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Sudden drop in gas mileage S90-V90

posted by  poolman on  Tue Nov 22 01:10 CST 2005
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last visit: Sun Dec 26 02:03 CST 2010
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There could be a number of things that could cause the increase in fuel consumption,you stated that you just had a timing belt change. How is the power in the vehicle-is it as strong as before-does it climb hills well.
I'm wondering if your mechanic has the belt dead on time like it should be-I once had an indy put mine on and it was off by a tooth and a half on the exhaust side.
It's not much trouble to take the belt cover off and check these things.
This is the first thing that came to mind-may be okay though, replace your ends on your vacuum hard lines and check for leaks-a vacuum line leaking will cause havoc with fuel mileage. While your at it take the vacuum tree off the manifold,held on with a 10mm bolt,then change the O ring that is there.
I don't know how many miles you have on your O2 sensor but it could possibly have gotten week and start causing you mileage-but with what you have stated I would look at the first two points I brought up first.
Hope that helps
Poolman






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