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Trouble codes 301, 302, 303


Vehicle Information: Model: 993; Year: 1996; Body Type: Coupe; Total Mileage: 60450;

Hello,This is my first post, although I read almost all the posts submitted to the 911 1995 to 2005 list.I have had my 1996 993 for a year and put 8,000 miles on it and it has been flawless, that is until I took it in for the 60k service. The tech said it is in great shape and everything was fine.The problem started when I took it out for a drive a few days later, check engine light came on, I headed home and then took it back to the shop the next day.Trouble code was 301 (misc misfire i think) they kept it for a couple of days, change out the distributor caps and a couple of other things and thought they had fixed it.Within 30 miles of driving the trouble light came on again.Long story short, I have had it back to them a few times now. On Friday I stopped by and had them check the codes, now there are 3, 301 302 and 303, he cleared them and then I went for another drive, this time it took about 50 miles before the check engine light came on.This is a reputable service center they have been great, I think they know what they are doing, but I was hoping to get some input before I take it back to them on Monday.Any ideas what could be causing this?Thanks in advance for your help.Bret

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