Code p071 on ford explorer 4.6 litter

SOURCE: Cylinder 1 and 4 misfire on my 1997 Ford Explorer

The code description is a giveaway.
It could be one of the coils on the coil pack. Most coils nowadays do two cylinders each. This way car makers can get away with one coil for two cylinders.(lowers costs) One spark fires the air fuel mix in one of the cylinders and the other will fire the cylinder on the exhaust stroke. If the coils are removable, and you are fairly handy with cars,switch two around, the problem will follow the bad coil.

SOURCE: MY 1999 Ford Explorer will not start.

You may want to check a few other componants before you write-off the ECM. It could be it but its not common. The cam or crank positioning sensor, the ignition pick-up, the MAP or MAF sensor, And possibly the ignition switch.

Marvin

• 85242 Answers
• Posted on Sep 16, 2008

SOURCE: 97 ford explorer 5.0 coil pack& plug wire diagram

Go to this web site for the info you need


http://www.moddedmustangs.com/reference/firing-orders.php

SOURCE: my 2005 ford escape will not start... problem

Swap the coil pack with another cylender. If the error code follows the coil pack then replace the coilpack.

SOURCE: ford explorer ,4 litre. have code of P0171

You could be right but before going to all that trouble of replacing the intake gasket take a close look at the MAF (Mass Air Flow) sensor. Also look for a vacuum leak downstream of the MAF sensor. The MAF sensor may be dirty especially if you are using an "oiled" air filter and it was over oiled. Remove the MAF sensor and clean it with electronic cleaner. Make sure it is dry before reinstalling. If it is damaged, replace it. Also replace the fuel filter as a partially clogged filter has been know to set this code on some vehicles. Check all vacuum hoses and replace as necessary.