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Fuel pressure is good, steady 6lbs. It's a new fuel pump too since the gas tank was changed out. I'll check the needled and seats. I did check the float height after the rebuild and it was set at the recommended slight trickle on my level garage floor. Thanks.

I have a 1974 Swinger with a 360 bored .030" and a Edlebrock intake. I have a Holley 750DP that I've rebuilt twice now. The first time, I screwed around with the setup and installed a power valve on the secondaries and opened the secondary idle a little. It ran way too rich and idled poorly. I...

Finally got some time to warm it up and check the timing and vacuum. It's all good, sitting at 20 degrees @ 800 rpm pulling 15 inches nice and steady. No vacuum leaks, the engine is happy with that timing, no pinging under load and idles well. I'm pointing to the carb. It's a hand me down from...

Sorry for not responding. You are all on the right track, something slipped/opened up. I haven't been able to really look at it much here, cold, snowing, lazy. I did pull the plugs and they are black, I've been checking them all summer since we rebuilt the engine last winter. They've been nice...

We drove the car to the last car show of the year and when we got there it was idling ~about 3000 RPM. It's been fine all summer and I haven't touched it. I have to back off the throttle cable adjustment almost a half inch to settle it down to normal. How on earth did I lose almost a half inch...

I went through it all again tonight. Warmed it up and checked timing (14 degrees at idle), vacuum (14inches at idle), looked for fuel dribbling (none), accelerator pump shot (nice clean spray of fuel), no vacuum leaks, no shorts that I could see. No hesitation or stalling when I was hitting the...

I can't set the fuel pressure on a mechanical pump, but I really don't think it has anything to do with fuel pressure. Remember it only stalls when I wack the gas. If I go easy on it, and slowly press it to the floor the secondary's open up and away she goes. If there was any kind of fuel...

That's a new one for me. What exactly would be shorting when the engine torques over? How would I test for that?

I'll check that but the whole fuel system is new from that tank to the engine. Changing a fuel filter is easy though.

You mean the pump diaphragm on the carb right? I have a new fuel pump and no vacuum leaks, it sits at 14inches at idle with my vacuum guage. Fuel pressure is good, sits at around 5.5psi.

Thanks, further information. When we rebuilt the engine this winter we put in a new tank, sending unit, fuel pump, etc. It's always had a full tank since then, I don't believe there is any water in the system. The car live in a heated garage.

1974 Dodge Dart Swinger with a fresh 360 LA, Holley 750DP, Edlebrock intake, stock ignition. So on Saturday, I went for a boot on the back roads and had a great time doing burnouts at every intersection. The car was responsive and doing exactly what I wanted it to. I had a blast. On Sunday my...

Can't get Carter up here in Calgary at my local auto parts store, called them and they have a Spectra. I have good luck with their fuel tank and sending unit made here in Canada so I'll try their fuel pump too.

My 1974 Dodge Dart was originally a /6, now it's a 360LA. The PO reused a lot of parts and I'm wondering if my secondary stumble is caused by lack of gas from the mechanical pump. Is it possible the PO used the pump from the /6 with the stock 2 bbl carb and it's unable to feed the AFB 4 bbl...

Not to hijack this thread, but I noticed that no one has suggested using the free AFB carb. Is it a dog? I have a Carter AFB on my 74 Dart and I think it's holding the engine back. I haven't rebuilt it, but here's some of the issues I'm having with it. Fuel bowls empty after sitting for a...

what 67Dart273 said. I just finished doing that exact set of steps and my Dart is running just fine. Took my dog for a boot, thoroughly fun.