My Jeep is a 1975 CJ5 with the 304 V8 and 3 speed manual transmission. I picked it up two years ago after my uncle passed away. I didn't run it much and it has been sitting in my garage for the last year and a half. When it last ran, it was very difficult/finicky to start but seemed to run ok once it had a chance to warm up (although it got around 11 MPG). The CJ was originally in the Las Vegas area, and I know my Uncle was always fighting to get it to pass their local smog check. He had it in and out of a few different shops, and had a local handyman come to the house a few times to wrench on it.
It came to me with a Holley 4412-3 carb installed. I tried last weekend to get it to start, got it to catch once or twice, but the best I could manage was a few sickly five second runs that died off when I attempted to give it gas. I took the carb off thinking it might be gummed from sitting, but it was quite clean inside.
After doing some research online I found out that the 4412's 500 CFM carb was overkill. When I pulled the spark plugs they appeared black and sooty, indicating that the carb had been running to rich. I'm not looking for huge power at wide open throttle; I'd much rather have a decent starting and reliable carb that will give me a little better mileage when running around town. As such, I picked up a Holley 7448 350 CFM carb that seems more applicable for what I want.
It looks like all the DEQ equipment has been pulled at some point, and with the aftermarket carb installed I obviously am not dealing with a stock vehicle. As you can see at some point in the vehicles life the EGR has been capped off.
I installed the Holley 7448 carb today and per Holley's instructions I turned the idle mixture screw clockwise until it bottomed out, and then backed them out one-and-a-half turns on both sides. I then hooked up the hose running from the PCV valve on the engine to the back of the carb, and ran the vacuum hose from the distributor to the "TIMED SPARK VACUUM PORT" on the side of the carburetor. Finally, I utilized the choke actuation lever to slightly open the choke plate as shown:
When I attempted to start it today, it took three 5-10 second cranks before fuel made it through the line from the mechanical fuel pump (and through an inline filter) and into the carb. On the fourth attempt the engine caught, turned over, and ran for a few seconds before dieing. I hopped out and looked under the hood and saw gas bubbling out of the carb's fuel bowl vent.
I let it sit for a few minutes, and attempted to start a second time. The second time the engine did not start, but my carb sure did spew gasoline out the fuel bowl vent at an alarming rate.
Per Holley's instructions I need to have the engine running to adjust the fuel level adjusting nut until the gasoline is just below the bottom of the fuel level sight plug in the float bowl body. Similarly, all vacuum readings are made with a running motor.
Since I can't even get the engine running, and I believe I installed/setup the carb correctly for this application I'm not sure where to go next. I don't have much experience with turning wrenches, so I spent most of the afternoon googling about Holley carbs and vacuum issues with 304's and now I'm stuck.