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  1. 2003 PZEV 2.3L Stutters on Cold Start

    MK1 Focus
    I have a 2003 Ford Focus SE 2.3L Wagon with 136k miles that shudders/struggles to start up when cold. Any ideas for what to look for? I have 4 new spark plugs New starter New valve gasket cover New fuel filter When I put the dash into test mode, fuel pressure was reading around 40 PSI so I...
  2. DURATEC 2.0 PZEV / Can modified stock components be comparable to aftermarket bolt-ons?

    DURATEC Performance (2003-2007)
    I've been doing research on multiple forums and testing out theories myself but I've come to the conclusion that ford designed the duratec platform to be dependable on power output and pretty much regulates it's power through restrictions throughout the system. From the tip of stock snorkel...
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