Can I Run In A Gtr With No O2 Sensors?

[Brezza]

Hey Guys,

I've just had my motor rebuild because i spun a bearing.

the engine had all these parts new: pistons, bearings, crank, water pump, sump baffle.

head also has been recond, thicker head gasket, oil restrictor to the head.

my O2 sensor had been damaged when my rear turbo blew 1 month before the motor went (been replaced with 2860-5's), and the new sensors havent come in yet, but the mechanic said that they'll be there when the car needs a first service after 1000kms.

so i've been driving around with the sensors not plugged in, he told me that its okay because the ecu goes into safety mode? plus i am not boosting the car, keeping it under 4000rpm and trying to keep on 0 boost which is hard.

the car is really responsive down low, and runs better than it ever has, just wondering whether anyone else on here has done the same thing? and if they have seen any issues?

cheers guys!

[TiTAN]

km to a tank? its probably running stupidly rich.

[Brezza]

i've only done 200kms in the car so far, its not going through the fuel like you would think. its not drinking the fuel any more than it used to.

BTW its still a stock ECU

[IOWNU]

Yes you can.

[mad082]

yes you can. i drove round with it unplugged in my pulsar for ages. even stuck a wideband up the tailpipe to check AFR's. instead of running around 15:1 you will be running 11 or 12:1. so your fuel economy shouldn't be excessively more because when you floor it even with the o2 sensor plugged it ignores the o2 sensors.

[femno]

Exactly, the 02 sensors only work when cruising...youll get shit fuel economy but it wont hurt anything. Although it could be undesirable for bedding in rings etc.

[Beer Baron]

can you? yes. should you? no. well not with a stock ecu and a new engine.

at idle and on cruise the car will be running excessively rich. so make sure you do not leave the car idling or at steady state (small-moderate throttle openings, low load, low rpm) cruising for any prolonged period of time. you should be doing that anyway but with it being all the more rich the last think you want is all that fuel washing down the bores.

[Brezza]

yeah i was told not to let it idle for too long, also to not sit at the same low rev's for too long, just keep slowly accelerating and backing off.

also one thing i have noticed, that its boosting at lower rev's than it used to. so really to keep it completely off boost i have to shift @ 3,000 rpm but if i got to 4,000 rpm it will have a little bit of boost, maybe from guessing on the guage 3-4psi.

does Boost really do much damage when running in an engine? i'm not wanting to thrash the car, but when you're putting a little bit of load on the car the boost does creep up.

cheers for any help