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#11 |
![]() Join Date: Nov 2013
Location: San Jose, CA
Posts: 132
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It was about a 10 minute drive from work to the smog check station. Half local half freeway. I had the power key out. It's been around 2500 miles since my last oil change.
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1991 ZR-1 #405 (white/black with blue pin stripes) |
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#12 | |
![]() Join Date: Nov 2013
Location: San Jose, CA
Posts: 132
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1991 ZR-1 #405 (white/black with blue pin stripes) |
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#13 |
![]() Join Date: Aug 2009
Location: Livermore, Ca
Posts: 203
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Pay the registration before 3-8-15.
Dont want to get dinged on the late reg. Cal DMV wants there money.... My reg was up in Feb 2014 passed in Jul 2014
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1990 ZR-1 #642 Last edited by Coupe89; 02-04-2015 at 07:56 PM. |
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#14 |
![]() Join Date: Aug 2009
Location: Livermore, Ca
Posts: 203
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No limit.... I think mine failed 4 or 5 times before it passed.
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1990 ZR-1 #642 Last edited by Coupe89; 02-04-2015 at 07:55 PM. |
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#15 |
![]() Join Date: Aug 2009
Location: Livermore, Ca
Posts: 203
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The O2 sensors.
the drive side is easy. This is what I used to get the passenger side one off. ![]()
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1990 ZR-1 #642 |
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#16 |
Join Date: Jun 2013
Location: Toronto
Posts: 782
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The hotter the combustion temps are the better it will be on emissions. flip that power key and nail it a few times to heat it up and clean it out. Drive it around for 15-20 minutes with a few wot and take it hot to the test. I know you probably don't want to chance it on that but if they'll retest for free im fairly certain it would be enough to pass was for me. Oh and also the catalytic converters work better when hotter too so that may be all it needs.
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#17 | |
![]() Join Date: Nov 2013
Location: San Jose, CA
Posts: 132
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Ummm...here comes a dumb question...where are the sensors located? Would I be able to find a diagram in the FSM?
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1991 ZR-1 #405 (white/black with blue pin stripes) |
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#18 |
![]() Join Date: Aug 2009
Location: Livermore, Ca
Posts: 203
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Before the cats on my 90
Drivers side. ![]() Passenger Side (From the bottom) best pic I have.... ![]()
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1990 ZR-1 #642 |
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#19 |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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I have the $45 Bosch ones from the parts store. They have been thru two smog test cycles now and pass. The originals were German made (also Bosch), but these are of US manufacture. One of the ones i got from Jerry a couple of years back had awfully short leads...I don't know if he is selling a different one now.
the o2's might clean up the low speed hydrocarbons a little too. They don't last forever. For NOx they have to be dead accurate as the sensitivity to lean or rich conditions elevate that gas quite rapidly. I'm sure you'll do better after you swap them for new. |
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#20 | |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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Basically pinging is the ultimate NOx production condition. egr normally blows a puff of dirty air right when you crack the throttle to keep combustion temp below the threshold for nox. but of course the early cars have 11:1 compression and no egr. |
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