advice on supra??? - Toyota Nation Forum : Toyota Car and Truck Forums

blue86supra · 04-15-2006, 12:50 AM

hey i just got a 1986 toyota supra non-turbo. I was wondering what kind on intake i should put on my car for the best performance and also what kind of exhuast. and its having trouble passing smog its dumping too much fuel into the motor anyone have any ideas what the problem can be sensors possibly thanks

Kurtis

***bgrieger*** · 04-15-2006, 01:27 AM

Too much fuel? May be oxygen sensor, or you may have a leak in the intake system.

Intake, If you have to worry about smog, get the K&N as it has a carb certification.

Bob

blue86supra · 04-15-2006, 05:52 AM

thanks i will take a look at it

newCSbeliever · 04-15-2006, 09:16 AM

too much fuel could be anything. i would say vacuum leak for a starting point. smoke tester will tell you right away where your vacuum leak is if you so have one.

newCSbeliever · 04-15-2006, 09:17 AM

oh, you might check your injector o rings and test your injectors, one might be stuck open or partially open.

browncat1977 · 05-27-2006, 10:57 PM

You might also want to check the Mass Air Flow sensor. It sends the signal for the injectors to open according to how much air it is taking it.

RiZLA · 05-28-2006, 11:35 PM

try to find a local shop with a mandrel bender and get them to custom make you a cat back system. im doing that soon.

Jeeves · 05-30-2006, 11:17 AM

Quote:

Originally Posted by RiZLA

try to find a local shop with a mandrel bender and get them to custom make you a cat back system. im doing that soon.

Won't help him pass a smog test.

What are you failing on? Hydrocarbons (HCO), Nitrogen Oxides (NOx), Carbon Monoxide (CO), Carbon Dioxide (CO2)?

blue86supra · 06-01-2006, 01:05 PM

hey im failing in the hc's its only 100 over

Jeeves · 06-01-2006, 04:34 PM

Quote:

Originally Posted by blue86supra

hey im failing in the hc's its only 100 over

High HCO's are caused by partially unburnt fuel, in short, you're running too rich. Leanning it up some would reduce those HCO emissions. Is the O2 new/good? etc.

blue86supra · 06-04-2006, 05:06 PM

oh yea its brand new but i also adjusted the tps and the mass air flow sensor a bit so now i think its running alot better. Also do you think the idle control valve could do anything to affect that

blue86supra · 06-04-2006, 05:15 PM

also is there a way that you could get a chip for the car o improve it

Jeeves · 06-05-2006, 12:28 AM

Quote:

Originally Posted by blue86supra

oh yea its brand new but i also adjusted the tps and the mass air flow sensor a bit so now i think its running alot better. Also do you think the idle control valve could do anything to affect that

No, Idle Speed Control doesn't have anything to do with it.

Quote:

Originally Posted by blue86supra

also is there a way that you could get a chip for the car o improve it

Nope, no 'chip'.

blue86supra · 06-06-2006, 02:47 PM

Also yesterday i let my friend drive the car and when he drove it the exhuast would send out smoke is that because the exhuast is old because when it idles u can hear it rattle on the inside or is that another problem. I know it doesnt burn oil and it runs perfectly fine.

Jeeves · 06-06-2006, 02:53 PM

I already explained it for you,

Quote:

High HCO's are caused by partially unburnt fuel, in short, you're running too rich. Leanning it up some would reduce those HCO emissions.

Because Catalytic Converters break down HCO's and CO into CO2 & H2O, if it's dead it might not be breaking down the HCO's well.