i have a 1990 f250 7.3 idi non turbo. I bought the truck and the second owner said he had replaced it a couple months before I got it. Have the paper work to back it up. Sometimes when you turn the key on glow plugs stay on for 10 sec then come off but the relay doesn't click? But if you turn the key off then back on it will click. Maybe bad relay?
Glow plug relay question
- Thread starter Fordfan90
- Start date
madpogue
Full Access Member
If the glow plugs are on, the relay must be closing. Maybe you just don't hear it the first time.
Does it start?
Yes it starts just doesn't seem to fire up as fast as my other one did and it does have brand new zd9 glow plugs.
Haven't really had time to look into as I'm trying to figure out the knock it has upon start up
I'll take a look at that if the little clips I guess is what you call them are broken can you get new ones for it?
bbjordan
Snow Monkey
Then you don't have to wait.
Seriously tho, watch your volt meter. Does it drop to about 8 volts when the the glow plugs are supposed to be glowing? The glow plugs draw a lot of power. You'll notice a substantial drop in voltage when the controller is activated.
Then you don't have to wait.
Seriously tho, watch your volt meter. Does it drop to about 8 volts when the the glow plugs are supposed to be glowing? The glow plugs draw a lot of power. You'll notice a substantial drop in voltage when the controller is activated.
Nope barley moves
bbjordan
Snow Monkey
Could be a bad relay. Check the ground wire on the controller, if it is broken or grounding poorly, that could cause you grief.
madpogue
Full Access Member
Time to check fuses again.
Except there are no fuses on the glowplug circuit.
Which one is the ground in the gp controller? If the ground isn't the problem can you put in the manual gp switch? I've been wanting to but don't know if you have to buy a special controller for it.
