Thanks Dennis. What would you define as "over advanced?" I try to run it at around 10* btdc.
On Tue, 22 May 2007 23:17:40 -0400, Dennis Haynes <d23haynes57@HOTMAIL.COM> wrote: >All those readings scream bad cat. The Co indicates the O2 sensor is >working but no clean up to 0 there. The High HC may be what killed the >Cat. Look for a lean miss fire and/or over advanced ignition timing. > >The NOx is defiantly bad cat. > >Dennis > >-----Original Message----- >From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of >Geza Polony >Sent: Tuesday, May 22, 2007 9:26 PM >To: vanagon@GERRY.VANAGON.COM >Subject: Bummer, man--Gross Polluter > >Doesn't sound good. > > >Just had the '84 1.9 smogchecked and results were WAY out of line: > >15 mph HC 148 CO .79 NO 2156 >25 mph HC 96 CO .66 NO 1828 > > >The tester was trying to tell me it looked like a failed cat (mine's 6 >months old but engine has been misfiring for that time, too...) > >New distributor, hall sender, wires, plugs, cap, rotor, hall control, coil >checks good. No vacuum leaks, AAR checks good, rebuilt AFM, all ECU pins >tests are good per Bentley. > >Compression is good at something like 140. Normal power, no oil burning, >rough idle. > >It helps the rough idle to disconnect the crankcase hose and plug the boot >hole up. > >Ideas? Looks like the state of California will shell out $500 to help fix >it, but what to fix? Could pinholes in the exhaust cause bad HC readings? |
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