The firing order is: 1-4-2-5-3-6
Yes , on a 1998 Ford Windstar the fuel pump shut off switch ( inertia switch ) is in the drivers footwell behind the kick panel by the drivers left foot , by the inside hood release ( there is an access hole in the panel )
They always blow the head gaskets between 70 and 100 thousand miles.
If the gauge is reading full (pinned as we call it) it can be a ground to the sending unit or the wire going to it is broken ,,this will cause this..Sending unit wires are on top of the tank some times you can see it (or the wires that go to it )test them there you'll need a good meter!!If you want to see what it looks like go to a parts shop and get them to show you one
Five quarts including filter. My owners manual says 5.75, including filter. My experience agrees with the extra .75 quarts! :)
haynes repair manuals are good but you can go to autozone.com and they have online repair manuels as well it a good site for a lot of information on repair work.
on the crank behind the front cover
Not very easily if at all, and why would you want to?
it's located on the firewall right in back of the intake
Yes you can, you will need to buy a y pipe either at autozone or your nearest parts store. You will also need to buy 2 mufflers flowmasters are my choice but you decide what you want. then buy some cool tips and there you go.
A haynes manual...
3.8 litres is fractionally more than 1 US gallon.
I am not sure what you mean by the radiator bypass. But it sounds like you have a loss of vacuum to your AC/heater control. When you have no vacuum to the control, it defaults to defrost. There is only one vacuum supply entering the passenger compartment through a black hose under the hood on the passengers side close to the AC lines where they go through the dash. There is also a vacuum canister right there. See if you have knocked a vacuum hose off right there.