GAS milage problem!

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Mar 22, 2011 | 01:30 AM

01transampower

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From: CO

GAS milage problem!

Well I have an air/fuel ratio gauge and its one of those splice in ones. Yeah yeah i know i sound cheap and yes i will get the right one but i can buy go fast parts for what i would spend on a gauge. Well i looked in my repair book to figure out which wire to splice to and im pretty sure it was suppose to be the purple one. Well now the gauge needle bounces around so its not spliced properly as well as.

So I have no idea what to do. But now my gas milage has gone to ****. Could I of screwed up my O2 sensor? I'm assuming this is the problem. Any suggestions?

Mar 22, 2011 | 07:31 AM

RARON455

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From: Fort Worth Texas

Is the ses light coming on?

Mar 22, 2011 | 08:59 AM

boostedbird38

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From: Sumter, SC

if you got a narrow band a/f gauge hooked up, its supposed to jump all over the place while the engine is running.

those narrowbands only read from 0.1V to 1.0V your pcm is constantly changing fuel delivery based on readings from the MAF and the O2's. so the gauge is going to bounch around.

when you floor it, the gauge should peg all way to the 'rich' side. thats the only "real" reading you're gonna get.

Mar 22, 2011 | 09:11 AM

01transampower

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From: CO

Ok thank you for that info. No my ses light isnt on. But it just seems like the milage has gone to crap since hooking the gauge up.

Mar 22, 2011 | 09:31 AM

boostedbird38

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Quote:

Originally Posted by 01transampower

Ok thank you for that info. No my ses light isnt on. But it just seems like the milage has gone to crap since hooking the gauge up.

no prob

did you change anything else at all ?

Mar 22, 2011 | 09:51 AM

01transampower

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From: CO

Nothing at all. I know it could be hard to tell exact milage buton these cars but mine is my DD so I know what it gets and its not really there anymore. Should I just replace to o2 or should I check some other stuff first?