acceleration dead spot

[boostedflex]

Hey guys, try this next time you hit the dead spot, pull up on the brake pedal with your left foot, see if it starts accelerating.  I had this same thing, turns out my brake light switch was messed up, when the brakes are pressed (or in my case when the switch was acting stupid), at those rpm's i would give it gas and it would die, for me initially i found taking my foot off the gas then putting it back on it would correct the issue, then after like six months i finally figured out root cause.

[SHOdded]

I had this same thing, turns out my brake light switch was messed up ...

Good to know

[Blackhawk]

Man I think you just nailed my problem because I have noticed sometimes when I park my brake lights stay on and I have to tap the pedal to get them to come off.  I never considered it happening while I was moving.

This would certainly be a lot easier to fix then and engine or transmission issue.

How did you fix the brake light switch?

Hey guys, try this next time you hit the dead spot, pull up on the brake pedal with your left foot, see if it starts accelerating.  I had this same thing, turns out my brake light switch was messed up, when the brakes are pressed (or in my case when the switch was acting stupid), at those rpm's i would give it gas and it would die, for me initially i found taking my foot off the gas then putting it back on it would correct the issue, then after like six months i finally figured out root cause.

[SHOdded]

The brake light switch or stoplamp switch (P/N 8T4Z13480A/SW6559, I believe) or BOO/BrakeOnOff switch should be fairly easy to replace.  From the 2007 Edge FSM:

Removal

Disconnect the stoplamp switch electrical connector.
NOTE: The stoplamp switch will be difficult to remove if the switch plunger is not depressed. A slight rearward force should be adequate to depress the plunger.

With a light force (approximately 1-4 N [1-3 lb]), pull rearward on the brake pedal, rotate the stoplamp switch 45 degrees clockwise and remove the stoplamp switch.
Installation

CAUTION: It is very important to not press, pull or touch the brake pedal assembly during the installation of the stoplamp switch. Failure to follow these instructions may damage the stoplamp switch.

Without movement to the brake pedal assembly, install the stoplamp switch and rotate 45 degrees counterclockwise.
Connect the stoplamp switch electrical connector.



More images here

[ZSHO]

Some times the remote start feature is disabled due to a faulty brake pedal switch or low battery.  Z

[Blackhawk]

Thanks, The switch is much cheaper then paying my warranty deductible, I was wondering if something else in the brake pedal mechanics was maybe binding when he fixed it.

[boostedflex]

On mine i was worried it was mechanical with the pedal, not the switch, however the switch was like 30 dollars i think, so i gambled and it paid off, took like ten minutes to change, and this was at least four months ago, no problems since

And let me tell you, the dead spot PISSED ME OFF TO NO END, I was ssssooo happy when this fixed it.

[SHOdded]

Some times the remote start feature is disabled due to a faulty brake pedal switch or low battery.  Z

Any idea why the switch is involved, Z?  Is that the car thinking someone's in the vehicle?

[FoMoCoSHO]

Some times the remote start feature is disabled due to a faulty brake pedal switch or low battery.  Z

There are actually quite a few dtc's that will disable it as well. Like when my vct cam solenoid failed.

[Blackhawk]

It has aggravated me to no end, I was dreading putting the car back to stock to take it into the dealer.  When it happens it feels like a serious problem with the car yet there are never DTC's.   It never happened on the way home today to try pulling up on the brake pedal but I'll just order it since I've seen them get stuck on in the driveway.  Thanks again!

On mine i was worried it was mechanical with the pedal, not the switch, however the switch was like 30 dollars i think, so i gambled and it paid off, took like ten minutes to change, and this was at least four months ago, no problems since

And let me tell you, the dead spot PISSED ME OFF TO NO END, I was ssssooo happy when this fixed it.

[SHOdded]

If you are using Forscan datalogging software, there should be a PID for BOO so you can see evidence for the problem if it happens again.

[Blackhawk]

Thanks, I'll check that out.

If you are using Forscan datalogging software, there should be a PID for BOO so you can see evidence for the problem if it happens again.

[Blackhawk]

I downloaded Forscan lite and used it on my drive in this morning to monitor BOO1 and 2.  I can definitely seeing the brake switch sticking and saw it on while I was having accel problem. Thanks for pointing the PID out, it gave me even more confirmation this was the problem.

If you are using Forscan datalogging software, there should be a PID for BOO so you can see evidence for the problem if it happens again.

[SHOdded]

Cool!

[sho-me19]

You guys hit the nail on the head with the questions I had after getting a Unleashed tune on my 2011. Feels like I have the acceleration dead spot possibly as well. Being new to tuning and what not I was wondering if someone can point me to somewhere that explains how to datalog. I use a sct x3 tuner if anyone is familiar. With that. Thanks for the help. This forum definitely makes you feel like you have a team of mechanics.