OK so I have a 02 Passat 1.8 turbo that I purchased on craigslist about 8 months ago the check engine light came on about a month after I bought it but came back as a cat code. and never drove funny or anything until about a month ago it threw a random misfire code p0302 and I switched the coil pack on cylinder 2 with #3 and switched the spark plug with #1 reset it and drove for about 2 weeks before the check engine light came back on and it says all four are now misfiring. the car still drives just idles like its timing is off and is sputtering the whole time like its about to die. just about two days ago two lights came on on the dashboard one is the battery light and the other is a triangle with a circle around it. spark plugs appear good still coil packs are still good checked the MAF that's works still PLEASE HELP!!!!!!!!!!!!!!! i took the battery off (+) while car was running and it stayed running but the battery light stays on when i start it and dash says check alternator. then goes off after 2 mins. i pulled the coils one by one while it was running and the 3rd coil made no diffrence in the motor replaced the spark plugs this morning and no change actually much worse