My 1997 mercury grand marquis has a brand new battery and starter and still won't start unless i go under car and jump start starter with a switch...why??

My 1997 mercury grand marquis has a brand new battery and starter and still won't start unless i go under car and jump start starter with a switch...why?? 3 answers

How do I start my 2000 mercury grand Marquis after changing the starter and alternator? 3 answers

I recently had a alternator catch fire from the top by wires.. Changed wires that were damaged,alternator,and starter figuring that fire blew it out but still it won't start....also I was told i...

Alarm won't let my car start. I have no door key and my romote is broken how can I get my grand marquis to start? 10 answers

I don't know what type of alarm system it has . It came with the car when I bought it . Its a black remote with .one little green button and one big black button

Why is my battery going dead overnight in my 201l Mercury Gran Marquis (new battery) with nothing on and my ignition key out? 6 answers

I have noticed my electric radiator fan is coming on and going off even after the ignition key is out.

I have a 1997 grand marquis when i am driving it and i floor it it does nothing when i come to a stop and start to go again it is slow at taking off 4 answers

So my cousin took off the mass air flow sensor and it runs perfect should i buy a new air sensor or can i drive with it disconnected