Burning rich need supra help

brad mccarty · 02-10-2006, 05:24 AM

My 88 supra turbo is using alot of gas like more than it is sopposed to and is burnning rich im thinking o2 sensor, has anyone ever had this problem any help would be great..

New to the supra scene
1988 supra, targa, turbo, auto, TEMS, all the cool stuff

mrnickleye · 02-11-2006, 01:53 AM

Pop an 02 sensor in, because it is the main sensor for fuel mixture. It actually should be changed every few years anyway, or 60k miles.
This has always been recommended maintenance.

Also, I ready a report/study that was done for the government, and it claimed the USA could save 10 billion barrels of oil per year if vehicles got a new 02 every 3 years.

ddmcse · 02-11-2006, 02:36 AM

i ran into this a couple of summer s ago

i replaced the oxygen sensor but it didn't help
i replaced the 2 vsv valves( fuel and egr )on the intake side . that smoothed it out .
i use an air/fuel gauge and it let me know i had the problem to begin with

stumpjumper · 02-11-2006, 02:40 AM

What kind of gas mileage should it get on the highway without a lead foot??

I get about 20 mpg and I smell gas. I assume this is the same problem mentioned here.

mrnickleye · 02-11-2006, 11:39 PM

20-25mpg hwy seems to be the norm. You should not be smelling fuel. You may have a leak at some hose or fitting.

kewlcoconut · 02-12-2006, 03:17 AM

yea i would check out the 02 sensor. thats the first thing that i went to when i was running rich. i noticed that i was getting really crappy mileage. so i popped in a new one, and its sooo much better. (well not anymore cuz my HG blew, so its not moving haha). but when i changed it, it made a huge difference. i converted the mpg figures, and i should average about 400kms per tank. and i get better than that now. almost 450, so im pretty happy about it all.

stumpjumper · 02-12-2006, 08:49 PM

Thanks for the info. I'll be replacing that O2 sensor for sure now.

02-10-2006, 05:24 AM	#1
brad mccarty Stock Join Date: Feb 2006 Location: montague tx Posts: 5	Burning rich need supra help My 88 supra turbo is using alot of gas like more than it is sopposed to and is burnning rich im thinking o2 sensor, has anyone ever had this problem any help would be great.. New to the supra scene 1988 supra, targa, turbo, auto, TEMS, all the cool stuff

02-11-2006, 01:53 AM	#2
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Pop an 02 sensor in, because it is the main sensor for fuel mixture. It actually should be changed every few years anyway, or 60k miles. This has always been recommended maintenance. Also, I ready a report/study that was done for the government, and it claimed the USA could save 10 billion barrels of oil per year if vehicles got a new 02 every 3 years. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

02-11-2006, 02:36 AM	#3
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	i ran into this a couple of summer s ago i replaced the oxygen sensor but it didn't help i replaced the 2 vsv valves( fuel and egr )on the intake side . that smoothed it out . i use an air/fuel gauge and it let me know i had the problem to begin with __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

02-11-2006, 11:39 PM	#5
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	20-25mpg hwy seems to be the norm. You should not be smelling fuel. You may have a leak at some hose or fitting. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

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02-11-2006, 02:40 AM	#4
stumpjumper 3" Exhaust Join Date: Dec 2005 Posts: 74	What kind of gas mileage should it get on the highway without a lead foot?? I get about 20 mpg and I smell gas. I assume this is the same problem mentioned here.

02-12-2006, 03:17 AM	#6
kewlcoconut 3" Exhaust Join Date: Sep 2005 Location: Vancouver, BC Canada Posts: 157	yea i would check out the 02 sensor. thats the first thing that i went to when i was running rich. i noticed that i was getting really crappy mileage. so i popped in a new one, and its sooo much better. (well not anymore cuz my HG blew, so its not moving haha). but when i changed it, it made a huge difference. i converted the mpg figures, and i should average about 400kms per tank. and i get better than that now. almost 450, so im pretty happy about it all.

02-12-2006, 08:49 PM	#7
stumpjumper 3" Exhaust Join Date: Dec 2005 Posts: 74	Thanks for the info. I'll be replacing that O2 sensor for sure now.