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02-25-2009
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#21 | |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: New Tune on car, problems
Quote:
yes typical OEM O2 will swing lean to rich.. a Wideband would confirm for sure..
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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02-25-2009
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#22 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
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Re: New Tune on car, problems
O2 voltages are supposed to "swing" through a x-over point. So it is normal to see lean rich lean. The cat would be damaged otherwise. NB voltages are meaningless at WOT.
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02-26-2009
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#23 |
 
Join Date: Jul 2007
Location: Las Vegas
Posts: 298
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Re: New Tune on car, problems
Changed the plugs tonight, (if I could figure out how to post pictures I would). Left bank appeared to be normal, gray-brown across ground strap and down center electrode. Right bank showed brown/gray across the underside of the ground strap (spark side) and the center electrode. The rest of it was black but dry. Number 5 had broken the porcelin (sp) on the center electrode and had basically shorted out.
Also changed out the O2 sensors (cheap insurance I thought). Car runs a lot smoother now but issued a code 64 idling in my driveway. At least we're getting down to less and less error codes! Guess I'll pull the fuel pumps tomorrow night.
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1990 Grey/Black Too many for the sig. |
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02-26-2009
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#24 |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: New Tune on car, problems
you will get it.. what is 64 again?
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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02-27-2009
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#25 | |
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Join Date: Jul 2007
Location: Las Vegas
Posts: 298
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Re: New Tune on car, problems
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1990 Grey/Black Too many for the sig. |
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02-27-2009
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#26 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
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Re: New Tune on car, problems
Rt side. May want to check injectors.
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