i notice whenever i release the pressure form the gas tank when refilling, the car runs really strong at first. but once the fuel gauge goes down to near e, the car becomes a bit sluggish. weird considering the car should be lighter due to some 12 gallons less weight from the gas. this cant be normal right?

 

check fuel pressure regulator and pump

 

Prolly is a dirty filter. My car did the EXACT same thing. Does it also seems to pcik up more throtle response when you fill it? if it does, get a 300zx Filter, they allow more fuel and they get more response. Aslo, ugrading that fuel pump wouldn't do damage

 

replaced the filter a year ago, but ive been running good ol economy grade 87

i just slap on a pressure guage in the fuel line to make sure the fuel pressure regulator is working right?

 

says who?

A larger filter does not mean more response. You can only achieve that with a FPR or larger injectors.

Sure they can support a larger volume of fuel but unless you have an upgraded pump,injectors or FPR it doesnt do anything.

 

Well, Maybe becasue my old filter was cloged it gave me more response, But still biguer filter= more filterign capacity= longer life?

 

^ that kinda **** is like, putting an ebay intake on your car and saying "damn i can feel the power".

 

Everyone saying that a Z32 gave you power - your *** is lying to your brain.

Going Z32 filter isn't wrong, but it isn't a miracle either. You just put a clean, new filter on a car that was probably running a years-clogged possibly OEM from the factory filter.

My guess here is fuel filter too, BTW.

 

finally got around to change it

 

change what?

fuel pump or filter?

 

lol worst thread ever

 

fuel filter and i wont start with enfelo