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Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose), Mercury Technician
Category: Mercury
Satisfied Customers: 43873
Experience:  16 years experience with Mercury
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99 grand marquis have no injector pulse.

Customer Question

99 grand marquis have no injector pulse.have fuel pressure and spark
Submitted: 6 years ago.
Category: Mercury
Expert:  Tim West replied 6 years ago.
Thanks for visiting Just Answer,
Is there a theft light flashing?
Expert:  Chris (aka- Moose) replied 6 years ago.



I'm Chris, Thanks for allowing me to help you here on Just Answer.


No pulse means you have a passive anti theft system fault or a cam sensor not telling the PCM when to fire the fuel injectors. You first step is to monitor the theft light, flashing rapid (180 times a minute) means its a PATS fault. Not flashing while starting is most likely the cam sensor.