You have to remove the air intake duct from the fuel injection system and move it out of the way. It's not easy, you just have to squeeze in there and try to reach them best you can. It may help if you put the front of the car on ramps or jackstands and reach in from the bottom. Good light helps too. It took me an hour for the whole job the first time i did it. It is best to get the good spark plugs that last longer. Good luck.
on passenger side under the plugs and exhaust manifold
Disconnect the battery, remove the engine cowl, remove the spark plugs cables, boots and plugs on the drivers side of the engine, replace with new spark plugs and attach the boot and cables. Do the same on the passenger side of the engine, replace the engine cowl, and connect the battery.
No. Remove the passenger seat, remove the cosmetic panel under the passenger door, peel of the carpet and unbolt the access cover. Younow can see the engine head where your spark plugs are.
you have to remove the inner fender for access. Put car on jack stands, remove front passenger tire, remove plastic inner shield to get to plugs. You will need couple extensions and a "wobble" or universal joint extension to get them
Previa spark plugs are located under the passenger seat. you need to remove the front passenger seat (4) bolts. Remove the jack and holder. remove seat bracket then Roll back the carpet exposing engine cover. Remove the all the bolts 10-12 bolts. Lift off the cover exposing the engine. You will seat a black cover with (3) bolts holding it on, remove cover exposing. The spark plug wires, pull each wire from the plugs. The plugs are deep inside the valve cover. Remove all (4) plugs, look at each plug they should all look the same. If they look different there maybe another problem. Reverse these procedures to reassemble.
The engine is a 3.8L V6, therefore: 6 cyl @ 1 plug/Cyl = 6 plugs.
According to one of Fords websites : For a 1989 Ford Thunderbird , 3.8 liter V6 engine : The spark plugs are gapped at ( .054 inch )
If you take the engine cover off, down the left side of the block (passenger side of the car) are four coil packs. You remove the coil packs and the plugs are inside the block. You'll need an extension to remove them.
Disconnect the battery, remove the engine cover, remove the spark plugs wires and boots, and remove the spark plugs. Put in the new spark plugs, replace the spark plug wires and boots, replace the engine cover, and connect the battery.
Remove the four bolts holding the coil pack to the passenger side cylinder head. Lift coil rail off of engine. Using the appropriate sized spark plug tool, unscrew the spark plugs 1 at a time from the engine and replace with correctly gapped plugs.
After you remove the plastic engine cover. You will see the front 3 plugs across the front of the engine with coilpacks on top of them. You will see 3 plug wires that go from those 3 coilpacks around the passenger side of the engine to the back side where the other 3 plugs are located. To get to those 3 plugs you will need to remove the intake plenum. This part is tricky, and will require a new gasket. Don't forget where all the wires and hoses came from. Good luck
Its located on the passenger side fire wall behind the shock tower next too your diagnostic plugs