Hybrid Engine/IMA battery system The hybrid have a very different engine and Battery system (IMA), so this forum is for items related to the Hybrid cars alone. If they are same as the regular cars, please post there instead.

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Old Mar 27, 2021
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MPG

Hi, curlywurly. I inherited my '03 HCH with the CVT about 10 months ago. After replacing the fuel pump and clearing some codes, it has been good.

I have about 159K on it now. I can't get above 37.4 MPG. I seem to remember reading somewhere that the PCV valve is very important when it comes to MPG. Have you replaced yours yet?

Thanks!



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Old Mar 27, 2021
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Re: New 2003 HCH owner

Originally Posted by CivicHybrid03
Hi, curlywurly. I inherited my '03 HCH with the CVT about 10 months ago. After replacing the fuel pump and clearing some codes, it has been good.

I have about 159K on it now. I can't get above 37.4 MPG. I seem to remember reading somewhere that the PCV valve is very important when it comes to MPG. Have you replaced yours yet?

Thanks!
Keep in mind that the manual transmission gets better fuel economy than the CVT will. The difference you guys are measuring is similar to what Honda claimed from factory.
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Old Mar 28, 2021
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Re: MPG

Hi CivicHybrid03.

I'm no expert that's for sure, I'll try and beak down my mpg usage, mine is a manual though.

City driving, lots of stops lights, every mile, for say 10 miles, 4 people in the car, I get 38 -41
Urban driving, just me, not quite so many stop lights, I get 41-43
Highway driving, just me, I get 43-48.

The engine is quite a complicated in this car, luckily, apart from a few sensor issues, mine runs like a top, not bad at 316,500 miles!

So, if you have an auto and how it's being driven, 37.4 might be normal - do you have a CEL or codes being thrown?

If you are driving on the flat, for 8-10 miles with only you in it, the 37.4 you are getting does seem a little low, I had issues with the brakes, I would get the car up in the air and see if the wheel spin freely as a first step.



Last edited by curlywurly; Mar 28, 2021 at 05:42 PM.
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Old Apr 2, 2021
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Re: MPG

PVC valve, if nothing else take it out soak it in some carb cleaner and clean out the hose. Blow it out with compressed air and reinstall.
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Old Apr 15, 2021
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Re: MPG

Originally Posted by curlywurly
Hi CivicHybrid03.

I'm no expert that's for sure, I'll try and beak down my mpg usage, mine is a manual though.

City driving, lots of stops lights, every mile, for say 10 miles, 4 people in the car, I get 38 -41
Urban driving, just me, not quite so many stop lights, I get 41-43
Highway driving, just me, I get 43-48.

The engine is quite a complicated in this car, luckily, apart from a few sensor issues, mine runs like a top, not bad at 316,500 miles!

So, if you have an auto and how it's being driven, 37.4 might be normal - do you have a CEL or codes being thrown?

If you are driving on the flat, for 8-10 miles with only you in it, the 37.4 you are getting does seem a little low, I had issues with the brakes, I would get the car up in the air and see if the wheel spin freely as a first step.
No CEL or codes.

I forgot to mention that most of my driving is city, by myself, hardly any hwy, so I guess 37.4 is about right.

Thanks!
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Old Apr 15, 2021
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Re: MPG

Originally Posted by digger
PVC valve, if nothing else take it out soak it in some carb cleaner and clean out the hose. Blow it out with compressed air and reinstall.
Thanks. I've been playing with cars for over 40 years, so I know about cleaning PCVs.

I have a new one, so now that the weather's nice, I'll be playing with all this stuff soon. New plugs, etc.

I appreciate the help, gents. .
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