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 12-30-2009, 09:42 PM   #1
suprabahamut
3" Exhaust
 
Join Date: May 2007
Location: greensboro
Posts: 242
suprabahamut is on a distinguished road
Default Low idle

My idle is low when the car warms up. I am thinking it is the IAC valve. I shot some carburetor cleaner in the valve with the hose disconnected. A lot of junk cam out, but it is still idling low and sometimes surges till it cuts off it kind of ticks when it gets really low idle like 500 rpms. What do you guys think do you think it is the IAC or something else?
suprabahamut is offline   Reply With Quote
Old 12-31-2009, 06:09 AM   #2
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,038
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

Well, the ISCV is VERY easy to clean thoroughly, but just spraying carb cleaner through it won't necessarily reach where it needs to; Take the ISCV off and then take off the three screws, clean the area above the plunger and then lubricate it with a good lube... a molybdenum based grease will work well, but a dry teflon lube may collect less grime over time.

There are a few possibilities with any idle issue... I HATE idle issues, so I just go through a check list whether it's high or low:

1) check for vacuum leaks
2) check ISCV
3) check calibration of TPS
4) test TPS for flat spots (it is a wear component)
5) test TCCS temp sensor
6) test VAFM for flat spots

Oh, and as always, check for codes.
__________________
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
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
idle problems 88 supra turbo MKIII Supra 14 03-13-2010 03:43 AM
won't idle 3.0trd MKIII Supra 6 06-15-2009 07:23 PM
Finally, Idle Set! scruffboy Non-Generation Specific Questions 6 01-16-2007 02:39 PM
1987 Toyota Supra Idle spycialost9999 Non-Generation Specific Questions 3 06-14-2006 06:33 PM
HELP!!!! '87 Supra idle problem Morpho MKIII Supra 0 10-03-2005 02:40 PM


All times are GMT. The time now is 12:03 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, 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 87