Old O2 sensor would be my first guess.

 

How much is a new O2 sensor?

 

$50 USD for a Bosch part from my local Pep Boys. You have an N/A so it's cheap.

 

$35 from kragen's etc (you have to cut the wire off your stock O2, strip it, and clamp the new O2 sensor's wire to it)

 

It costs about $42-44 to fill up from empty with 89 octane

I Pay ~$18 USD to fill up with 93 octane. I'll never complain again

 

$35 from kragen's etc (you have to cut the wire off your stock O2, strip it, and clamp the new O2 sensor's wire to it)

Thats not to bad then

Whats the next thing to check? Fuel filter?

 

I Pay ~$18 USD to fill up with 93 octane. I'll never complain again

geeze, thats almost $1/gallon. I usually end up around $26 and thats for crappy oxygenated California 91 octane...


Speaking of (rant mode), gray davis and his band of well-intentioned enviromental fuck-ups need to pull their heads out of their collective asses. Adding oxygen to gasoline in a Fuel injected car does extremely little for emissions, but decreases your gas mileage because you're actually burning less fuel (your O2 sensor sees that you're running lean and decides to richen the mixture to bring it back to the same readings from normal gas)... Throw in MTBE, and CO2 emissions, and you're bound to come to the conclusion that the majority of emissions in CA are from THC being absorbed in Sacramento

 

I Pay ~$18 USD to fill up with 93 octane. I'll never complain again

You lucky bastard

thats like 27 CAN... i pay nearly 30USD..

 

$50 USD for a Bosch part from my local Pep Boys. You have an N/A so it's cheap.

What's more expensive for the turbo?

 

What's more expensive for the turbo?

turbo is three-wire, NA is 1-wire. If you buy the "universal" types you have to cut and splice. It generally costs 1/3 of the plug-and-play versions. Unfortunately, I dont believe you can buy a "universal" 3-wire O2 sensor with the stupid flange toyota put on. But, you can buy the NA universal flanged one-wire, and a universal 3-wire made for any old car. You unscrew the 1-wire from the flange, and screw the three wire into the flange. Cut and splice, and you've spent $60, compared to toyota's $112

 

Heh, I run nothing but Chevron 94 in my baby. Small price to pay (just less than a dollar a liter) to keep her from knocking her pistons to death, driving up some huge hill.


Anyway Stonedwom, you are getting horrible gas mileage, unless you're driving really hard, carrying tons of heavy stuff, or commute in a very hilly area (which you may be).


Time to use the TSRM, and start troubleshooting. Here is the fuel economy troubleshooting chart.

http://www.cygnusx1.net/supra/library/TSRM/em/EM_06.html


Almost anything can be tested, and verified if it's working properly, and only faulty components replaced. No sense replacing parts just for the heck of it.

Now if only mechanics would work like that!

Start with the basics like compression check, ignition timing, spark plugs, spark plug wires, cam belt alignment, air/vacuum leaks, oxygen sensor, etc. etc.



And don't forget about alignment, underinflated tires and dragging brakes either.

Best part is, that once you get it tuned up or repaired, you should gain some horsepower as well.

Best Luck.........Sdude.

 

You guys are all pretty lucky here in Sac, CA. Cheveron Supream 91 octane (that's all thats available) is $1.74 and 9/10ths of a cent per gallon right now. It usually cost me $32-36 everytime I need to fill up.

 

man i pay like 20-25 dollars to fill up, and thats like every week and a half or so, but whatever, i love ma car so ill just keep shelling out cash to fill her up

 

yeah i get like 320 miles to a gallon in my 86' i pay like 30 to fill it up. $1.74 a gallon gets very expensive

 

The BOSCH oxygen (lambda) sensor plugs right into the stock wire connector. You can also get a plug-compatible from CarQuest, if they have shops in Canada.

I get 23-27 miles per US gallon (3.75 litres) and 93 octane is $1.54/gal in Northern Virginia. Why's gasoline so expensive? I thought Alberta was awash in oil.

 

You Bastard!!!!!!!!!!
I dont get that good of gas millege, and my gass is more expensive!!!!!!!
If I want 93 octane its like $1.80/gal

oh I get like 22-24 turbo

 

My old 86.5 NA got 21mpg in town and 27-28mpg on the highway. When I swapped in the 88 turbo (3.909:1) differential, it jumped to 31-32mpg on the highway. If an NA is running right it gets quite good gas mileage (much better than the retarded EPA figures ). BTW, that's not a resonator in the intake. It's a Desholds chamber. Put it back in. It hurts midrange power to remove it.

 

Shoot, I get 18mpg total. I usually get about 280miles to the tank until the gas light comes on.

I haven't changed my o2 sensor yet since I did the diagnostic and didn't return a code. Perhaps its on its way to being fubared? Hmmmm

 

If your timing is retarded you will run rich and will get worse gas milage. I would recommend advancing your timing a few degrees past stock to lean it out a little. You will get a lot more power from advancing your timing too, but be careful cause you dont want to have your motor pinging. If you do this make sure you run ONLY premium gas.

 

Just because theres lots of oil/gas in alberta dosent mean the government gives a shit...its not like you can make your own gas(for your car)..
BTW i got horrible gas milage outa my supra full tank= 60 liters costs around $45 lasts 270 KM..ouch

cant wait to see what it runs with 720cc injectors and dual fuel pumps..

my O2 sensor was on the high side of the resistance speck and the driver has a heavy foot

 

14 mpg, thank you very much Lexus/550 Only costs me about $22 to fill up. I was getting 17-19 mpg when my S-AFR was working.

 

Ahhhh the good old days of great gas milage. Well i get about 280KM on a tank full of 94 Octane.

Rupinder
89T - few mods

 

I get about 500-600km per tank, driving in stop-and-go rush hour traffic every day.

About 30km one way, and half of that is inching forward, at a breakneck 10km/h.

Ah......the joys of owning a 5 speed in downtown traffic.

Cheers........Sdude.

 

I get about 500-600km per tank, driving in stop-and-go rush hour traffic every day.

About 30km one way, and half of that is inching forward, at a breakneck 10km/h.

Ah......the joys of owning a 5 speed in downtown traffic.

Cheers........Sdude.

What year is yours? Turbo? Thats crazy...
i have a 5 spd as well and as i said up above, mines terrible.

 

You guys are all pretty lucky here in Sac, CA. Cheveron Supream 91 octane (that's all thats available) is $1.74 and 9/10ths of a cent per gallon right now. It usually cost me $32-36 everytime I need to fill up.

wtf... its costs me about 1.89 for chevron 91 octane in san jose and usually costes me $25 to fill up, oh well, i get about 14- 18mpg in my car