From what I've read, forced auto stop is a relatively easy installation. I have afew questions regarding this. When you put in in FAS, does the engine light back up, when you take it out of FAS. Also, does it make a big difference. The reason, I'm asking is that on my 17 mile trip home from work I have a 3 mile downhill, I can coast comfortable at 45-50 mph. I figure with the engine idling it uses approx .1 gph. That 3 miles coasting with the engine off whould save me .005 gallons of gas. It does not seem like much, but that .005 gallons would carry me 1/3 of a mile at 75 mpg. This means on my 17 mile trip home, I could get 76.5 mpg instead a measley 75, not to mention many other time FAS could come in handy. Is there a link to this installation. Thanks for any help or advice.
on my 17 mile trip home from work I have a 3 mile downhill, I can coast comfortable at 45-50 mph. I figure with the engine idling it uses approx .1 gph.
I wouldn't assume that. From using my Scangauge, I can tell you that the car shuts off the fuel to the cylinders under those conditions.
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2000 MT #4227 175K miles - Citrus Yellow, BetterBattery
I would not consider the FAS an easy installation. I *did* do the Calpod IMA disable, and would consider that an easy installation, but it still took about one week for me to finish.
This is because the IMA disable switch is now mounted right on the shifter knob and I made a thin-walled fiberglass replica of the shift knob with a *bulge* on the front side to house the dip switch.
The cable runs from the clutch disable switch, behind the dash, down to the floor shifter housing, inside the housing, and into the shifter boot, then up to the shifter ball. In my estimation, the disable mod is well worth the time, and I use all the time.
From looking at an install of FAS, you are ramping up the difficulty at least 5X. But everyone has different viewpoints and you *may* think that a FAS install is relatively easy.
As for finding out how to do it, be diligent in your search on this forum and you will find a link to another website all together that will discuss in nice detail how to do this. The website has the word Clean in it.
I wouldn't assume that. From using my Scangauge, I can tell you that the car shuts off the fuel to the cylinders under those conditions.
With the engine idling, it has to be using fuel. If I was coasting downhill in neutral it would have to be using less fuel with the engine off than on. If I was going downhill with the car in 5th with my foot off the gas, I imagine the fuel would be cut off to the injectors, but the engine braking would kill my momentum.
I thought there was a fuse for the auto stop circuit and by making that circuit go though a switch, you could control it, creating forced auto stop.
Rather than fool around with the 'force auto-stop' mod, why not just turn the key off to stop the motor and then turn it back to the 'on' position while coasting down the hill. This will give you back your lights and power steering. When you want the motor running again you just have to flick the key to 'start' as you normally do.
I don't think that having the car in the 'on' position for a few minutes is going to cause any damage - this is how I read flash error codes as per the Honda service manual.
Using the key avoids any issues that may appear later caused by trying to 'fool' the hardware and/or software or by splicing into the wiring harness.
With the engine idling, it has to be using fuel. If I was coasting downhill in neutral it would have to be using less fuel with the engine off than on. If I was going downhill with the car in 5th with my foot off the gas, I imagine the fuel would be cut off to the injectors, but the engine braking would kill my momentum.
Nope. The Insight will cut the fuel to the injectors completely. The engine will still be turning, but it will not be consuming any fuel. I'm assuming you are going downhill in gear. There will be very little engine braking. Try it. Switch your FCD to metric (L/100km) and you can see the consumption drop to 0. You can't see it as well in MPG because it won't display over 150mpg.
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2000 MT #4227 175K miles - Citrus Yellow, BetterBattery
Nope. The Insight will cut the fuel to the injectors completely. The engine will still be turning, but it will not be consuming any fuel. I'm assuming you are going downhill in gear. There will be very little engine braking. Try it. Switch your FCD to metric (L/100km) and you can see the consumption drop to 0. You can't see it as well in MPG because it won't display over 150mpg.
I agree, but with the engine turning in 5th gear, there's enough compression braking to slow me down. In neutral, I can maintain my pace. I'm going to try that key off and then on again, but I wasn't sure the power steering would still function. I was also wondering with the engine off, how much vacuum reserve is there in the brake booster. I will try it next chance I get.
Nope. The Insight will cut the fuel to the injectors completely. The engine will still be turning, but it will not be consuming any fuel. I'm assuming you are going downhill in gear. There will be very little engine braking.
Agreed, assuming you have a full SoC on the IMA battery, in mine I would get quite significant regen. Although i guess a clutch switch would remedy that.
Id like to get a FAS switch in mine as keyying off kinda kills the FCD for a few seconds and you lose auto restart when you select a gear (convinent) and auto start when brake boost gets low (IMPORTANT)
I agree, but with the engine turning in 5th gear, there's enough compression braking to slow me down. In neutral, I can maintain my pace. I'm going to try that key off and then on again, but I wasn't sure the power steering would still function. I was also wondering with the engine off, how much vacuum reserve is there in the brake booster. I will try it next chance I get.
If you are trying to be that frugal, why not kick it up a couple dozen notches and get a MIMA. Mike has them with FAS built in, and the TPS mod as well. What you'll save by FAS is peanuts compared to what you'll save with a MIMA.
This was a recent short trip on a warm day:
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2000 MT #4227 175K miles - Citrus Yellow, BetterBattery
Based on my experience of embarrassing myself at a stop light several weeks ago, I would go for the full FAS as well.
It was a Friday night and was rolling slowly up to a stop light known for long timing intervals. Performed a *keyed* engine stall and waited for the light to turn green. When it was time to go, I put the gear in first and started to let out the clutch, .... and nothing!!
What I forgot was the car did exactly what it was supposed to do. The only way to get the engine going again after a *keyed* FAS was to start it with... the key!!
Fortunately no one got mad behind me during the few seconds it took to figure out what happened.
If I have any intentions of doing FAS's on a regular basis, I will definitely do the full Forced Auto Stall treatment. By going that route, to get the engine started again, just put the transmission in gear and away you go.
Going the *keyed* route will just give me another chance to embarrass myself.
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Forced Auto Stop
