Holley 80670 problem
Holley 80670 problem So i took of my holley and installed efi. I sold the carb to my brother and he installed it with a new air gap intake on his sbc. (i know this is not a ls engine but i figured this would be the best place to post this) The problem is when it warms up it looses fuel pressure and smells so bad it makes his eyes water very bad. So i told him to look at his fuel system. He found a few bad areas and replaced them and also replaced the mec. fuel pump. He tries it agian and same proble. But now cold it has 7 psi and then when it starts to warm up it slowly drops fuel psi. and smells treible again. It runs ok and drives he said. The only thing that has ever ben done to the carb is jets, nozzel and power valve. Put new power valve in it when i sold it to him and the factory jets back in. It will die if you screw the idle mix all the way in so i am guessing the power valve is ok. Any ideas?
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From: Sparta, Mo. in southwest Missouri
So i took of my holley and installed efi. I sold the carb to my brother and he installed it with a new air gap intake on his sbc. (i know this is not a ls engine but i figured this would be the best place to post this) The problem is when it warms up it looses fuel pressure and smells so bad it makes his eyes water very bad. So i told him to look at his fuel system. He found a few bad areas and replaced them and also replaced the mec. fuel pump. He tries it agian and same proble. But now cold it has 7 psi and then when it starts to warm up it slowly drops fuel psi. and smells treible again. It runs ok and drives he said. The only thing that has ever ben done to the carb is jets, nozzel and power valve. Put new power valve in it when i sold it to him and the factory jets back in. It will die if you screw the idle mix all the way in so i am guessing the power valve is ok. Any ideas?
You are correct. My brother called holley and that is what he told him. He let it warm up and cooled gauge off with a cold towel and fuel pressure went to 7. I was thinking it is due to the oil getting hot and expanding and creating pressure in the gauge and that was the same as the fuel pressure so it read 0. If he made a tiny hole in the top i bet it would work right. I remember the instrucions saying to vent the pressure sometimes. He has a fuel log that has one inlet and splits to both bowls.
