Cylinder #8 lean
Legend
Joined: Jul 2011
Posts: 8,259
Likes: 4
From: Austin, TX
A word of advice - take it or don't - it's your choice.
One person told you cat, but you discount it. Three or four others have mentioned plenum AND possible cat on this thread, and you discount that.
To make it official, this is a common issue.
FWIW - take it or don't - it's your choice.
Champion
Joined: Aug 2009
Posts: 3,015
Likes: 8
From: Western NY,
CHECK THIS:
If you have a 1994-1997 you have EV1 injector connectors. The square ones with the very thin tiny metal clip around the plastic connector. If that thin clip is missing, then you will get a miss on that injector. It will not be a consistent miss either. It could be completely NOT firing or sporadic.
Check to see that all your connectors have clips. If you have a 1998-2001 then you have EV6 connectors with the red lick tabs and you should not have to worry. Howver, it could be the injector connectors. they get loose and they won't bite on the male prongs in the injectors.
If you have a 1994-1997 you have EV1 injector connectors. The square ones with the very thin tiny metal clip around the plastic connector. If that thin clip is missing, then you will get a miss on that injector. It will not be a consistent miss either. It could be completely NOT firing or sporadic.
Check to see that all your connectors have clips. If you have a 1998-2001 then you have EV6 connectors with the red lick tabs and you should not have to worry. Howver, it could be the injector connectors. they get loose and they won't bite on the male prongs in the injectors.
I also have a lean cylinder (#1) with mis codes and poping under load. I replaced the injectors and will be test driving today.... I suggest you buy the $25 leak down tester at harbor freight and do that test if you havent already to check the heads condition...
Last edited by Augiedoggy; Feb 16, 2012 at 08:47 AM.
Grand Champion
Joined: Apr 2010
Posts: 5,011
Likes: 6
From: Meeker, CO
It doesn't have to be lean to be hot. Pop a test pipe in place of the cat for a while and see what happens. Keep an eye on the codes to make sure the CEL is nothing more than cat failure during the test.
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
Likes: 17
From: NH
The cat is clogged and the precat o2 is bad. And depending on how long the cat has been clogged, you may have burnt or badly carboned valves and or a cracked head. Unscrew the the o2 and see if it runs any better. Might be too late anyway. Verify the cat and do a compression test.
Last edited by zman17; Feb 17, 2012 at 02:48 PM.
