N/A Gas milage.

[CRE]

It means you've never spent much time in California. If you'd had you'd know exactly what it means

No, JJ, I've been there way too much in the past... that place is a whole other kind of alien. Well, except the governor... he's just definitely Austrian.

Many older built to be sold abroad cars don't have lambda control or cats. After all without lambda cats are useless. Ask someone in the UK for example. Lots of cars over there without the stuff. Course, their weather sucks so bad emission controls aren't needed

How do they control their emissions?! j/k I thought that might be the case here, just couldn't remember if he was from elsewhere.

 

[ValgeKotkas]

So the cat needs a lambda sensor? Didn't think of that, cause I don't have one
Though we never haven't gotten the car under like 19mpg (in the 8 year of my dad's Supra driving experience). He got 27mpg highway.
I think the problem lies elsewhere?
And why should I be running lean when I'm not running rich? The AFM was ''tuned'' (screw screwed) with a computer hooked to the engine. Can't I be running ''normal'' ?
I guess it's the right time to change the Encino thing, cause noone but JAV and me seems to understand it (was a reference to the movie, like you mentioned CRE )

 

[CRE]

Lol, I only got the reference when I searched Estonia and Encino.... prior to that i was at a complete loss.

 

[ValgeKotkas]

You're not the first one

 

[Quin]

I also had to google it, lol

 

[jetjock]

Been to Estonia. Neat place. The women are to die for.

VK: Since the O2 sensor's sole purpose in life is to serve the catalyst an engine that came without a sensor won't come with a cat. Your ECU is programmed differently but even cars that came with sensors will run only slightly rich without them as long as everything else is working right. About .95-.98 lambda iirc. At least that's what every USDM 7M I've tested does.

Remember, an O2 sensor has the least authority of any sensor on the engine. It's an emissions device that isn't needed to make the engine run "properly" although it does provide better fuel economy. Point is the TCCS can get the mixture close without one, just not close enough for optimum catalyst efficeincy.

 

[AJ'S 88NA]

^^Interesting. So how would you tune without a 0-2 sensor JJ?

 

[jetjock]

Assuming you're diddling the air flow signal as most do it's actually easier because the engine is always open loop. No fighting the system like with a sensor. Tuning for open loop (acceleration or above the WOT prescription) is the same as with sensor equipped engines.

What it gets you is limited though. A good compromise is for the mixture to be close to stoich during steady state operation and the sensor does that very well. Any richer is a waste of fuel and generates more heat the cooling system must remove.

However the advantage of being open loop at less than 70% power is an ability to run leaner for increased fuel economy, along with cooler and cleaner operation. Since the typical car only uses around 25% power to haul itself down the highway doing so isn't a problem. The usual downside to lean operation is a substantial increase in NOx

You can do the same with sensor equipped engines too, just that it's a bit trickier to implement.

 

[CRE]

Gah! Open loop versus closed loop.... Never could keep then straight... thought I'd had it right for the past year or two though... which is it when the TCCS does not check the O2 sensor? Closed?

So, in a lean running engine how do we reduce NOx? Cool things down with some water?

 

[SupaMan]

i filled up at 151,608 im at 151,778 right now and im sitting right at a half a tank. Thats with multiple WOT runs including a trip to the strip last saturday (hour drive each way) and driving around town.

id say im on my way to a 300 mile tank

i expected ALOT less from my car with the exhaust leak this pleases me very much.

 

[AJ'S 88NA]

Everybody these days worried about gas milage. Did you guys know all this with the gas prices has been in the works since 1960's to raise prices $5-$10 per gallon? Google Gull Island in Alaska. The goverment and oil companies have been sitting on one of if not the largest oil supplies. These are wells that have been capped and not one drop has been seen by us.

If they were to uncap these wells it could at the least drop gas prices to $1.50/ gallon.

I'd suggest everybody and anybody you know email your congressmen for your state and ask why?

 

[3.0trd]

I get 22 in my na, lots of short trips, gunning it all the time, about 265 miles (I never let it go under a quarter) and I run 91 octane