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SPI Performance (2000-2004) The place to chat about any 2.0L Split Port Injection engine performance, tuning and exhaust related upgrades.

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Old 05-05-2012, 07:21 AM   #1
Focus Rookie
Join Date: May 2012
Fan#: 98478
Location: Austin, TX
What I Drive: 2003 blue 2.0 Lx

Posts: 2
FF Reputation: 1 Jesse2.0 Good Standing Member
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Random misfire

Okay guys I'm new to this and new DIY but hey there's only one way to learn right. Anyways I have code p103 p200,p300,and p400 from my dash trick thing. The engine light is not on and every time they hook up a scanner to my car no codes come up. So every 2-3 days I have a misfire and all but one time it happens when starting the car that one time was at a red light. Also not sure if related or not but the last two times I put fuel injector cleaner in my gas tank the car actually shuts off and takes multiple times to start the car.

Ford focus 2003 spi SOHC LX
What I done: fuel filter, air filter, spark plugs and wires, pcv valve, and two small vacuum lines that connect to two nipples on the firewall.

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