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Old 14th October 2014, 22:20   #1786
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Originally Posted by t3ofil4us View Post
Any idea on how a bust O2 sensor affects the mileage? Does it drop drastically to like say 5-6 kmpl?
Taken from Wikipedia:

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Since oxygen sensors are located in the exhaust stream, they do not directly measure the air or the fuel entering the engine.

The sensor does not actually measure oxygen concentration, but rather the difference between the amount of oxygen in the exhaust gas and the amount of oxygen in air.
If it is a bust sensor the data going to ECU will not be correct hence it will be feeding incorrect fuel to the engine hence lower FE. It is just not an O2 sensor that controls FE but diving style, air filter condition.

Anurag.
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Old 14th October 2014, 22:26   #1787
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

@a4anurag Thanks Mate!! Had a niggling doubt that the exhaust pipe or the air filter may be the culprit but this means I have work to do. And Just after I got the TB assembly replaced. The Air filter is in bad condition and I drive pretty relaxed, upshifts between 2200-2500 and downshift below 1500 RPM. Will replace the air filter and the O2, let me see if that makes a difference.

No matter how much trouble the OHC causes, I have never experienced better driveability in any other Indian made cars(Maruti/TATA). Even New cars have a feeling of disconnect. The OHC with the hydraulic assist makes me feel connected to the road. Absolutely loved every single drive. What about the others? what do you love most about your OHC.

Last edited by t3ofil4us : 14th October 2014 at 22:30. Reason: Added a few more words
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Old 15th October 2014, 10:07   #1788
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

I have a silver Vtec and I just love the way I looks. The spoiler is a piece of art!

Does anyone have an idea on the maximum fuel economy of OHC VTEC? I'm driving with a very light foot with up shifts at 1500-2000 RPM. I'm also coasting in neutral regularly on flat stretches of road. I'm getting around 11-12 kmpl. Is that normal or should I be concerned?
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Old 15th October 2014, 12:41   #1789
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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I have a silver Vtec and I just love the way I looks. The spoiler is a piece of art!
I have a Heather Mist Vtec and yes we all love the OHC. It still is a stunner, lookwise as well as performance wise.

As for the fuel efficiency, I am getting same figures as to what you are getting. 11-12 in city. Haven't done highway runs since a long time. And I also dont think coasting can help increase your FE. I always feel that it can ruin your gear box.
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Old 15th October 2014, 13:12   #1790
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Originally Posted by bowser View Post
I'm also coasting in neutral regularly on flat stretches of road. I'm getting around 11-12 kmpl. Is that normal or should I be concerned?

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Originally Posted by KaandBaaz View Post
And I also dont think coasting can help increase your FE. I always feel that it can ruin your gear box.
The OHC is really a great car. The real Honda DNA is in there & the performance shows that. My dream car as a young boy I was back then.

However, why do you think that coasting in gear would ruin your gearbox? The only stress I feel gearboxes & drivetrain would take is in cases of sudden engine braking, and probably that too is debatable. The OHC is an older car so I am not sure that if 'DFCO' concept is implied or not, but even if not, coasting in gear has a lot of advantages and is much safer than to coast in neutral.

Regards,
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Old 16th October 2014, 09:59   #1791
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Originally Posted by KaandBaaz View Post
I have a Heather Mist Vtec and yes we all love the OHC. It still is a stunner, lookwise as well as performance wise.

As for the fuel efficiency, I am getting same figures as to what you are getting. 11-12 in city. Haven't done highway runs since a long time. And I also dont think coasting can help increase your FE. I always feel that it can ruin your gear box.
What color is heather mist? Is it a light gold? I think mine is called Satin Silver.

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Originally Posted by saket77 View Post
The OHC is really a great car. The real Honda DNA is in there & the performance shows that. My dream car as a young boy I was back then.

However, why do you think that coasting in gear would ruin your gearbox? The only stress I feel gearboxes & drivetrain would take is in cases of sudden engine braking, and probably that too is debatable. The OHC is an older car so I am not sure that if 'DFCO' concept is implied or not, but even if not, coasting in gear has a lot of advantages and is much safer than to coast in neutral.

Regards,
Saket
I think no fuel will be injected when coasting in gear right? But it quickly slows down the car because of the resistance. Coasting in neutral takes you much farther and if there is a slight downward slope it justs keeps going. What's the disadvantage of coasting in neutral?

Also, is there some kind of shift lock built in to the OHC? I can easily shift to 1st gear when at a standstill or JUST barely moving but once it picks up speed I can't go back to 1st. Similarly with the 2nd gear, once I'm past 20 kmph there is a stiff resistance when trying to engage the 2nd gear. It's as if the gear you are supposed to be in at a certain speed offers least resistance. 3rd, 4th, and 5th don't seem to have this "lock". Mine is a June 2003 Vtec if that helps.
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Old 16th October 2014, 10:10   #1792
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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I think no fuel will be injected when coasting in gear right?
No or minimal fuel I would say, depending on the ECU programming.

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But it quickly slows down the car because of the resistance. Coasting in neutral takes you much farther and if there is a slight downward slope it justs keeps going. What's the disadvantage of coasting in neutral?
Though you are dismissing the very advantage, but engine braking is the main advantage of coasting in gear. You are in more control, can accelerate immediately if the need arises, put less stress on brake pads when coasting in gear. I think there are a couple of threads on the topic. We can continue the discussion as well.

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Originally Posted by bowser View Post
Also, is there some kind of shift lock built in to the OHC? I can easily shift to 1st gear when at a standstill or JUST barely moving but once it picks up speed I can't go back to 1st. Similarly with the 2nd gear, once I'm past 20 kmph there is a stiff resistance when trying to engage the 2nd gear. It's as if the gear you are supposed to be in at a certain speed offers least resistance. 3rd, 4th, and 5th don't seem to have this "lock". Mine is a June 2003 Vtec if that helps.
Should be the synchronizer rings.
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Old 16th October 2014, 10:35   #1793
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Though you are dismissing the very advantage, but engine braking is the main advantage of coasting in gear. You are in more control, can accelerate immediately if the need arises, put less stress on brake pads when coasting in gear. I think there are a couple of threads on the topic. We can continue the discussion as well.
But is there a specific disadvantage to coasting in neutral? Any effect on the gearbox or something similar?

Also, is there stress on the engine when using engine braking? I would much rather put stress on the brake pads than on the engine. Brake pads are easily replaceable, engine is not

That being said, I am no car expert so please let me know if I am missing something.
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Old 16th October 2014, 10:56   #1794
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Originally Posted by bowser View Post
But is there a specific disadvantage to coasting in neutral? Any effect on the gearbox or something similar?

Also, is there stress on the engine when using engine braking? I would much rather put stress on the brake pads than on the engine. Brake pads are easily replaceable, engine is not
No problems whatsoever to the engine or drivetrain while coasting in a gear. However, using sudden engine braking at high speed with lower gears like putting the car in 2nd geat at 80 KMPH can put the drivetrain under stress as per my understanding. Even this is debatable.

The specific problems that I can come up with coasting in neutral is:

1. You burn more fuel,
2. You cannot accelerate if the need arises during a maneuver; in short, it increases the time taken to react to an emergency situation.
3. You put a lot more stress on brakes in absence of engine braking,
4. Frequently using brakes, like that on a downhill can heat up the pads to an extent where they might fail completely; a phenomena called brake fading.
5. In case the engine stalls somehow, you won't have vacuum for brake assist. Not a nice situation to be in. If the engine stalls while coasting in a gear, you will not lose the brakes.

The only advantage you may think of by coasting in neutral is that because there is no engine braking, you can travel more distance while coasting. But still you are burning fuel at the rate of idling engine. While coasting in gear, there is very low fuel being burnt and that is also an added advantage.

You may look at this thread specific to the discussion:
http://www.team-bhp.com/forum/techni...save-fuel.html (Does coasting save fuel?)

Regards,
Saket
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Old 16th October 2014, 11:17   #1795
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Originally Posted by bowser View Post
Also, is there some kind of shift lock built in to the OHC? I can easily shift to 1st gear when at a standstill or JUST barely moving but once it picks up speed I can't go back to 1st. Similarly with the 2nd gear, once I'm past 20 kmph there is a stiff resistance when trying to engage the 2nd gear. It's as if the gear you are supposed to be in at a certain speed offers least resistance. 3rd, 4th, and 5th don't seem to have this "lock". Mine is a June 2003 Vtec if that helps.
There is no gear lock or anything of that kind. All you need to do is to try downshifting while rev matching!

I have on various occasions shifted into 1st gear at a speed of 30kmph from 2nd. All you need to do is to rev match.

Check this out!



Hope it helps!

Last edited by ssjr0498 : 16th October 2014 at 11:26.
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Old 16th October 2014, 12:46   #1796
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

Hi Can anyone from delhi please advice as to where can one source an o2 sensor for the 1.5 ohc and how much would it cost???
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Old 16th October 2014, 21:24   #1797
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Originally Posted by saket77 View Post
No problems whatsoever to the engine or drivetrain while coasting in a gear. However, using sudden engine braking at high speed with lower gears like putting the car in 2nd geat at 80 KMPH can put the drivetrain under stress as per my understanding. Even this is debatable.

The specific problems that I can come up with coasting in neutral is:

1. You burn more fuel,
2. You cannot accelerate if the need arises during a maneuver; in short, it increases the time taken to react to an emergency situation.
3. You put a lot more stress on brakes in absence of engine braking,
4. Frequently using brakes, like that on a downhill can heat up the pads to an extent where they might fail completely; a phenomena called brake fading.
5. In case the engine stalls somehow, you won't have vacuum for brake assist. Not a nice situation to be in. If the engine stalls while coasting in a gear, you will not lose the brakes.

The only advantage you may think of by coasting in neutral is that because there is no engine braking, you can travel more distance while coasting. But still you are burning fuel at the rate of idling engine. While coasting in gear, there is very low fuel being burnt and that is also an added advantage.

You may look at this thread specific to the discussion:
http://www.team-bhp.com/forum/techni...save-fuel.html (Does coasting save fuel?)

Regards,
Saket
That's some great info, thanks!
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Old 18th October 2014, 14:57   #1798
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

Wow, great to see this thread still alive and kicking! it's been a while since I was active on this one, but being a new joiner to the fathers club means free time just goes out the window :P

And with that comes change.. I'm officially bidding goodbye to my blue bombshell soon so I doubt I'll have much more to chip in with on this thread.. & I've already put her up for sale but nevertheless wanted to thank all you guys here for all the great support & resolutions that were shared!

Quick shout to all the OHC fans here.. Frontosa/Ryan_Wheelz/Desmosedici/KSM-Vtec and all the others i may have missed out on.

Now starts my hunt for a replacement.. and I already have a feeling, it's going to be a long hard one.

cya guys around!
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Old 20th October 2014, 10:13   #1799
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Wow, great to see this thread still alive and kicking! it's been a while since I was active on this one, but being a new joiner to the fathers club means free time just goes out the window :P

And with that comes change.. I'm officially bidding goodbye to my blue bombshell soon so I doubt I'll have much more to chip in with on this thread.. & I've already put her up for sale but nevertheless wanted to thank all you guys here for all the great support & resolutions that were shared!

Quick shout to all the OHC fans here.. Frontosa/Ryan_Wheelz/Desmosedici/KSM-Vtec and all the others i may have missed out on.

Now starts my hunt for a replacement.. and I already have a feeling, it's going to be a long hard one.

cya guys around!
Its always sad to let go of your precious machine. How about some parting pics?

Does anyone know what kind of OBD port the OHC has? I would like to buy a budget OBD scanner to read and clear codes. It should also be able to do soft and hard resets. I'm open to buying a used one if anyone wants to sell.

Last edited by bowser : 20th October 2014 at 10:14.
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Old 20th October 2014, 10:27   #1800
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Default Re: 1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more

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Its always sad to let go of your precious machine. How about some parting pics?

Does anyone know what kind of OBD port the OHC has? I would like to buy a budget OBD scanner to read and clear codes. It should also be able to do soft and hard resets. I'm open to buying a used one if anyone wants to sell.
I have a few pics for the listing but i will take the last ones before i let go of her keys for sure.

The OHC has a standard OBD-II port. I had my OHC scanned once to sort an issue with the engine setting.. if you can check one of my older posts on this thread, i even mentioned which scanner was used by my mechanic to check it.

http://www.team-bhp.com/forum/techni...ml#post3100042 (1st Gen Honda City Owners - Problems Areas, Fuel Efficiency and more)

But i guess this was a professional one. Not sure which one is the most popular one for enthusiasts to get to do their own checks/resets.
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