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Discussion Starter #1
Hi everyone. My wife took my 04 Spyder GS Friday. When she returned, she said the car was driving strange. Sure enough, it was running on 3 cyl. So I got a code P0304. So I checked the coil and it was firing. Switched the coil with #2 coil and #1 plug to see if it would be the same, Still a misfire. I drove a bit and now had code P0302. So I thought for sure it would be the coil. Here are the results of my tests.
Ignition wires are at 1.8Ω
Coil Primary 1.5 KΩ
Coil Secondary 10.5 KΩ
Current flowing through primary as per shop manual test with 1.5 volt battery to test transistor.
Spark test on all cylinders with a spark tester are all OK
Compression between 185 to 195 psi on cylinders.
All injectors are pulsing and test 15 to 15.5 Ω
All plugs were changed when the timing belts were done about 3K miles ago and they all look new. I even switched them around but I did not get recuring misfire codes yet but still have the same problem..
What should I look at next??
Don
 

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Discussion Starter #2
Well, I tried bench testing the coils with a battery and test light. Now I need 2 new coils since I blew the old ones. Ill get back once I have new coils.
Don
 
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