new2mazda

iTrader: (1)

ok frustrated tried 2 dif fcd's and i still get a massive hesitation and studder at 5500... around 5-7 psi sooo idk unless the fcd's arent working. i have an rtek ecu on the way just wondering if there are any other ideas...

calpatriot

1. fuel pressure?
2. clogged injectors?
3. Is it going lean or rich at the stutter (O2 sensor voltage under or over .45 volts)?

barnett87rx7

iTrader: (1)

try new wires and plugs sometimes the old ignition system can ignite all of the fuel, also check your tps

florotory

i feel ya. I have the same problem. I havent figured it out yet. it is frustrating. My fcd didnt help either. My next step is to send the injectors out to have them cleaned.

vato2000taco

iTrader: (1)

sounds like boost leak after afm . check for small leaks especially around the tb theres like 6 vac lines there also rats nest if u have it still installed. i had the same problem and turned out to be a leak on the piping i made that had a rubber nipple that had cracked. also my stock tid had blocked off hole where the stock bov/recirc valve reentered the tid and it was leaking . fuel cut is usually around 7 psi so i dont think its that

new2mazda

iTrader: (1)

well my car has mostly been sitting for a while, waiting for paint. but did emissions removal and found a vac line half assed plugged with a screw.... replaced it and believe its all good

new2mazda

iTrader: (1)

well... nvm... still hitting some sort of fuel cut past 8 pounds while using an rtek... is it automatic if u are leaning out or is there something doing it purely based on boost"?

new2mazda

iTrader: (1)

just replaced my secondaries and its still doing it... would a bad tps cause all this