Author | Topic |
Location: NSW
Registered: September 2003
|
What happens with no Oxy sensor
|
Fri, 02 July 2004 01:25
|
|
Can I drive my car without the oxy sensor hooked up?
What will happen?
|
|
|
Location: NSW
Registered: September 2003
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 01:31
|
|
More info:
Custom extractors off a 4ag with carbs... I want to use them on my car but they have no oxy sensor inlet.
Can I fit them and drive the car (without the oxy sensor) to a guy who is gonna place an fitting into my engine pipe.
Will the car go or will it cause any damage...
Oh they are going on a early GZE.
Thanks
|
|
|
Location: Melb, Victoria
Registered: April 2004
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 01:38
|
|
u can drive it without O2 sensor but it stuffs up ur mixtures and u get real bad fuel economy.
|
|
|
Registered: June 2004
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 01:40
|
|
the oxy sensor tells the ecu what air/fuel mixture the engine needs, if it isn't there, it won't work properly or not at all. either way, refit an oxy sensor, it needs to be in a location where it gets exhaust from all cylinders.
|
|
|
Location: Lost in the K hole
Registered: May 2002
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 01:40
|
|
the people in the car behind you will have tears in their eyes at the lights...
|
|
|
Location: NSW
Registered: September 2003
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 01:43
|
|
ed_ma61 wrote on Fri, 02 July 2004 11:40 | the people in the car behind you will have tears in their eyes at the lights...
|
Is that from laughter or breathing my tasty emmisions or both???
|
|
|
Location: Lost in the K hole
Registered: May 2002
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 01:45
|
|
rich as shit exhaust
|
|
|
Location: NSW
Registered: September 2003
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 01:47
|
|
Thanks... I just gotta drive it about 12k's to my mates workshop. Was just worried about breaking down or wrecking something along the way.
|
|
|
Location: Brisbane
Registered: May 2002
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 04:05
|
|
It won't cause any problems apart from worse than average fuel economy. And I doubt it will run "rich as shit", ie black smoke from the exhaust, since the ECU only trims the mixtures by a few % in closed-loop mode.
|
|
|
Location: sunny coast, qld
Registered: October 2002
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 04:34
|
|
i drove my car with no 02 sensor for a little while because the mechanic was too lazy to refit it
it wasn't THAT rich, bit of smoke but not that much and not all the time either.
anyway, should be alright
|
|
|
Location: Melbourne
Registered: October 2003
|
Re: What happens with no Oxy sensor
|
Fri, 02 July 2004 16:50
|
|
dam... if oxy sensors were so good as knowing a/f ratio's that the car wouldn't run w/o it then why bother with airflow sensors?!?
If it's a 3 or 4 wire type you can put it lower down, if it's a single wire type you need it as close to the engine as possible.
Why not put it on the extractors and not on your pipe?
|
|
|
Location: Brisbane
Registered: February 2003
|
Re: What happens with no Oxy sensor
|
Sat, 03 July 2004 00:08
|
|
hemi twofifteen turbo wrote on Sat, 03 July 2004 02:50 | dam... if oxy sensors were so good as knowing a/f ratio's that the car wouldn't run w/o it then why bother with airflow sensors?!?
|
'cause (without a map sensor) there's no way the ECU will know what the engine is doing (apart from rpm from the dizzi and throttle position). Different air flows require differing ingition and injection timings.
tho... with ion sensing ignition (it checks result of each ignition/burn event via the spark plug) the ECU could do an even better job of tuning the fuel use and ignition timing during cruise.
|
|
|
Location: Brisbane
Registered: June 2003
|
Re: What happens with no Oxy sensor
|
Sat, 03 July 2004 07:46
|
|
lol ask me about faulty o2 sensors! I have two of em
Getting 400km highway driving / tank of fuel isnt very good for a 7mge!
I need to do a diagnosis on mine to make sure thats definetly the problem
|
|
|
Location: Brisbane
Registered: May 2002
|
Re: What happens with no Oxy sensor
|
Sat, 03 July 2004 13:20
|
|
Narrow-band O2 sensors are only used under low-load, cruise conditions because (a) they're only good for keeping the mixtures at stoich (not what you want at WOT) and (b) they don't respond quickly enough to transient conditions.
|
|
|
Location: Brisbane
Registered: February 2003
|
Re: What happens with no Oxy sensor
|
Sat, 03 July 2004 14:11
|
|
V8_MA61 wrote on Sat, 03 July 2004 17:46 | I need to do a diagnosis on mine to make sure thats definetly the problem
|
blake, to get codes from ECU:
-open <www.cygnusx1.net/supra/library/TSRM/fi/FI_001. html>
-click on "Diagnosis System"
-print pages Fi-23 to FI-29
-go out to car with pages and follow instructions
you car only has one O2 sensor? did you get a spare that was a dud? ;-(
how many wires on back ofth O2 sensor?
|
|
|
Location: Bayside Melbourne.
Registered: May 2003
|
Re: What happens with no Oxy sensor
|
Sat, 03 July 2004 16:52
|
|
thechuckster wrote on Sun, 04 July 2004 00:11 |
V8_MA61 wrote on Sat, 03 July 2004 17:46 | I need to do a diagnosis on mine to make sure thats definetly the problem
|
blake, to get codes from ECU:
-open <www.cygnusx1.net/supra/library/TSRM/fi/FI_001. html>
-click on "Diagnosis System"
-print pages Fi-23 to FI-29
-go out to car with pages and follow instructions
you car only has one O2 sensor? did you get a spare that was a dud? ;-(
how many wires on back ofth O2 sensor?
|
I replaced mine on my 7MGE and it was a dud. I then fitted an aftermarket one and adapted the plug to fit. There is only one wire on these O2 sensors.
|
|
|
Location: wollongong NSW
Registered: August 2003
|
Re: What happens with no Oxy sensor
|
Mon, 05 July 2004 10:57
|
|
nothin bad just like everyone says just runs rich but i wouldnt suggest driving for long distances cos i was following a mate that just did a gze conversion that didnt have to O2 sensor in yet and the cat was glowing bright red
actually that was the time when it was running without the O2 and only on 2 cylinders because the coil had exploded or something
|
|
|
Location: Brisbane
Registered: May 2002
|
Re: What happens with no Oxy sensor
|
Mon, 05 July 2004 23:09
|
|
Um, I think you'll find it was the running on 2 cylinders part that caused the glowing cat, not the missing O2 sensor. With no O2 sensor the ECU will just run in open-loop mode, which is what it does when you crack the throttle open anyway. In other words it will run richer but not stupidly rich.
|
|
|
Location: newcastle
Registered: June 2002
|
|
|
Location: Brisbane
Registered: June 2003
|
Re: What happens with no Oxy sensor
|
Tue, 06 July 2004 12:46
|
|
SIMDOG wrote on Sun, 04 July 2004 02:52 |
thechuckster wrote on Sun, 04 July 2004 00:11 |
V8_MA61 wrote on Sat, 03 July 2004 17:46 | I need to do a diagnosis on mine to make sure thats definetly the problem
|
blake, to get codes from ECU:
-open <www.cygnusx1.net/supra/library/TSRM/fi/FI_001. html>
-click on "Diagnosis System"
-print pages Fi-23 to FI-29
-go out to car with pages and follow instructions
you car only has one O2 sensor? did you get a spare that was a dud? ;-(
how many wires on back ofth O2 sensor?
|
I replaced mine on my 7MGE and it was a dud. I then fitted an aftermarket one and adapted the plug to fit. There is only one wire on these O2 sensors.
|
How much did your afdtermarket o2 sensor cost?
|
|
|
I Supported Toymods
Location: melbourne.vic.au
Registered: May 2002
|
Re: What happens with no Oxy sensor
|
Tue, 06 July 2004 13:05
|
|
Drive a 5M-E. And watch fuel economy
|
|
|
Location: Brisbane
Registered: February 2003
|
Re: What happens with no Oxy sensor
|
Tue, 06 July 2004 13:11
|
|
ZZT231 wrote on Tue, 06 July 2004 23:05 | Drive a 5M-E. And watch fuel economy :
|
isn't that an oxymoron like "army inteligence" and "fresh frozen"?
|
|
|
Location: Lost in the K hole
Registered: May 2002
|
Re: What happens with no Oxy sensor
|
Tue, 06 July 2004 13:29
|
|
Norbie wrote on Fri, 02 July 2004 14:05 | I doubt it will run "rich as shit"
|
ask rob about the last time he drove behind me from a toymods meeting
|
|
|