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so what you saying the prv is fine?

i didnt get to check much because it cold and i dont have the space right now but what i did fine out, when i have the ignition on before cold start my fuel pressure is about 57 psi. but then when i start it it goes up 1600 psi for about 20 sec then drop to about 400-450 psi. is that normal or...

thanks for the help im going to check all these to see if it fix the problem

thanks for the help so what your saying i should take off the intake manifold and the the flap on it to see if the open and close properly?? and also sorry im new to all of this what HPHP

hi i have a 2008 mazdaspeed 3 that i recently bought, its fully stock but when im in 3rd and i floor it at around 4000-4500 rpm the car jerks hard and wont pass it. it also does this when I'm in 4th to. when i accelerate slow the car has no problem passing 4k rpm. i just changed the spark plugs...