Wait to start time

[majorpecs]

If this is a stupid question don't laugh. When I go to start my truck (owned it a week, early 99 with 198k on the dial) the wait to start engine light stay on for 15-20 seconds.

This is the glow plug correct? It has to get to a certain temp before I can start the engine? Should it take that long before I can start the engine or should I replace the glow plugs relay?

[2006PSDSD]

Its based on engine temp, so the colder it is, the longer it will operate the GP's

[late_99_PSD]

The wait to start light is not a light telling you when the glow plugs are on. The WTS light will stay on for maybe 15 seconds on cold days but the glow plugs will stay on for upward of 2 minuites.

[majorpecs]

Well I'm in Texas and after sitting outside in 88 degree weather it still takes 20 seconds...if this is normal then I'm okay with it, I've never driven an early 99...I've had 2 2003 7.3's and a 2004 dmax and none of them ever had any wait time over 2-3 seconds.

[late_99_PSD]

That dosent sound right. When it warms (outside) up it shouldn't stay on that long.

[majorpecs]

That's what I thought. So what should I check to see what the issue is?

[late_99_PSD]

Maybe you have a sensor thats not reading right and making the comp. think its cold outside. A scan tool is about the only way you can see what each sensor is reading.