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Location:
Northwestern Sydney
Registered:
August 2002
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18R-GEU - O2 sensor
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Fri, 10 October 2003 00:09
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I'm looking at installing stoich gauge to assist with tuning the car, I'm not 100% on how these work but I'm guessing the run off an O2 sensor. Is this correct??
If so has anyone put one onto an 18r-geu?
what sensor was used?
Cheers
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Location:
Brisbane
Registered:
May 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 00:14
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A proper A/F ratio gauge uses a wide-band lambda sensor, and these cost $$$. Your standard narrow-band O2 sensor is much cheaper but pretty hopeless for tuning purposes.
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 00:24
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At the moment I don't have an O2 sensor in the system and I'm having problems with mixtures leaning out at high revs
I am planning a megasquirt fuel computer upgrade in the near future but I would like the car tuned properly in the meantime
My problem is I don't yet know much about tuning EFI.
Is there anyone out there with experience with 18R-GEU's and how to tune them. I'm now at a total loss as anything I do just makes things worst.
I have no problem with taking it to someone but I an keen to learn more about tuning and the few people I've taken it to tune it charge me then send me on my way and the car was running better before I took it there.
I'd like to have a dig at the > 2000 N/A quater mile time on the 22nd if I can get things sorted.
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Location:
Brisbane
Registered:
May 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 01:04
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Take your car to a workshop with a chassis dyno and an exhaust gas analyser. You'll be able to see in real-time what your mixtures are doing under all load and rpm conditions. Once you've sorted out what the problem is, you can talk to them about the best way to fix it.
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 01:13
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I've done that which is why I'm looking at a better fuel computer setup. the stock ECU can't keep up with the engine.
I was told to look into an aftermarket computer. (which they then tried to sell me)
I just have very little faith in alot of mechanics at the moment
which is why I'm trying to learn about tuning so I can at least grasp what mechanics are telling me.
I really don't know who to trust and I don't want to spen another 300 bucks to find out the same thing, until I've got the computer wired in and I get It dyno tuned.
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Location:
Seattle area, USA
Registered:
June 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 05:56
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what mods do you have?
What ECU, injectors(what color?), AFM, etc... do you have.
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 07:07
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Starndard ecu, injectors, AFM etc. but the engine has been bored out has 22re rods, Hilux?? pistons cam work on the exhaust side
unless I've wired the loom wrong (possible) I just can't get the car running to my satisfaction.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 08:33
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megasquirt looks like a piece of piss to setup. Ill be skipping the whole factory EFi gizmo and going straight down that path...
Tuning - just sit on a dyno and press some arrow keys - how easy is that!!?!?
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Fri, 10 October 2003 08:43
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Yeh...I've been speaking to oldcorollas about it recently.
I'm going there as well. should be a good learning exp.
hopefully with excellent results 
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Location:
SYDNEY
Registered:
August 2003
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Location:
Brisbane
Registered:
February 2003
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Re: 18R-GEU - O2 sensor
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Sat, 11 October 2003 08:27
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there's a guide for tuning megasquirt here:
<http://members.shaw.ca/megasquirt/manual/mtune.htm>
it (and other efi stuff i've stumbled across) suggest:
- get engine idling and starting properly
- tune for minimal load (no serious accel or WOT) driving
- then tweak for power
i guess the same methodology applied for after market ECUs? no point trying for max power if engine won't idle or crank without aerostart.
also, SDE had this about using o2 meters to tune in their FAQ section: <http://www.sdsefi.com/techegt.htm>
also2, techedge <http://www.techedge.com.au/> have several wideband testers.
anyway, how much can you modify the RGUE ECU?
charles.
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Location:
Seattle area, USA
Registered:
June 2002
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Re: 18R-GEU - O2 sensor
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Sun, 12 October 2003 04:57
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| Lambolica wrote on Fri, 10 October 2003 17:07 |
Starndard ecu, injectors, AFM etc. but the engine has been bored out has 22re rods, Hilux?? pistons cam work on the exhaust side
unless I've wired the loom wrong (possible) I just can't get the car running to my satisfaction.
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Interesting setup. The 22RE rods are longer, the hilux pistons must have a higher wrist pin height to allow the longer rods. And they must've been fly cut. Did you build it yourself?
What is the EFI doing that you don't like?
Everything is Standard 18RGEU parts?
Have you checked them to see if they are within specs?
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Mon, 13 October 2003 07:01
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No, It was built buy the previous owners uncle (who builds V8 supercars) I'm limited on EXACTLY was done to it but I'm led to beleive that it has been built out to 2.4l and has high compression (around 10.5 : 1) but I need to spend some time and look at the stroke height etc. to see if this is the case.
I may also have a problem with the cooling system and the wire from the water temp sender that is there is no thermostat in the car and is always running cold (ECU Allowing extra fuel)
I need to put the thermostat back in and re-tune at the correct operating temp. this may solve some of my issues.
It doesn't like starting in the morning,
and is very slow off the line (like the 18r-c was quicker)
but once she hits abou 4500rpm she goes well.
I'm going to play with it tonight I'll see what I come up with.
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Location:
Seattle area, USA
Registered:
June 2002
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Tue, 14 October 2003 02:12
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I'll get back to this,
My engine went bang last night 
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Location:
Seattle area, USA
Registered:
June 2002
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Re: 18R-GEU - O2 sensor
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Tue, 14 October 2003 05:15
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| Lambolica wrote on Tue, 14 October 2003 12:12 |
I'll get back to this,
My engine went bang last night
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WTH?!?! what happened exactly as you remember it.
btw where are you located?
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Tue, 14 October 2003 06:05
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refer other post "the third f@#king problem" I doubt that the knocking I'm getting is anything to do with the wiring.
I'm in Kellyville N.S.W
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Location:
Seattle area, USA
Registered:
June 2002
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Re: 18R-GEU - O2 sensor
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Tue, 14 October 2003 06:08
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damn. best to stop running it and open her up. you could get lucky and just need a slight polishing of the crank and new bearing shells.  have any oil pressure probs?
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: 18R-GEU - O2 sensor
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Tue, 14 October 2003 06:16
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No, No oil pressure problems.
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