2004 Jetta new glow plug codes

mcaruthers

Member
Joined
Aug 10, 2016
Location
Kansas
TDI
2004 Jetta
Looking through many glow plug posts on here, but still have questions. I have a slight miss when accelerating. Also have CEL with 2 glow plug codes.
Tested the ohms on the glow plugs, and all are at 1.1-1.2 ohms.
Tested the harness at each cylinder, and get 8.7-8.9 volts on each leg while glow plug light is on then 3.5 volts after the light goes off. I read that this should be 12 volts when the light is on?
Pulled a glow plug and they are NGK Y732J....12 volt. This was confusing for me. I had replaced them about 200,000 miles ago, and just put in what the parts store gave me. I read that these should be either 5 or 7 volts?
I have 350,000 on the car and it still runs pretty good, but I want to take care of the cel's and the miss on acceleration.
Questions are: Should I be getting 12 volts on each leg of the harness? Are the 12 volt plugs the wrong plugs? I am not sure if the plug recall and flash was ever done on the car.
Thank You.
 
Top