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Oxy Sensor?? 

 

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Posted: Thu Jun 14, 2007 3:37 pm 
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Ok i removed the Oxy sensor and found alot of black carbon indicating a rich mixture. Im seriously leaning toward the IAT sensor that i will replace tomorrow. See pics below.

 

 

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Posted: Thu Jun 14, 2007 3:49 pm 
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when I changed the oxy sensor it improved my consumption by about 20%+ with both gas and petrol.
I do have cold running issues with lpg but I understand that's pretty normal.
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Posted: Thu Jun 14, 2007 4:24 pm 
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Mine is pretty good on petrol consumption on Hwy trips but may be drinking the petrol cold start ups. Will let you know how it goes after replacing the IAT sensor which may be your problem Richard with cold starts.
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Posted: Thu Jun 14, 2007 5:17 pm 
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i replaced my batery and that helped, used to stutter for 30 secs first thing down the road

 

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Posted: Thu Jun 14, 2007 5:20 pm 
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I have a spare one too. off an old taxi so it may be stuffed LOL
I was thinking of swapping it to see what happens. bloody frozen today though....brrrr
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Posted: Thu Jun 14, 2007 8:46 pm 
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i had same problem with my ef and it ended up being a coil after 4 months then it died and i put a coil on it and never had problem since

 

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Posted: Fri Jun 15, 2007 9:52 am 
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fiftyone wrote:
i replaced my batery and that helped, used to stutter for 30 secs first thing down the road


Battery is only 4 months old and is a 550CCA so id doubt its that but thanks for the tip anyways.
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Posted: Sat Jun 16, 2007 12:05 am 
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Ok i installed the IAT sensor this afternoon, it did change the smell of the exhaust fumes (not as rich) the idle improved slightly but may have to wait for the ECU to re-learn the new mixtures. One thing that i found weird was the old IAT sensor was moist with fuel and the intake appeared moist. I have no idea on how thats happened unless it was that rich there was unburnt fuel in the cylinders that somehow blew back into the intake. I will check the timing again tomorrow and set the base idle again then erase the ECU for any faults. basically start from scratch in the KAM.
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 Post subject: oxy sensor
Posted: Sat Jun 16, 2007 11:02 am 
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i cruzed into repco over here and asked for an oxy sensor..the guy had to get it brought over from another repco..i said "ok thats cool"...then asked"uh how much is it?"....he said..$350!!!!!!! i said "ur kidding"..he say " im sure we can do a lil better than that"..i said"yea but not a qaurter of the price aye mate" and left.....**??????** thats just crazy. surely thats wrong :?

 

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Posted: Sat Jun 16, 2007 5:48 pm 
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An oxy sensor (or HEGO sensor) from Repco is around $67 and the IAT is $37. Now that was with a discount but $350 for the oxy sensor is way too much. Anyways ive replaced both and the hesitation when cold is gone. So the Oxy sensor improved fuel economy and the IAT got the fuel mix right from cold start up. I still have a slight miss on idle but mainly in park or neutral, is fine in drive.

I read in my manual that a faulty Canister purge control soleniod can cause poor idle, stalling and poor drivability. It can be found next to the carbon canister insite the left wheel arch.
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Posted: Sat Jun 16, 2007 6:34 pm 
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ahh good to hear. i might have to grab an IAT sensor and try it over the holidays

 

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Posted: Sun Jun 17, 2007 5:35 am 
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Hey all ive been thinking that my ignition timing problem may have contributed to the IAT sensor failing. It was moist with fuel when removed, now my timing thanks to a Haynes Automotive repair manual that forgot to mention that from ED onwards that the Ignition timing procedure was different (waiting approx 2min after the idle raises then drops straight after starting engine self test mode) my timing was approx 7-8 deg retarded which may have caused over time for unburnt fuel to blow back into the intake manifold covering the IAT sensor causing it to read wrong, this may have been worse on a cold start as more fuel was injected but not fully burnt. So from EXPERIENCE dont trust every manual you read!!!!
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Posted: Sun Jun 17, 2007 12:17 pm 
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i would also check you coolent temperature sensor.
its f**k piss easy to change, just get one from wreckers.
its the little thing that goes into the thermostat.
one clip on one bolt.
just gotta watch the coolant level...
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Posted: Sun Jun 17, 2007 12:56 pm 
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elvondel wrote:
just gotta watch the coolant level...
Use a syphon pump (those ones for $5 from Supercrap, etc) and drain the overflow tank - the pump should fit down the hose to the radiator, drain it down by a few inches.
When the water level is below the thermostat housing, you won't lose a drop.

 

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Posted: Sun Jun 17, 2007 1:25 pm 
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my ea was doing the same thing i change the o2 sensor and that helped but what got rid of it completly was cleaning out the iac, the iac driver had seized
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