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| OzECruisers General Discussions E/N/D vehicles General Discussion ONLY. NO TECH THREADS |
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Thread Tools | Display Modes |
15-04-2005, 04:10 PM
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#1 | ||
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Regular Member
Join Date: Jan 2005
Posts: 118
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Why is when i "ground" my HEGO sensor (grey wire with blue stipe) That my car runs like s**t? It is a 91 EAII converted to multi point, I have just tested all the pins i can test on ECU, The voltages are fine, except the ISC is 11.5V, instead of 11V (i think that is fine isnt it?)
But when i take the grey,blue wire off earth, leaving it free hanging my car is runs beautiful, but the ECU voltages are wrong, the gound is about 3.5V, pin 49... what the car does, is it surges bad at constant throttle, and misses very badly on idle, leave the HEGO un grounded and it runs fine??? WTF?? Any ideas would be muchly appreciated Cheers Davo. |
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15-04-2005, 04:13 PM
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#2 | ||
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Banned
Join Date: Dec 2004
Posts: 4,377
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You could always leave it of. The last EA we had i left it out all together and never had any problems.
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15-04-2005, 04:32 PM
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#3 | ||
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Regular Member
Join Date: Jan 2005
Posts: 118
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I think it maybe runing a tad rich with it disconected.. But fuel economy is only slighlty worse..
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15-04-2005, 04:52 PM
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#4 | ||
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Banned
Join Date: Dec 2004
Posts: 4,377
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Cars was on gas so you wouldnt realy need it.
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16-04-2005, 09:42 AM
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#5 | ||
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Regular Member
Join Date: Jan 2005
Posts: 118
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My car does not run on gas..
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20-04-2005, 11:33 AM
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#6 | ||
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Regular Member
Join Date: Mar 2005
Posts: 102
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There has been lots of posts about the HEGO and it seems the MAP does most of the work but the HEGO adjusts for the best fuel ratio.
It would be helpful if you could measure the resistance and measure the volts when the engine is running and hot. Sounds like it has failed, but it could be a computer problem. There is a site which tells how to test it out of the car. The voltage is measured when the detector end is heated to red hot with a petroleum gas stove. Should be about .7 to 1 volt. Measured with a high impedance meter. Mine has done about 100000ks and has an indicator attached to show the output when running and works OK. Makes me think that so long as it works that is all it needs to do. |
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HEGO Sensor???
Linear Mode
