My crwn vic wont turn over sounds like wants to start but wont has half tank of gas,where is fuel filter,and fuel pump? my car is 1988.

check codes first--may find problem there.
check spark on more then 1 cylinder.
check fuel pressure and volume--if fuel filter is stopped up, may have overworked fuel pump. With fuel cap off you should hear fuel pump running (key on) If not running, check for power at sub harness--Lastly tap on bottom of fuel tank with RUBBER hammer while someone else is cranking vehicle--if it starts get it to where you can remove tank before turning off--very often one time deal.

Give use any codes you may have

I have a 2004 LS I will check my diagnostic
manuals for you

V6 or V8 ?

would say lack of fuel ie check fuell pump if carb is it blocked

The hardest part about replacing the fuel pump is wrestling down your fuel tank.The pump is inside of the tank and requires tank removal.As long as you own a couple of jackstands and a floor jack, you will have a fairly easy time replacing the pump itself.This should take the weekend warrior about four to five hours labor time.I hope I could help!!! Thanks for using Fixya!!!

For home shade tree mechanics 8 hours on average. 2 hours for a pro with the tools required for draining the tank

by pass relay to see what happens.

heres a list of things to check: fuel filter(s), in tank fuel pump,(listen for a buzzing sound in the rear gas tank area when key is in the on position but not engaged in start), fuses(inside and out), fuel level, check for spark, (spark should be blue, not yellow)

Inside the fuel tank

check for clogged fuel filter first, usually the pump works or it dosen't, check and get back to me.

should hear a whirring humming sound from the fuel tank (if that is where the pump is located) just turn on the key and take off the gas cap you should hear it.
Also did you drain the fuel from the tank when you had it down ? after that many years the fuel would be "gummed" up.

Robert