Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra

Reply
 
Thread Tools Display Modes
Old 04-16-2011, 05:05 AM   #1
Daluz
Stock
 
Join Date: Apr 2011
Location: Seminole, Florida
Posts: 22
Daluz is on a distinguished road
Default Spark problems

So i just bought a supra two days ago, and the only problem that it seems to be having is that every time i turn the car off it fouls the plugs. so every time i have to change them, it seems to be a carbon build up instead of oil, what could this be? bad air/gas ratio?
Daluz is offline   Reply With Quote
Old 04-16-2011, 07:58 AM   #2
Sonyps307
Lexus & 550's
 
Join Date: May 2010
Location: Baltimore
Posts: 526
Sonyps307 is on a distinguished road
Default

Maybe o2 sensor
Sonyps307 is offline   Reply With Quote
Old 04-16-2011, 12:55 PM   #3
Daluz
Stock
 
Join Date: Apr 2011
Location: Seminole, Florida
Posts: 22
Daluz is on a distinguished road
Default

yeah i was thinking bad o2 sensors, or a bad MAF sensor
Daluz is offline   Reply With Quote
Old 04-16-2011, 01:19 PM   #4
GT-A
Stock
 
Join Date: Apr 2011
Location: Australia
Posts: 2
GT-A is on a distinguished road
Smile See a pro.

That doesn't make sense! Plugs are not fouled after shut down unless you have multiple injectors leaking. Which is very unlikely. Make sure that the plugs are the correct specification for your engine. Yes O2 sensors are a common problem on a vehicles this age, although there are several area's which may cause your engine to run rich. Have your engine tune checked by a trusted professional. I doubt you'll be up for big dollars.
GT-A is offline   Reply With Quote
Old 04-16-2011, 03:13 PM   #5
Daluz
Stock
 
Join Date: Apr 2011
Location: Seminole, Florida
Posts: 22
Daluz is on a distinguished road
Default

thanks, well i just started the car up with the new plugs he gave me and they are already fouled, idk whats wrong with it. also it takes for ever to start up, hald the time you have to pump the accelerator untill it stays running
Daluz is offline   Reply With Quote
Old 04-17-2011, 12:30 AM   #6
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

Post pictures of the plugs. Is the oil coming from the plug galley (the oil on them will be wet and it'll be on the end of the plug wires too)?
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 04-17-2011, 03:16 AM   #7
Daluz
Stock
 
Join Date: Apr 2011
Location: Seminole, Florida
Posts: 22
Daluz is on a distinguished road
Default

its not oil its carbon, its like powdery not wet and sticky so thats why i know its a bad fuel air ratio but i dont know what all can make carbon fouling. someone told me to check my igniter could it be that
Daluz is offline   Reply With Quote
Old 04-19-2011, 06:09 AM   #8
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

If your mixture's that far off you'll be smoking like a 3400lb cigar on the road. Igniter's worth looking at so is the cold start injector, the AFM, the coil pack wiring (particularly the ground) and knock sensors and their wiring.

Have you checked for diagnostic codes yet?
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 04-20-2011, 09:36 PM   #9
Daluz
Stock
 
Join Date: Apr 2011
Location: Seminole, Florida
Posts: 22
Daluz is on a distinguished road
Default

where is the o2 sensor located on a base model i cant find it anywhere
Daluz is offline   Reply With Quote
Old 04-20-2011, 10:50 PM   #10
Daluz
Stock
 
Join Date: Apr 2011
Location: Seminole, Florida
Posts: 22
Daluz is on a distinguished road
Default

Alright so i found where my 02 sensor goes i have the pace setter full exhaust so its on the down pipe, its blocked off, i just got my new 02 sensor in also, but the thing is i cant find the wiring connecting to the 02 sensor so i have nothing to plug it up to, can somebody help me

Last edited by Daluz; 04-20-2011 at 10:54 PM.
Daluz is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
No spark issues DDBT MKII Supra 2 01-06-2009 07:08 AM
problems problems problems.... 86SupraMan MKIII Supra 5 02-04-2008 04:28 PM
NGK Spark Plugs 91 Supra MKIII Supra 5 08-07-2007 04:52 AM
Starting problems and accleration problems! alekjame22 MKIII Supra 6 03-17-2007 11:19 PM
problems, problems, and problems tone loc MKIII Supra 6 09-06-2006 05:35 AM


All times are GMT. The time now is 06:42 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86