Spark plugs wires and spark plugs ?

spark plugs have to be properly tightened with a torque wrench. If they're too tight, it distorts the metal portion of the shell and they leak. If they're too loose they leak through the threads. Both will cause misfires. Buy a torque wrench and get the torque specifications from the spark plug manufacturer's web site. the use the wrench to tighten them

It is possible to get bad wire or bad spark plugs or the wrong spark plugs. It is not that common through, it is more common to get the wrong spark plugs or mix up the spark plug wires. But you can not miss wire just one spark plug wire, and with the coil packs per cylinder one would really have to work to miss wire it. So I am assuming that you have a Ford Explorer with a rotary distributor, and either a 6 or 8 cylinder engine. Tell your husband the problem and have him recheck his work. Get out your owners manual and make sure you have the right spark plug for your vehicle. Verify that the spark plugs are proper and securely fitted, that the spark plug wires are securely fitted, and that the wires are wired to the right plug. depending on what year of ford you have this should be very easy to do but you will have to know the firing order. Get a repair manual from the library or look it up via the Internet normally the firing order will have a diagram that show how the spark plug wire run. If all seems in order or this is beyond our ability then visit a reputable garage or ford dealership. You do not want to drive if avoidable, you may cause more severe damage. Best of Luck

if you pulled multiple plugs at the same time, then you could have a misfire from wires that are not routed to the right plug.

You could use a torque wrench to tighten all plugs to the correct pressure - find the specs according to your car year and model.

Take the plugs out and try again.

not sure but if you happened to have cracked one of them or not gap them right it will misfire,and or if you got a wire crossed it will misfire also.,,,,,,,,,,