Quote:
Originally Posted by hstephenson
I recently replaced the heater control valve and OAS while i was in there. The car ran fine for about a week. now throwing 300, 302, 304, 306 misfire codes. can anyone give me an idea what to look for. cannot find any vacuum hoses loose.
2003 Boxster S
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Cherck
ALL the AOS connections ensuring they're snug.
ALL connections... not just the ones you can see. There's a snap-in tube on the AOS that snakes into the hidden world... and, when you're disconnecting it from the AOS... it could become loosened or dislodged on the other end (hidden world).
My money is on the AOS connections, not that I have any money.