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Old 07-27-2009, 12:07 AM   #1 (permalink)
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CRX - '90 Honda CRX HF
90 day: 34.15 mpg (US)
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All Stock 1990 CRX HF only getting 33mpg :(((

I dont know what is going on for it to have such bad fuel economy since its supposed to get upper 40s AT LEAST. What are the main things that could cause this? Its not my driving since i have a 92 civic CX and i drive conservatively the same way in it and still get over 45mpg. Just tell me what to do

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Old 07-27-2009, 12:20 AM   #2 (permalink)
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Vegan Powa! - '91 Honda CRX DX
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90 day: 66.52 mpg (US)
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Sounds like something is wrong. Do a leakdown test on the engine. I got similar mileage to that with a similar engine when I had a warped head and was burning through coolant and oil constantly.
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Old 07-27-2009, 01:12 PM   #3 (permalink)
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Civics Lesson - '08 Honda Civic LX
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90 day: 40.53 mpg (US)
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You can check the tire pressure too.
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Old 07-27-2009, 06:45 PM   #4 (permalink)
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Are the HFs carb or FI? Could be leaking carb or fuel injector, depending which.
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Old 07-28-2009, 07:36 PM   #5 (permalink)
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Up through 87 the HF was carbureted, for 1988 and later all US-bound CRXes were fuel injected. The HF (and the Si) used regular multi-point fuel injection, with one injector per cylinder.

-soD

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