Help! I'm Stumped!!
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Help! I'm Stumped!!
Here is the problem. My bronco, would idle all day, but the second you step on the gas, it would die. Ok, a new fuel pump later, added an electric at the tank, & a new carb, it is STILL doing it! 
Been thinking a long time on this.... There was (keyword, was) a vacumm line hooked up to the gas tank. I disconnected this, thinking it wasn't needed. Well, I disconnected it at the tank, so it is not an easy thing to hook back up. (have to drop the tank)
Could this even remotely be the problem?
Been thinking a long time on this.... There was (keyword, was) a vacumm line hooked up to the gas tank. I disconnected this, thinking it wasn't needed. Well, I disconnected it at the tank, so it is not an easy thing to hook back up. (have to drop the tank)
Could this even remotely be the problem?
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I have done some more research into the problem, and noticed that when I work the throttle, I am NOT getting gas out of the squirters, like I should. I am thinking that the accelerator pump is bad... Would a bad accelerator pump cause this condition? I am thinking so, but I am not a carb. guy...
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From: Houston
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Joined: Jul 2002
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From: Bend,OR
hollys tend to crap out easily because of the accelerator pump. i would rebuild the carb. also make sure your float is working properly
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From: Austin USA
If you move the throttle and there is no gas squirting then yes, that can do it. When the butterfly plates open it is allowing more air in and not enough gas. You should have a nice squirt when you move the throttle.
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From: Fredericton NB, Canada
You said the carb is new, so lets set that aside a moment.
Firstly, hook up a gauge between the fuel pump and carb and make sure you are getting the proper fuel pressure. Since you replaced the mechanical gauge with an electric one make sure you are still within the 4-7 psi range.
Secondly, depending on the distributor, check your ported vacuum. It runs from a canister on the side of the distributer to the base of the carb. Bad ones often result in a "bogging" on acceleration.
Thirdly, check your valve timing. Even though your spark timing may be alright, your timing chain could be a tad stretched so they arent opening at the proper time. Mine is like that. I can idle it all day, but it runs like crap and bogs on acceleration. Chain rattles on idle, and is loose. Im about to change it myself.
Finally, if all others check out, open up the carb and check the accelerator pump, and the secondary spring. A new accelerator pump can be bought for only a few dollars. If your secondaries are opening at the improper time, you can buy a lighter one for cheap as well.
Hope this helps.
-Matt
Firstly, hook up a gauge between the fuel pump and carb and make sure you are getting the proper fuel pressure. Since you replaced the mechanical gauge with an electric one make sure you are still within the 4-7 psi range.
Secondly, depending on the distributor, check your ported vacuum. It runs from a canister on the side of the distributer to the base of the carb. Bad ones often result in a "bogging" on acceleration.
Thirdly, check your valve timing. Even though your spark timing may be alright, your timing chain could be a tad stretched so they arent opening at the proper time. Mine is like that. I can idle it all day, but it runs like crap and bogs on acceleration. Chain rattles on idle, and is loose. Im about to change it myself.
Finally, if all others check out, open up the carb and check the accelerator pump, and the secondary spring. A new accelerator pump can be bought for only a few dollars. If your secondaries are opening at the improper time, you can buy a lighter one for cheap as well.
Hope this helps.
-Matt
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Well guys, thanks for all of your tips. I finally found the problem! The fuel line was kinked at the fuel pump, on the tank side! I seen that, shortened up the line, hooked it back up, and she fired right up, with no problems!
Thanks again.......
Earl
Thanks again.......
Earl