Hi all. I'm new to this and I'm having a problem with my 06 F150 with the 5.4 L triton. I'm having a problem stalling out at an idle when the engine is warm. The engine light doesn't come on until it has stalled out. Then I have a bit of a problem starting it back up after it has stalled. I've changed the fuel filter, one of the fuel injectors, replaced the battery and still having the same problem. Any help or advice on where I should look next would be greatly appreciated! Thanks

 

Hi David! Welcome to the forums.

How many miles are on your 5.4 L triton?

If it is over 100k, you might want to change the plugs.

What was wrong with one of the injectors? Leaky?

 

It has 127k on it but I did a tune up about 20k miles ago. I'm not sure what was wrong with the injectors but it was causing my engine to misfire. Figured that would solve my stalling problem but it didn't.

 

Interesting.

I'm still leaning towards a leaky/problematic injector.

Also a failing FPDM could be causing this issue. They can do funky things when they get corroded.

 

So would you just recommended checking each injector?

 

You may have a batch of injectors left over from the 2005 run that were defective and leaky.

DEFINITELY check the FPDM, they are very subject to corrosion.

 

BTW, the FPDM stands for Fuel Pump Driver Module. It sits kind of behind/above where your spare tire is if I remember right. It's just a connector, and when corroded, it can cause some weird problems.

Here's what it looks like brand new:


And installed:

 

Start simple. Clean your MAF sensor and air filter. If you are up to it, throttle body as well. It will cost you less than $15 at the auto parts store for the CRC brand aerosols. I had a similar problem and replaced the FPDM, Fuel filter, plugs and never checked the MAF sensor.

 

That thing left me on the side of the road. Had to get a tow truck.

 

Same thing happened to me a few years back.

I cleaned the Throttle body really well, and it fixed the issue. That was my problem. I would suggest cleaning yours to rule it out.

 

Just be sure not to touch the throttle plate.

 

You can touch it, just don't move it. It needs to be cleaned too.

 

Thanks glc! That's what I meant to say. Ooopps.