Car keeps misfiring?

[Ethos395]

Bought an 05 gt 5mt awhile ago and car ran great for a week but it started misfiring on acceleration and got a (P0306 code) which I just thought would be a coilpack or plugs so I switch coilpacks around to troubleshoot and it stayed on cylinder 6. before I even got to getting new plugs I got a new code (P0206 injector 6 circuit malfunction) which then led me to thinking its the injector. Car sits a few days and now it basically always misfires on cylinder 6 as soon as the car warms up and i get a code (P0316 misfire on startup). Tonight as I was pulling into my driveway the engine sounded something blew so I shut it off, turn it back on and back to normal but new code came up (P0340 camshaft position sensor a bank 1 circuit malfunction). Before I just go replacing a bunch of parts that might not even be the problem anyone smarter than me have any ideas or know what's going on?

 

[StockishS197]

Welcome!

The misfire on cylinder 6 is very specific, so I would check fuel, air and spark. Injector codes aren’t common, so that seems to be a strong culprit. Factory coils rarely go bad on these cars, but an easy check here is to swap with an adjacent cylinder and see if the misfire follows.

P0340 is a common failing alternator induced code, which can cause a number of poor running conditions on these cars. How is running voltage?

if it were me, I would check the cylinder 6 injector connection and wiring for a good connection, look for any fraying or issues and perhaps check key on voltage at the harness with a DVM. If that checks out, I would pull the cylinder 6 injector and try a bench test with a 9V battery to see if I can hear the injector clicking/opening when voltage is applied.

 

[JC SSP]

No mention of mileage...

Have you done a simple compression test?

 

[Ethos395]

Well I went through the injectors and #6 wasnt plugged in all the way. Went around the block and it ran great hope that was my problem lol.