Outer Limits 4x4 Board

Hi got an issue with my glow plug indicator light it only comes on for about 1.5 seconds.
I have new genuine Toyota glow plugs, they do continue to glow for about 15 seconds even after the light goes out so I just wait ten seconds before starting. A friends Prado glow light stays on allot longer than mine.
Anyone got a clue to what could be the problem? Maybe a temp sensor? If so where is it located?

My 93 Surf 1KZ motor does the same thing- so i just wait for my boost gauge to go thru its startup cycle before cranking and it normally works fine!

does it start fine if u start it as soon as the light goes out

No it doesn't start straight after the light goes off you have to keep cranking it, I usually wait for 10 seconds of so (I wait until the electric aerial has fully extended, make a good timer) It been -2 to -6 degrees here in the mornings

5 seconds is long enough. Direct injection motors kick over easy anyway.

1KZ-TE's are an Indirect injection motor... bitch of a thing to start if your plugs fail too...