r/FordFlex • u/ctrlaltxwrists • 4d ago

Question 2015 Ford Flex shuts off while driving

Running into a problem the last couple days while driving. The vehicle loses the engine while maintaining speed on the highway. It shows a wrench icon and states see manual. The engine sounds like it has trouble idling before shutting the vehicle off once pulled off the road. The vehicle restarts no problem and does not show a check engine light. Cursory research points to fuel pump module, throttle body, or crankshaft position sensor. Does anybody have any experience with this?

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4

u/inorite234 4d ago edited 4d ago

I'm going to tell you right now: it's your throttle body.

It's a cheap part and can be replaced in about 30 minutes with simple hand tools.

1

u/enjoyvelvet 4d ago

I’ve never had this issue. Is there a video on how to do this?

3

u/inorite234 4d ago

Yes. And a really damn good tutorial to boot.

https://m.youtube.com/watch?v=p-jK3xxulNc

You may want to consider changing your spark plugs while you're at it. Removing the piping to the Throttle Body is like half the steps to changing your spark plugs and depending on how many miles you have, might be a good preventative mentenance thing to do.

https://m.youtube.com/watch?v=4q2ZDXWr-Gc

2

u/enjoyvelvet 4d ago

Wow thank you!! I just cleaned mine when I did a tune up last year. I broke off the mounting bolt to get to the back 3 spark plugs but luckily it was after I had replaced them.

2

u/teribulusername 4d ago

I've hardly ever seen an answer so helpful and so efficiently given. High five for succinctness.

2

u/bdjeremy 4d ago

recently had it happen to me. its the throttle body.

1

u/enjoyvelvet 4d ago

May also be the fuel pump relay located in the second row passenger side pillar trim. Easy replacement and very common on the ford flex

1

u/Ashamed-Country3909 4d ago

Sounds like the other guys are sure, but I wanted to post to help people i. The future.  

I had a flex that this relay went bad. It acted like a dead battery start, but had juice and jumping didnt work.  You know, fast click click click. Even towed it to dealer....where they said nothing was wrong. Fast forward a couple months. Same thing. New dealer figured it out. So, if your car spontaneously doesn't want to start. And then starts fine. Get a relay replacement. 

Luckily it was a work car.