p0307 I've tried everything
Thread Starter
Teching In
Joined: Oct 2010
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p0307 I've tried everything So I just did the head gaskets in my stock 97 Z28 and now it keeps throwing DTC p0307, misfire cyl 7. I already replaced the spark plug, checked the wire with a multimeter, swapped the injector from cyl 7 to cyl 1, double checked the valves, and vacuum lines. I installed a chandler motorsports opti and MSD coil about 1000 mi ago. I'm out of ideas
Thread Starter
Teching In
Joined: Oct 2010
Posts: 8
Likes: 0
update....
does any body know if bad opti or o2 sensor can cause a misfire on just one cylinder? i ask because i disconnected the electrical connector on the fuel injector while the car was idling and nothing changed, the ses light didn't even come on. i checked the connector and electrically the fuel injector is working, and like i said i already swapped the fuel injector from cyl 1 to cyl 7. that is why i'm thinking it might be the opti. when i start the car i can hear a miss, and it shows a pending code p0307, but the ses light doesn't come on until the car is warmed up, thats why i suspect the o2 sesors. sorry for the long post, just trying to get all the info out there.
Thanks and happy new year.
does any body know if bad opti or o2 sensor can cause a misfire on just one cylinder? i ask because i disconnected the electrical connector on the fuel injector while the car was idling and nothing changed, the ses light didn't even come on. i checked the connector and electrically the fuel injector is working, and like i said i already swapped the fuel injector from cyl 1 to cyl 7. that is why i'm thinking it might be the opti. when i start the car i can hear a miss, and it shows a pending code p0307, but the ses light doesn't come on until the car is warmed up, thats why i suspect the o2 sesors. sorry for the long post, just trying to get all the info out there.
Thanks and happy new year.
