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Honda D17 poor fuel consumption


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mohsin1122
Novice

Dec 24, 2016, 9:52 AM

Post #1 of 4 (1182 views)
Honda D17 poor fuel consumption Sign In

I am using honda city 1998 and engine is swapped with D17a vtec but it gives me fuel economy of 7.8 on local and 9 on long
I try changing fuel injectors and MAP sensor but still no luck
Kindly suggest some solution
Also
Plz tell me if fuel economy has something to do with down pipe as i am still using the one i used in D15


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Dec 24, 2016, 10:02 AM

Post #2 of 4 (1176 views)
Re: Honda D17 poor fuel consumption Sign In

Hello here too. We know this vehicle has been altered so plenty could be at fault for assorted things.
For fuel (petrol=gas) how are you measuring? Miles or kilometers and per gallon or liter? The other way is how many liters per 100 KM and I personally can't think that way of measuring fuel use normal or what - just me.


If you are speaking as miles per liter that's about what I'd expect out of a small Honda so wouldn't be looking for a problem.


Basics - when an engine is seriously using too much fuel you usually get an odor out the tailpipe and about none of these make any at all by assorted makers around that model year or even lots older,


T



mohsin1122
Novice

Dec 24, 2016, 10:14 AM

Post #3 of 4 (1171 views)
Re: Honda D17 poor fuel consumption Sign In

i am measuring in Kilometer per liter.
almost 10 liter per 100 km on motorway on avg. speed of 120 km/h


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Dec 24, 2016, 10:43 AM

Post #4 of 4 (1164 views)
Re: Honda D17 poor fuel consumption Sign In

You are testing my use of a calculator! Sorry - once permenantly non metric and older this method is both sideways and backwards to me.


Roughly I come up with highway speeds you are getting about 23 MPG = "Miles Per Gallon" which is low for about any Honda car at a speed of about 75 MPH just might be pushing this thing?


The issue of whatever way you measure fuel use is so dependent on how you actually drive, road conditions, weather a factor, how full from each time you measured to how full again so average out over a couple times. You must have noticed in filling tank that you can force more in or quit when pumps shut off by themselves? That for one check will throw off the observation if just once but a lot.


Not sure what to do for you? You could look at spark plugs and see if they show excessive fuel unburned evidence or odor as mentioned out tail pipe.


Other is this is still leaking some or maybe your source for fuel isn't accurate mean possible the place is cheating on amount sold?


I can't be certain this isn't now normal for the engine you have and the way it's being driven so at a loss. If this run very well, no complaints and smooth as can be and expect you might have to settle for this.


Try an alternate place to buy fuel and see if that changes anything if running properly for that speed it possible that's all you'll get for you specific use of this car which I can't know all the conditions it's exposed to.


Things that help: Proper tire pressure, Gentle driving and not changing speeds quickly. Avoid abrupt stopping. If a standard shift don't use engine to slow down, rather coast ahead of time.


This is a common complaint folks have about vehicles that may have said what to expect for consumption and never see that for themselves so puts me at a loss. You almost would have to compare this vehicle with an exact duplicate vehicle under all the same conditions to know if this is too much or normal for it?


T







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