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What if your 280z was running great then started sputtering and backfiring through afm now will hardly idle could it be fuel pump or is it more likely the afm?
Wiki User
∙ 11y ago
i just went through my sons 77 280z and replaced the fuel pump and i checked fuel pressure and it ran for a minute and started sputtering and shuts off the pressure dropped to 15 psi and i started and it took off did the same thing so i dropped the fuel tank and drained out the gas and let it dry out and got some gas in a 5 gallon gas jug and stuck the hose and started it ran good with good pressure so i went and ran 130psi out of my tank and puff the dust flew out so i went and put the tank back in after i shot air into it few times and it runs with good pressure so now is the idle it is to high so i hope this helps.
Wiki User
∙ 11y ago
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