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Looking for some suggestions on spark plugs for Mazda speed protege ... Car currently has Silicone hot pipe cold pipe , injen cold air intake , new egr valve , boost gauge ....any tips are helpful . Thanks

Thanks zealoustheender , it runs good now , i just replace the egr valve because it wouldn't even hold and idle and i pulled old egr out and it was so rusted all the bolts wouldn't even come out .... So far i have got boost gauge and intake is on the way ... How did ur car run once u installed...

Yes prefiero

It was the waste gate actuator , car runs good now, alot less power in the long run ...now that the car is running smooth what can I do to get it pushing close to 7psi as I am only at 5.5 psi through full boost ... I wanna get an intake . Any ideas on minor mods to help me out ?

No boost gauge .. Car is stock . ..

Car boosts up and then "hits a brick wall " like the spark is being cut off ... Really doesnt sound good ... Car idles fine drives fine besides while boosting .. Really dont kno what it could be .. Any help is great!

Thanks everyone i will check tommro .. I read some where about a hose under the intake manifold that could break and cause a lek that would cause lean mixture ?

What's up everyone i just recently bought a protege speed and Love the car but its been hesitating on boost and has a hard fuel cut off at about 6,000 rpms in 2nd and 3rd gear .. Throwing codes for lean mixture and maf sensor .. Replaced maf sensor and saw no difference l.. Please someone help...