1996 F-350 7.3 Powerstroke , truck is running good then engine will lose power check engine light comes on and then will run fine . Ran a diagnostic and no codes found. I removed oil cap from intake and smoke poured out and smelled like wires burning . What would cause this ? I am guessing glow plug short . Thanks Shane

Ford had a lot of problems with this engine. Most diagnosis requires a factory software scanner or one that can interface with the FICM module (fuel injector control module) Now you can perform injector buzz test and glow plug tests. If you can get running then also do a power balance test these test check fuel injectors statically and dynamically with the common rail oil pressure control sensor. These FICM modules are famous failure parts. Napa auto can get them.

MAYBE YOU CAN TAKE TO ADVANCE AUTO AND THEY CAN HOOK UP DIAGNOSTIC MACHINE FOR FREE AND IT WILL GIVE CODE(S) AS TO WHAT IS WRONG BE SURE ALL FLUID LEVELS ARE FULL

run the fault codes first to determine the problem area

You may need to find a different shop

Nothing showing up, is about as common
as any vehicle coming into a repair bay

They know you won't pay diagnostic time or believe
anything your told,so they sent you on your way

Have your Catalytic converters checked! Sounds like there getting plugged!

Hi
Air flow sensor could be a problem.
Every time EML comes on the car computer will put the system into limp mode. To avoid any further damage to the engine.

once switch off, isolated and re-start will re-run the program and clear it temporary.
Ideally you need to get the car plugged in to a Diagnostic computer and see what fault code are stored.

Thanks

replace fuel pump relay.if it still loses power. check fuel pump pressure.if all good scan it check for egr valve going bad.

It may be the O2 sensor. I know it's not the fuel filter, spark plugs, spark plug wires, Vehicle Speed Sensor, Dis. cap, or TCM.

check for vacuum hoses.

Check crank angle sensor. Mine run until warm, pinlks badly/stalls, engine check light then comes on a car runs ok. Ran diagnostic and came back with a faulty crank angle sensor