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SVTPerformance's Chain of Restaurants
Tuning À la carte
Fuel pressure gauge won't read over 40 psi
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<blockquote data-quote="TXEnginerd" data-source="post: 14220610" data-attributes="member: 113050"><p>I can't really offer any explanation as to why your gauge seems to be reading lower than you expect it to, but for what it's worth, my electric fuel pressure gauge attached at the schrader valve location always reads about 10psi higher than the mechanical gauge on my regulator of my return fuel system. And it definitely never reads the same as the fuel pressure drop across injectors PID because that is not measuring outright fuel pressure. It's the difference between fuel pressure and manifold pressure. Bottom line is I don't use the electric gauge as a tuning tool. I just have it for peace of mind since I can't read the mechanical gauge under the hood while driving. I think having your tuner double check the A/F is a good idea, but beyond that I wouldn't worry too much about what the actual value is on the gauge unless it goes to 0.</p></blockquote><p></p>
[QUOTE="TXEnginerd, post: 14220610, member: 113050"] I can't really offer any explanation as to why your gauge seems to be reading lower than you expect it to, but for what it's worth, my electric fuel pressure gauge attached at the schrader valve location always reads about 10psi higher than the mechanical gauge on my regulator of my return fuel system. And it definitely never reads the same as the fuel pressure drop across injectors PID because that is not measuring outright fuel pressure. It's the difference between fuel pressure and manifold pressure. Bottom line is I don't use the electric gauge as a tuning tool. I just have it for peace of mind since I can't read the mechanical gauge under the hood while driving. I think having your tuner double check the A/F is a good idea, but beyond that I wouldn't worry too much about what the actual value is on the gauge unless it goes to 0. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
Fuel pressure gauge won't read over 40 psi
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