How long does Jeep need to be stopped for ESS to be useful?

[Ruby Jack]

I know cranking the engine requires a bit more gas than an idling engine, so if I were to stop for only a second or two and the ESS kicks in, wouldn't that be a net fuel efficiency loss?

How long will I need to be stopped for the ESS' fuel saving to kick in?

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[Sean L]

I know cranking the engine requires a bit more gas than an idling engine, so if I were to stop for only a second or two and the ESS kicks in, wouldn't that be a net fuel efficiency loss?

How long will I need to be stopped for the ESS' fuel saving to kick in?

Running a warm start on a modern fuel injected engine doesn't use as much fuel as they used to. If your vehicle is stopped for longer than a few seconds it will benefit you a little bit, but not to the point that you will notice. I think your real payoff in fuel savings is at long stop lights where your engine would normally be idling for 4 or 5 minutes (depending on where you live) without moving the vehicle.

At a stop sign, I use light brake pressure to avoid the auto shutoff as I know I'm just going to move forward in two seconds and that's when the auto start/stop can get annoying. It takes a little bit of experimenting to know where the brake pressure needs to be but you can really use ESS to your advantage when the situation calls for it.

 

[Ruby Jack]

How does the ESS work on an auto tranny? I just have to keep my clutch depressed and it won't kick in. Guessing autos need to have brakes depressed for it to kick in?

 

[Sean L]

How does the ESS work on an auto tranny? I just have to keep my clutch depressed and it won't kick in. Guessing autos need to have brakes depressed for it to kick in?

Yes for the automatic transmission for ESS to work it needs to be in Drive and at a full stop with moderate/heavy brake pressure.

 

[Matthew/E36]

It's fun to see how far you can roll up to stopped traffic with the engine off, or time it just right so you never fully stop before the light changes.

No idea how much fuel I'm saving, or not saving.

 

[Capt-Zoom]

Will come on in about a second. I hate it and disable it immediately after starting.

 

[DickZip]

Ess is useless

 

[Rockmaninoff]

I know cranking the engine requires a bit more gas than an idling engine, so if I were to stop for only a second or two and the ESS kicks in, wouldn't that be a net fuel efficiency loss?

How long will I need to be stopped for the ESS' fuel saving to kick in?

Most systems should show how much fuel you've saved. ESS is good in long stops... turn it on only when you think it's good to stop the engine and it'll stop if the vehicle is up for it. When moving again, turn it back off.

It's nightmarish on vehicles that don't allow the disabling of start/stop. If you have to hit the brakes hard and pull off immediately you're in trouble.

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