Complete newbie here. My driver side glow plugs are fried at the moment.

The diesel guy I took it too didn't know if the passenger side was fast fire or slow fire. I'm trying to replace the driver side.

Should I just replace all of them so I don't get a slow fire/fast fire mix on accident? Or just assume the passenger side is fast fire?

For what it's worth the truck still starts, just takes a good bit of cranking.

If anyone could post a link to the glow plugs I need that'd be awesome. Thanks in advance!

 

BOSCH Part # 80034 available anywhere.

Replace them all and check for power flow to each glow when they cycle-fusible links can burn out.