No 02's how will it run
10-18-2006, 01:10 PM
#1
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No 02's how will it run How will my 97 z28 run with no 02's?My car wont stay runing and pops a lil and when it dies smoke comes out of the intake is this bc there is no 02's?
10-18-2006, 03:11 PM
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The not wantin to run prob was the badgas from sitting I put some stuff in the tank that helped alot the more I run it the better it gets I think its had half hour run time in all with no 02's
10-18-2006, 05:58 PM
#7
Yeah, I don't think it will go into closed loop. I had a buddy at work putting a lt1 in 56 chevy truck using a 93 ecm, and for some reason only using one bank's o2 sensor. He left one bank unplugged and pcm never went into closed loop. He ended up splicing the signal wires together and using one o2, and once again I don't know why he didn't just use both banks. Once he spliced them together then the ecm would go closed loop. If you do stay open loop it will run rich unless you have a way to tune the ecm. Then you can just tune the car to run open loop all the time, though I don't know if that would be best. My car runs great when tuned to run open loop all the time. Just some info.
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It will never go into closed loop if you do not have O2s.
10-18-2006, 08:24 PM
#11
Originally Posted by 97blkz
It will not idle and run like ***!
If it does that I'd say you have another problem. I ran with no O2s for several months and had no issues. My old O2s went bad and I didn't get around to replacing them for a while so I just unplugged them.
It might run slightly rich since the pcm cannot make adjustments to the fuel for different pressure/temperatures and such, but it shouldn't cause any major problems that would prevent the engine from running.
10-18-2006, 10:32 PM
#12
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Well I do have one 02 hooked up I had to cut it and make the wires longer for my long tubes so not sure how good its runing.It did have gas sitting for over a year in it so not sure if thats why it pops a lil at idle or if I have to change a nother plug wire.After 5 good mins of idling the car will jus die and is a bitch 2 restart!!!
10-19-2006, 02:31 PM
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Change the fuel and check the fuel pressure. If you are only running one 02 then it sounds like you are running in open loop already. My car has a stumble off idle, so I unplugged 1 02 to richen the mixture, the car stays in open loop. the stumble is gone and it has never idled more smooth!
