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sudden drop in MPG in 92 Geo Metro?
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richard123
New User
Jul 22, 2011, 12:01 PM
Post #1 of 2
(1965 views)
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sudden drop in MPG in 92 Geo Metro?
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This is a 3 cyl engine. Car has consistently gotten 35-36 mpg. I took it on a longer trip ( about 200 miles) and got 39. The very next tank mpg dropped to 27-28. The air filter is new. The EGR valve is working. It moves on acceleration and also I removed it and verifiied both pressure and vacuum with it removed. I also test the oxygen sensor and it was varying up and down as it should. I can not say whether the speed is normal or not. I don't want to replace anything unnecessarily. I also looked around for loose wires or leaky hoses and found nothing. I want my old mileage back. Just when gas prices dropped a little my cost went up. Car drives perfectly normal. What are likely bets.
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Mr.scotty
Enthusiast
Jul 22, 2011, 3:50 PM
Post #2 of 2
(1955 views)
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Re: sudden drop in MPG in 92 Geo Metro?
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No check engine light right?
Has it had a full maintenance service done in the past 15-25,000 miles?
Have you checked your tire pressure?
Buying gas at a different place?
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Your only as good as your tools!
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