99 LTD won't fire up

[mickjj]

I was under the hood yesterday changing an indicator lamp and checking the oil etc. When I had finished I went to start the engine and while the starter turned over it would not fire. I thought it may have been a failsafe on the Compustar alarm system I had triggered. I have been in touch with their tech support and no luck. Am I missing something obvious ?? can any one help???
The vehicle was working fine earlier in the day.

 

[justin146]

You didn't lay your keys by a big magnet or EM device did you? You can kill the chip in the key itself. This will make the engine turn over but never fire.

I wouldnt have thought you could kill the key until it happened to me.

You could try using another key to start it.

 

[mickjj]

No the key was in the ignition and turned on so I could check the indicator bulb I replaced was working

 

[marragtop]

You need to determine if the problem is fuel or spark related. When you turn the key to the ON position, do you hear the fuel pump prime for a second or 2?

 

[00XLS]

Maybe having the key in the "on" position you burned up a relay or something? Just a guess.