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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 01-18-2011, 07:36 AM   #1
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terrible fuel mileage

so heres the issue. i have a 1996 integra rs coupe.

my car is sucking back gas like its a v8. i last filled up my car and i have about 1/8 of a tank left and ive only gone 300km. ive owned the car for a year and i used to get 400-450km if i was lucky. i dont drive hard at all. the only thing i have done to my car is a short ram intake.

my car isnt throwing any cel's. any ideas would be really helpful.

p.s. its a b18b
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Old 01-18-2011, 07:38 AM   #2
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i got same problem on my 97 gsr =[
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Old 01-18-2011, 08:36 AM   #3
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i checked to see if im throwing any cel's last night. im fine there. so im gonna replace the fuel filter and give it a tune up. and if the problem persists im gonna start looking for leaks
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Old 01-18-2011, 02:55 PM   #4
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just a thought i'll throw out, sometimes it might be a failing o2 sensor.
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Old 01-18-2011, 03:36 PM   #5
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if it was a o2 sensor wouldnt i be throwing codes when i checked my cel
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Old 01-18-2011, 03:42 PM   #6
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i had that problem with my 98 EL, had it tuned up(distributer,rotor, spark plugs, fuel filter) and my mileage jumped back up to 500+km before the light turns on.
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Old 01-18-2011, 03:49 PM   #7
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thanks for all the help guys. last time i checked my plugs all that stuff it was august/sept. i guess i'll do the tune up and replace the fuel filter
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Old 01-18-2011, 08:35 PM   #8
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Quote:
Originally Posted by bigpun1 View Post
if it was a o2 sensor wouldnt i be throwing codes when i checked my cel
not necessarily, a "lazy" 02 often doesn't set a dtc
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Old 01-19-2011, 10:10 AM   #9
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if it was a o2 sensor wouldnt i be throwing codes when i checked my cel
I had a bad O2 sensor in a few of my cars i've driven that didn't trip any CELs and my car didn't throw any codes either (good thing I have a mechanic friend I can learn off of). Took it out, replaced it and mileage went back up to normal.

I've learned not to trust the ecu completely when it doesn't complain at all. It's like one of those silent bitches that holds all the bad things in and explodes when it can't take anymore. If it throws a code, something is already wrong at that instant, it usually won't give you a heads up on something that's starting to fail or gets clogged. ECU will simply compensate.
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Old 01-24-2011, 02:26 AM   #10
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I have never had an o2 sensor trip a tdc on any of my vehicles. I could always tell when it was time to replace them when i started running pig rich.
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