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Go Back   REVscene Automotive Forum > Technical Discussion > Maintenance, Engine & Driveline Tech

Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..

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Old 05-16-2009, 11:14 AM   #1
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Terrible gas mileage in 96 civic

My gf's 96 civic cx is getting terrible mileage. shes getting just over 250kms a tank and it costs her roughly 40 to fill. I recently changed the plugs, cap, rotor, fuel filter and put on a cold air kit which helped a little bit maybe an extra 25kms a tank.

Im thinking the catalaytic converter is plugged or her fuel pressure regulator has gone south. Anyone have any ideas?

The converter on her car is a one piece design that bolts directly to the cylinder head so checking it would be pretty tough.
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Old 05-16-2009, 11:29 AM   #2
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you can remove the front o2 sensor to have a peek in the converter. If its a higher milage car with original o2 sensor, i would consider replacing the o2 sensor
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Old 05-16-2009, 01:08 PM   #3
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Her O2 sensor needs replacing. I'm almost 99% sure that's what the problem is. If the CAT was clogged you would notice a significant loss in power and you would get smell in the car from the exhaust not venting properly.

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