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19doug90 · 05-17-2008, 09:46 AM

ah right on, i knew the downstreams monitored the cats but figured if it was reading the cat being seriously rich it would lean out the engine a bit. Guess not tho.

So could i just delete the downstream 02's completly and live with the check engine light? when i was going accross the country i lost an 02 and the truck went into a borderline limp home mode, gobs of fuel lost 1/3 of my gas mileage until i got it fixed. But the reader said both the upstream and 1 of the downstreams were bad.

Was this just caused by my upstream going out or if i completly disconnect the downstreams might this happen?

05-17-2008, 09:46 AM	#3
19doug90 Registered User Status: Offline Join Date: Jan 2006 Member ID: 41094 Pics: My Gallery Location: Edmonton AB Posts: 531	Re: no cats how lean ah right on, i knew the downstreams monitored the cats but figured if it was reading the cat being seriously rich it would lean out the engine a bit. Guess not tho. So could i just delete the downstream 02's completly and live with the check engine light? when i was going accross the country i lost an 02 and the truck went into a borderline limp home mode, gobs of fuel lost 1/3 of my gas mileage until i got it fixed. But the reader said both the upstream and 1 of the downstreams were bad. Was this just caused by my upstream going out or if i completly disconnect the downstreams might this happen?