Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - EOCing while in gear causes rough running

pete c · 08-08-2015, 11:02 PM

I do a good bit of EOCing. Not much of a point to leave the ignition off though, when using the engine as a brake, or just to get my power brake vacuum back. So, I have had no issues doing it with my '05 focus ZX-3.

But, the other day, I had to drive to New Bedford, MA for work. I decided to leave the ignition off, even while engine braking, just to see how short I could make the nearly hundred mile drive. I take 44/101. This is a great 2 lane state highway for getting mileage. Lots of long downhills/uphills. After a long downhill, ignition off, in gear for engine braking, I found that I would have a low rpm stutter. It would clear its throat after about 5 miles. I repeated this a number of times and each time, the same thing.

Anyone else experience this? I have decided to stop EOCing in gear for now.

One of the reasons I did this was that I had heard a while back, that CT is looking at going to miles driven as a means to collect tax. If they carry through with this, I will be one EOCing mofo.

BTW, I was able to do the near hundred mile drive in about 70 "miles". With more effort, and lighter traffic, I think I could get it down to 50 miles.

08-08-2015, 11:02 PM	#1 (permalink)
pete c Master EcoModder Join Date: Oct 2011 Location: ellington, ct Posts: 830 Thanks: 44 Thanked 104 Times in 80 Posts	EOCing while in gear causes rough running I do a good bit of EOCing. Not much of a point to leave the ignition off though, when using the engine as a brake, or just to get my power brake vacuum back. So, I have had no issues doing it with my '05 focus ZX-3. But, the other day, I had to drive to New Bedford, MA for work. I decided to leave the ignition off, even while engine braking, just to see how short I could make the nearly hundred mile drive. I take 44/101. This is a great 2 lane state highway for getting mileage. Lots of long downhills/uphills. After a long downhill, ignition off, in gear for engine braking, I found that I would have a low rpm stutter. It would clear its throat after about 5 miles. I repeated this a number of times and each time, the same thing. Anyone else experience this? I have decided to stop EOCing in gear for now. One of the reasons I did this was that I had heard a while back, that CT is looking at going to miles driven as a means to collect tax. If they carry through with this, I will be one EOCing mofo. BTW, I was able to do the near hundred mile drive in about 70 "miles". With more effort, and lighter traffic, I think I could get it down to 50 miles.