Start Stop
Senior User
Joined: Jun 2004
Posts: 155
Likes: 4
From: Tennessee USA
I have to re-track this statement " MAX COOL does NOT stop Auto Start/Stop. This morning, Max cool was on, I came to a stop light and the motor shut off. It was only 92 outside temp. As I waited for the light to change, the AC blower had stopped running, a very eerie silence and before the light changed, the engine cranked over 3-4 times, it started but was like shuttering, it then smooth out (Note I still had my foot on the brake). The light changed and off I went.
It look like the feature is activated based on temp, not what you have set. I was really disturbed by the shaky restart. Didn't sound good. ????
It look like the feature is activated based on temp, not what you have set. I was really disturbed by the shaky restart. Didn't sound good. ????
Elder User
Joined: Aug 2005
Posts: 536
Likes: 5
From: Phoenix, AZ
If the engine restarted while you still had your foot on the brake it was probably because the system detected that it was getting too warm in the cab. That's ONE of the reasons it won't shut down.
I wouldn't worry about the shudder. It's normal. Remember the engine is restarting against a trans that's still locked into first gear by the electric pump in the trans. Not like starting up in park or neutral.
I wouldn't worry about the shudder. It's normal. Remember the engine is restarting against a trans that's still locked into first gear by the electric pump in the trans. Not like starting up in park or neutral.
Elder User
Joined: Aug 2005
Posts: 536
Likes: 5
From: Phoenix, AZ
NO - it only did it once.
Laughing Gas
Joined: Nov 2005
Posts: 983
Likes: 3
From: Detroit 'burbs
When I turn the auto start/stop function off, when I come to a stop it seems like the engine still wants to shut itself off. I feel a small, occasional shudder where the engine would normally stop, almost as if it wants to shut off but catches itself and doesn't.
Fleet Mechanic
Joined: Jul 2005
Posts: 1,470
Likes: 108
From: Staten Island, NY
Mine does it as well. Even more so in Sport mode. I believe its the torque converter unlocking.
Tuned
Joined: Mar 2016
Posts: 464
Likes: 29
https://m.youtube.com/watch?v=y7RrBYs8wJY&feature=youtu.be
Look at 1:43. Yes the 2018 f150 has a button to turn off start/stop. I could be mistaken but I think its a law that the button has to be there. That or just practically every manufacturer has it because every car that I've been in that has start/stop has a button to turn it off. Even then there are several ways to keep the engine from turning off.
Look at 1:43. Yes the 2018 f150 has a button to turn off start/stop. I could be mistaken but I think its a law that the button has to be there. That or just practically every manufacturer has it because every car that I've been in that has start/stop has a button to turn it off. Even then there are several ways to keep the engine from turning off.
Senior User
Joined: Apr 2007
Posts: 190
Likes: 1
Same here. In fact I'm pretty sure I've felt that even when I haven't manually disengaged it - like when the AC is running on high. I think the only time I haven't experienced it is on the first trip of the day, when the engine is still cold. It doesn't even seem to try then.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Laughing Gas
Joined: Nov 2005
Posts: 983
Likes: 3
From: Detroit 'burbs
Same here. In fact I'm pretty sure I've felt that even when I haven't manually disengaged it - like when the AC is running on high. I think the only time I haven't experienced it is on the first trip of the day, when the engine is still cold. It doesn't even seem to try then.
Senior User
Joined: Feb 2017
Posts: 113
Likes: 0
From: East Tennessee
I have had the "studder" for quite a while now. I noticed it was worse when the AC was on. I finally took it to the dealership and at first they said since no codes were showing, there wasn't anything wrong. A tech that knows what he is doing did some tests and concluded that the purge valve was stuck open. They ordered the part, 2 weeks later I went in and had the valve replaced. The "studder" went away with the AC off, however, with the AC on it is doing it to this day. It acts as if it wants to stall, rpms go up and down and hover around 600. I took it back to the dealership and the same tech checked it out. He took 2 17s off of the lot (mine is a 16, 2.7 ecoboost) and tested them. They both had the same up and down idle with the AC on. They say it is apparently normal for the ecoboost. I figure I at least have it documented. In the end, I have accepted that this is just a quirk with these engines, but doesn't affect anything.
Laughing Gas
Joined: Mar 2004
Posts: 1,019
Likes: 6
From: Fountain Valley
Does anyone know if the stock style starter is being used to restart the truck or if Ford is using the sequential coil system between the rear of the block and normal starter ring gear torque converter mount?
Freshman User
Joined: Jan 2010
Posts: 25
Likes: 0
I changed the code using Forscan. It is disabled as of now. Unfortunately I have triggered something with the MyKey settings. If I didnt have a MyKey set it may not have been an issue. Im hoping that I can fix the issue using the other key this eve. I would hate to be limited to 80mph and radio at 1/4-Throttle.
Fleet Mechanic
Joined: Jul 2005
Posts: 1,470
Likes: 108
From: Staten Island, NY
The 3.5 EB uses a conventional starter motor, although I imagine it might be a heavy duty unit to stand up to the start / stop system.
Elder User
Joined: Aug 2005
Posts: 536
Likes: 5
From: Phoenix, AZ
I don't know if I'm ever going to get used to it stopping. Its like "why is the AC slowing down ?". Oh yes its "START/STOP" again. I'm going to make a sign to hang from the rear view mirror "TURN OFF START/STOP" or Really fix it.
LOL
LOL
Thread
Thread Starter
Forum
Replies
Last Post
imper
Computer Chips & Tuners
2
Aug 18, 2014 07:00 PM
Usaman
1994.5 - 1997 7.3L Power Stroke Diesel
27
Jul 15, 2012 04:01 PM
QDawg
1983 - 2012 Ranger & B-Series
4
Feb 23, 2004 11:16 AM