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-   -   EOC Pulse & Glide? (https://www.fuelly.com/forums/f8/eoc-pulse-and-glide-8961.html)

atomicradish 06-14-2008 07:10 PM

EOC Pulse & Glide?
 
Perhaps this is a tad too much stress on the starter, but I was wondering if anyone does EOC P&G - that is, turning the engine off after accelerating above the speed limit and then coasting.

It seems like it might be a little much, though effective if you could sustain your coast over a long period. When I P&G over my 6 hour drive, I usually use a 20 mph window between my maximum and minimum speeds. Would you have to use a larger window for this to be effective?

Just curious. I doubt I will be testing this or anything. P&G itself is a lot of work, especially on arduous interstate trips.

theholycow 06-15-2008 04:27 AM

There's quite a few folks here who do it. I have experimented with it lately and it is rather fun. If I restart with the starter, my car makes three long error beeps that are far different from any seatbelt warning or other chimes it normally does, so I don't do that. Bump-starting seems to be the preferred restart method, and that seems to be free of consequences in my car, though I've only tried it maybe 10 times as of yet.

Karishnikov 06-15-2008 02:53 PM

I don't know why VW includes those beeps, but my wife's 2002 Passat does the same thing. I EOC through the beeping.

theholycow 06-16-2008 09:06 AM

You're the first person who is familiar with the beeps! Hooray, I found someone! I have a video if you don't mind confirming that we're talking about the same beep pattern, though I doubt it could be any different.
https://video.google.com/videoplay?do...49193589067552

Anyway, has it ever thrown any OBD codes or set the CEL about it? Mine's a lease and under warranty, and I'm afraid to do anything that might make them think I'm doing weird stuff...but somehow bump starting seems not to cause any complaint from the car.

ShadowWorks 06-16-2008 09:50 AM

Now that I have learned these tricks I have started to shut my engine off as I come to a set of red lights, or if I am coming down a long gradient, I start the engine by letting the clutch out in the tallest gear I can get away with so the car does not jerk.

I didn't realise how long I spent in traffic just wasting fuel, now that I shut the engine down time goes by much faster :)

KARR 06-16-2008 01:58 PM

Quote:

Originally Posted by ShadowWorks (Post 106181)
Now that I have learned these tricks I have started to shut my engine off as I come to a set of red lights, or if I am coming down a long gradient, I start the engine by letting the clutch out in the tallest gear I can get away with so the car does not jerk.

I didn't realise how long I spent in traffic just wasting fuel, now that I shut the engine down time goes by much faster :)

You start the engine with the clutch in a high gear? Wouldn't this cause damage to the clutch/transmission?

atomicradish 06-16-2008 03:43 PM

Quote:

Originally Posted by KARR (Post 106234)
You start the engine with the clutch in a high gear? Wouldn't this cause damage to the clutch/transmission?

Why would it?

I always start my car out in whatever gear is speed appropriate. If that's 5th gear then I start it in 5th.

ShadowWorks 06-16-2008 05:06 PM

Quote:

Originally Posted by KARR (Post 106234)
You start the engine with the clutch in a high gear? Wouldn't this cause damage to the clutch/transmission?

Not at all, everything inside the gear box is spinning when the wheels are connected to the ground and turning, so there is no heavy back lash on the gears and I am basically using my speed to start the engine instead of the electrical starter motor.

Starting the car is very smooth in the right gear because the clutch will allow you to start the car softly, only a soft drop in speed is noticed which is used to start the engine, a car moving at 30mph has much energy as in inertia over a car moving at say 10mph, not 3 times more energy but something like 12 times more energy, maybe even more.

Karishnikov 06-16-2008 05:30 PM

Quote:

Originally Posted by theholycow (Post 106162)
You're the first person who is familiar with the beeps! Hooray, I found someone! I have a video if you don't mind confirming that we're talking about the same beep pattern, though I doubt it could be any different.
https://video.google.com/videoplay?do...49193589067552

Anyway, has it ever thrown any OBD codes or set the CEL about it? Mine's a lease and under warranty, and I'm afraid to do anything that might make them think I'm doing weird stuff...but somehow bump starting seems not to cause any complaint from the car.

Yeah, I've seen your video before. It's the same beep pattern. I've been doing it for the last three months on my wife's car and I've encountered no negative side effects thus far.

Just googled Volkswagen EOC and three beeps and found nothing except our posts on this forum. Will keep looking.

theholycow 06-17-2008 05:26 AM

I asked on golfmkv.com but nobody knew, and most people were more interested in lambasting me for EOC.

ShadowWorks 06-17-2008 05:32 AM

Quote:

Originally Posted by theholycow (Post 106371)
I asked on golfmkv.com but nobody knew, and most people were more interested in lambasting me for EOC.


Most car forums are like frat boy fraternities, only interested in being one of the boys, anybody who stands out gets singled out, be thankful your not one of those goons.

KARR 06-17-2008 08:16 AM

Always learning. Thank you. I'll try it soon!

ShadowWorks 06-17-2008 11:26 AM

Quote:

Originally Posted by KARR (Post 106404)
Always learning

Me too;)

Karishnikov 06-21-2008 02:32 PM

Quote:

Originally Posted by theholycow (Post 106371)
I asked on golfmkv.com but nobody knew, and most people were more interested in lambasting me for EOC.

Out of curiousity, I re-read my VW manual and it said that EOC will potentially cause damage to the transmission, due to lack of lubrication, so I've decided that I will no longer EOC with the Passat. Luckily, it's not my daily driver so I can still get good FE with my Tercel.

Anyway, you might want to check out your owner's manual and see what it says about towing your Rabbit.

theholycow 06-21-2008 02:44 PM

Is yours automatic or manual?

I'm pretty sure that it's ok with a manual regardless of whatever the manual says. I'll have to look at the owner's manual again, but I think I'll keep doing it regardless of what it says.

The golfmkv.com users were concerned not about the longevity of my transmission, but rather because they assumed I was going to hurt someone due to lack of power steering (they forgot that the car has electric power steering), brakes (besides the 3-5 brake uses I have in retained pressure, I'm strong enough to stop well with manual brakes), acceleration (nobody told me exactly how it would help), and children (the places where I EOC are in the middle of a forest with no pedestrian access, far from civilization, with no other traffic).

ShadowWorks 06-21-2008 02:48 PM

Quote:

Originally Posted by Karishnikov (Post 107424)
Out of curiousity, I re-read my VW manual and it said that EOC will potentially cause damage to the transmission, due to lack of lubrication.

I am not sure how the VW transmission works but if its like most of the gearboxes I have opened it will get lubrications when ever the wheels turn, remember the drive shafts never stop which are connected to differential which is in submerged in part of the oil, the oil climbs up the gears and is spun around coating everything in oil.

Karishnikov 06-22-2008 04:59 PM

According to VW, the automatic transmission does not receive proper lubrication with the engine off. This is based solely on what I read in the owner's manual. I would be glad disregard it if I had evidence to the contrary, but I'd rather be cautious with that car since I'm still paying for it.

Made a trip today without using EOC, but still using EOI and I saw about a 4 mpg drop from 30 to 26 on 45 mph roads with a stoplight every mile for 20 miles. Since we drive that car less than my Tercel, the drop in FE doesn't hurt the pocketbook too much.

theholycow 06-22-2008 05:03 PM

I didn't realize that we were talking about automatics. My VW has a manual transmission.

Most automatics are NOT equipped for EOC.


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