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Richard, Mercury Technician
Category: Mercury
Satisfied Customers: 15311
Experience:  12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
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A new question is answered every 9 seconds 1999 mercury grand marquis would not start last night.i

This answer was rated: 1999 mercury grand marquis would not start last night.i was low on gas an put a quarter of a tank in and half a bottle of dry gas.i tried jumping it that didnt work.i was also very low on oil,so i put 2 or 3 quarts sounded like its bout to turn over but jus was 10 below last night.dont know if that matters or not.i have absolutely no idea what to im broke rite now.please any ideas suggestions or answers

Hello and welcome to


So the engine is cranking but not starting? If you hold your foot on the gas will the engine start and run? Is the theft light flashing fast on the dash?

Customer: replied 7 years ago.
yes its cranking but not starting.pressing the gas did not make any difference,still wont not positive but i thnk that theft light is flashing quicker than normal.i cant go chek it at the home an my car is at work



If the theft light flashes rapidly when the enigine is not starting then it's the passive anti theft system causing the problem. You should try another programmed key if you have one and also try tilting the steering wheel as I have seen the connections at the transceiver around the ignition cylinder loose causing this problem. If the theft light is not flashing rapidly then it may be a fuel pump, crank sensor or pcm poer relay causing the crank no start.

Customer: replied 7 years ago.
ok so if its not that flashing light any other suggestions?

If the theft light is not flashing rapidly then it may be a fuel pump, crank sensor or pcm power relay causing the crank no start.


You can try wiggling the crank sensor connector located on the side of the crank pulley next to the a/c compressor, listen for the fuel pump coming on behind the rear axle and try hitting the tank to see if it will com eon, and lastly tap on or swap out the pcm power relay and fuel pump relay in the relay box next to the fuse box under the hood.



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