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Old 01-30-2011, 16:51   #1 (permalink)
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1991 Mercury Gran Marquis will not start

hey my 1991 Mercury grand Marquis will not start, unless you spray starting fluid in the throttle body then it will, it will Idle (kinda high) and go down the road will no issues I can hear, when I turn it off I have to do it all over again, so far I have replaced the fuel pump, computer( from salvage yard), air temp sensor and coolant sensor, and fuel regulator, Even if I turn the key on 5 times then try starting I have no luck. I'm slowly losing hope, Stumped on it and getting closer to having someone look at, at a shop (I usually do my own work). Anyone have any Ideas????? Maybe tomorrow I'll try a new fuel filter even though I replaced it last year.
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Old 01-30-2011, 17:23   #2 (permalink)
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Re: 1991 Mercury Gran Marquis will not start

Have you tried some Fuel injector cleaner thru the system yet?
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Old 01-30-2011, 18:44   #3 (permalink)
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Re: 1991 Mercury Gran Marquis will not start

no i ran iso heet, which i know is not fuel injection cleaner but i do have some maybe i will try that
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Old 01-30-2011, 19:13   #4 (permalink)
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Re: 1991 Mercury Gran Marquis will not start

Is it idling high all the time it runs? Also try this and see if you come up with anything. http://fordfuelinjection.com/index.php?p=13
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Old 02-10-2011, 22:42   #5 (permalink)
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Re: 1991 Mercury Gran Marquis will not start

have you attempted changing the fuel pump relay? also changing the fuel filter isnt a bad thing to try... i had to change a fuel filter 5 times in 3 years on same car...
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