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Thanks Pedro and Marc. I've searched and tested pretty much everything to narrow it down to a few possibilities. What I didn't mention, was that when the original misfires occurred, we were traveling on the highway. Luckily we were only 2 miles from home and we limped it in. As I mentioned in my original post, I had the intake tube off and inspected all the rubber bits looking for unmetered air.by TimT - Main Forum
Hi Everyone. I have a 98 Boxster 2.5 with a manual. 108,000 miles. After we pulled it out of storage this spring the car started a stumble and misfire. I pulled codes P0131, P0137,P0151, P0157, P0300, (01, 02, 06), P1128, P1130, P1318. After checking all the info, we determined that the coils and plugs needed changed (Coils cracked and split). So..6 new coils, Bosch +2 plugs, and spark plug tuby TimT - Main Forum