FailSafe Engine Mode?

[Tarheel05]

So i was driving down Babcock after PT going about 50 when my RPM's suddenly shot down to 1500. When this happened my dash read "FailSafe Engine Mode", and after that i couldnt go above 35 MPH the rest of the way home....any ideas on what this is or what is causing this? Any input is welcome because i am at an absolute loss..

[aguilarf]

Check the basics first, coolant level, check Tune if you have one, check for loose or unplugged connections, hook up a scanner and try to pull any stored codes.

Any mods or is it completely stock?

[Tarheel05]

Its got an offroad X-Pipe, Ford Racing Axle-Backs, 62mm Throttle Body, BBK cold air intake, 4.10 gears and does have a tune.

I hooked my tuner up and here are the codes it is running:
P0354 - Ignition coil switch D Primary/Secondary circuit
P0356 - Ignition coil switch F Primary/Secondary circuit
P061B - Unknown
P2106 - Throttle Actuator Control System - Forced Limited Power

Does that help at all?

[aguilarf]

P0354 - Ignition coil switch D Primary/Secondary circuit
P0356 - Ignition coil switch F Primary/Secondary circuit
P061B - Unknown
P2106 - Throttle Actuator Control System - Forced Limited Power

Does that help at all?

The first 2 indicate the coils on cylinders number 4 and 6 are dead/shorted. Did you wash your engine/get it wet?

The last 2 may be related to the CAI. Try reflashing to stock to test after you check replace the coils.

[Tarheel05]

Are the coils an expensive fix?

[aguilarf]

Check them first to make sure they are not wet or have moisture in the bore.

The test procedure can be found here:

http://www.f150forum.com/f6/how-test-coil-pack-17249/

Autozone has them for 39.99, but they are Duralast brand, although I would rather get oem Motorcraft .

Check with racer99, he can get you good pricing on oem brands. He is at McCombs Ford West 410/Culebra .

[Tarheel05]

Just dropped it off at Max V for them to take a look at it. This is way out of my expertise. If i need new coils i will deffinetly give racer99 a holler. Thanks for the help man. Hopefully nothin is to awefully wrong with it.