New Tune on car, problems - Page 3 - ZR-1 Net Registry Forums

-=Jeff=- · 02-25-2009

Quote:

Originally Posted by kenthompson

I agree, it got installed just as a check. Are you saying that is normal behavior?

I'm going to have to find my laptop that I used for recording on the diag connector so I can post voltages.

yes typical OEM O2 will swing lean to rich..

a Wideband would confirm for sure..

XfireZ51 · 02-25-2009

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.

kenthompson · 02-26-2009

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.

-=Jeff=- · 02-26-2009

you will get it.. what is 64 again?

kenthompson · 02-27-2009

Quote:

Originally Posted by -=Jeff=-

you will get it.. what is 64 again?

Left side lean, I believe. Or right side lean.

XfireZ51 · 02-27-2009

Rt side. May want to check injectors.

02-25-2009	#22
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	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.

02-26-2009	#23
kenthompson Join Date: Jul 2007 Location: Las Vegas Posts: 298	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. __________________ 1990 Grey/Black Too many for the sig.

02-26-2009	#24
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	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

02-27-2009	#26
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: New Tune on car, problems Rt side. May want to check injectors.