to Brass I bet you are flooding out ,I've also had problems with the rear metering valve .I would be driving and just stahl After a few minutes It would fire up again and a few seconds later would stall .After that I install brass floats in every carb ...I bet you that is your problem .Next time you get it running After it stalls read your plugs.Sounds like your problem.......
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