Something is not right here. There shouldn't be an ISC, it should be an IAC on a 1990, and there shouldn't be " a wire," there should be a two-wire hardshell connector that just plugs into the IAC valve. Did you have a connector come apart or something? The circuit is simple. It has a two wire connector that plugs into the IAC, and the two circuits run all the way back to the big 60 pin connector at the PCM.
For a 1990 Ford Crown Victoria : According to my Chilton's book : With engine oil filter change : ( 5 U.S. quarts , for the 5.0 liter / 302 cubic inch and the 5.8 liter / 351 cubic inch , V8 engines )
According to one of Fords websites : For a 1990 LTD Crown Victoria police interceptor with the 5.8 liter / 351 V8 : The spark plugs are gapped at ( .044 inch )
In a 1990 Ford Crown Victoria the 5.8 liter / 351 cubic inch engine takes ( 5 quarts with engine oil filter change ) * I'm just using the Crown Vic as an example *
I have a 1999 crown vic and the fuel pump switch is in the trunk on top of the driver side rear wheel wheel . the is a a sticker indicating what it is ... If not I would check my owners manual
yes they will
hydraulic roller cam.
No you do not have to lift it up they will fit.
right next to the engine
Its on the registration. Its around 3,600 lbs.
Have to remove the oil pan. It's in there.
I have a 90 crown vic. Send me a email address. Mine is firstname.lastname@example.org
You've got a bad headlight switch and need to replace it, that's the switch you pull in the dash to turn the lights on. That's why the headlights only work on bright but not dim.
You need a new ignition switch .Dont have a lot of keys on your key ring all that weight wears them out.
under the car, passenger side, up around the exhaust.
in the hazard switch
For a 1990 Ford LTD Crown Victoria : The engine cylinder locations are numbered : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
Driver's side of the engine, just behind & below the power steering pump.
Try 87 octane Regular gasoline is OK. gasoline + 10% ethanol, and gasoline + 3% methanol are also possible (if you have a 302cid 5.0 SEFI Windsor engine) the crown Victoria 1990 works better between 90 - 92 octane. best performance gained from 92 octane , smoother acceleration.
The original Crown Victoria was only produced from 1955 to 1956. The name was revived in 1978 and applied to the full sized LTD (the midsize LTD was succeeded by the Ford Taurus). That remained so up to 1990. In 1991 (for the 1992 MY) it was renamed the Crown Victoria. Those remained in production up to 2011 (2012 MY), whereafter it was replaced by the Ford Taurus.
Henry Crown died in 1990.
It might be that your main fuse is blown or a bad ground. Can't think of anything else it could be.
That's easy... 1-5-4-2-6-3-7-8. Happy timing!