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1993 Prelude fuel economy problems

I started having this problem quite a while ago. Now, since it got cold outside it became even worse. I am getting at least 30% drop in my MPG. On average I got about 24 MPG during normal highway and city driving. Now i get about 17 MPG. Recently I did full maintance on it. I have changed timing belt, spark plugs, wires etc. I have not noticed any changes in the fuel economy before and after my car got repaired. My check engine light is off. In the morning car starts normally.

What should I check? Please advise. Thanks

1993 Prelude 4WS 2.3L engine 175K miles manual
Reply to
vkutsevich
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If you're in Alaska, it might be normal. Are you warming it up according to the owner's manual?

'Curly'

Reply to
motsco_

I am in VA. Every morning I warm up my car for about 2-3 min and then drive slowly until engine reaches the normal temperature.

Reply to
vkutsevich

Consider everything listed at

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Take seriously the counsel to use OEM for certain parts.

I'd probably replace the PCV valve first.

Reply to
Elle

snipped-for-privacy@gmail.com wrote in news: snipped-for-privacy@l53g2000cwa.googlegroups.com:

Air filter?

Fuel mileage typically drops in winter temps. Northern gas stations change their fuel mixtures in winter,too.

are you keeping your tires inflated properly?

you could also need a tranny fluid replacement. Are you using the right engine oil grade? like a 5W30 if that's what's called for for your model.

maybe a lazy O2 sensor? they can get "lazy" and not trigger a "check engine" light. They supposedly are only good for around 60-100K miles. OEM sensors are best.

Reply to
Jim Yanik

Thanks for the tips guys!

innews: snipped-for-privacy@l53g2000cwa.googlegroups.com:

Reply to
vkutsevich

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