Wait to start light

[DneprDave]

The wait to start light stays on for a long time, as if the engine were cold, even when the engine is warmed up. This just started happening this weekend. I also got a check engine light, I plugged the scanner in and it says there are no fault codes.

Other than this, the truck starts and runs just fine.

Is there a temperature sensor for the glow plugs that could have failed?

Dave

[ford99PSD]

try the Glow plug relay. my WTS light stayed on for about a minute at times, after the new GPR wts light came on and went off like normal again, someone will tell you how to test it.

[DneprDave]

It's a brand new glow plug relay, about 1 week old, purchased from Ford. The old relay was inoperable over the summer, got a new one when the weather started getting cold.

The light acted normally even with the broken relay and for the first 4 days with the new relay. The engine starts quickly now, even on cold mornings.

What tells the glow plug relay how long to operate? There must be a temperature sensor somewhere.

Dave

[z250kid]

yea im not 100% sure of but i think theres one in oil theres one in the air intake