![SEARCH](http://www.mustangworks.com/images/search.png)
![The Mustang Works](http://www.mustangworks.com/images/mw_footer_logo.gif)
© Copyright 1995 thru 2008 - The Mustang Works™. All Rights Reserved.
MustangWorks.com is designed and hosted by Aero3 Media.
MustangWorks.com is designed and hosted by Aero3 Media.
![]() |
#1 |
Registered Member
Join Date: Jun 2000
Location: Pigeon Forge Tn
Posts: 611
|
![]() OK folks, I think I've already covered most of the basics on this one:
Car:93gt, pretty much bone stock. Symptoms: The car started idling a little rough two days ago, got worse yesterday. Also noticed that when you come off the gas, the idle doesent drop all the way back down to normal, it holds around 1k-1200 for a second or two, then drops again. With the car just sitting, the idle will slowly drop, then stumble and occasionally stall (but not always,some times it'll seem to just teeter on the brink) You can also smell gas in the exaust First thought was that it fouled a plug, (burns oil on 2 cyls) I check the usual cylinders, and indeed, one was looking pretty crappy, and the other was borderline. Replace them, cars's still doing it. So far I've: Checked all the other plugs, all ok, replaced cap,rotor, wires,and coil (I just did the coil on general principal, since as far as I know its original) Run throttle body cleaner through Checked timing (with the spout in it fluctuates with the idle, with it out its at a solid 10deg. Also noticed that if I give it gas with the spout out, it seems to be running really rich, I can hear popping and occasional backfiring in the exaust) Checked Vacuum, steady 13-14 lbs, Ran car with IAC unhooked, no noticible change, Ran car with MAF unhooked, car died after a few seconds (The MAF was also cleaned about 3 weeks ago, but I havent pulled it out again) I cant check the TPS, since i just found out that my multi meter is apparently dead ![]() KOER I get 12,94,34. (I just got my reader a few weeks ago, and its had the 34 I just havent had a chance to screw w/ the egr yet) Any ideas? Bad injector? Stuck open maybe? Thanks J Also, maybe unrelated, but maybe not, I also noticed a new noise coming from the engine, sounds like pass side, cant be any more specific, it sounds linda like a "tsk tsk" but seems to come and go(?).... __________________
__________________
____________ '66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit* '93 GT Mostly stock AKA "Fawkes" Rice Haters Club Member #239 "I find your lack of faith...disturbing." "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken |
![]() |
![]() |
![]() |
#2 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
|
![]() Sounds like a bad IAC valve to me. Its on the front of the throttle body and shaped like a cylinder. Remove it and clean it then if it still does it replace it.
__________________
92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
![]() |
![]() |
![]() |
#3 |
Registered Member
Join Date: Jun 2000
Location: Pigeon Forge Tn
Posts: 611
|
![]() If the IAC was bad, shouldn't disconnecting it have cleared the problem up?
I'm gonna go check it anyway tho...
__________________
____________ '66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit* '93 GT Mostly stock AKA "Fawkes" Rice Haters Club Member #239 "I find your lack of faith...disturbing." "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken |
![]() |
![]() |
![]() |
#4 |
Registered Member
Join Date: Jun 2000
Location: Pigeon Forge Tn
Posts: 611
|
![]() Well, cleaning it didn't help. It only had moderate carbon buildup, but I took the whole assy off, removed the solenoid/sensor end, and hosed the crap outta it with TB cleaner...
Would the whole thing or just the valve part need to be replaced?
__________________
____________ '66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit* '93 GT Mostly stock AKA "Fawkes" Rice Haters Club Member #239 "I find your lack of faith...disturbing." "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken |
![]() |
![]() |
![]() |
#5 |
Gimme a Drink!
Join Date: Dec 2002
Location: NYC
Posts: 694
|
![]() http://members.tripod.com/sparkplugs/idle.htm
http://www.50tech.com/articles/displ...p?catid=8&id=4 http://www.50tech.com/articles/displ...?catid=9&id=10
__________________
1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong! |
![]() |
![]() |
![]() |
#6 | |
Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
|
![]() Quote:
Yep! Idle Air Motor...........
__________________
d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... ![]() |
|
![]() |
![]() |
![]() |
#7 |
Registered Member
Join Date: Jun 2000
Location: Pigeon Forge Tn
Posts: 611
|
![]() Is there any way I can test to verify its hosed before popping $70 for a new one?
BTW, TPS was sitting at .93, I managed to get it up to .964, but thats about as high as it'll go.
__________________
____________ '66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit* '93 GT Mostly stock AKA "Fawkes" Rice Haters Club Member #239 "I find your lack of faith...disturbing." "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken Last edited by KiltedBanshees93GT; 09-11-2005 at 09:14 AM.. |
![]() |
![]() |
![]() |
#8 |
T.P.M. President
Join Date: May 2002
Location: Brownsville
Posts: 265
|
![]() You have to dremel out the screw holes a little so that you can twist the TPS a little more.
__________________
![]() |
![]() |
![]() |
![]() |
Thread Tools | |
Display Modes | Rate This Thread |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Adjusting Length of high idle on Carb 5.0 | twilightcall | Windsor Power | 8 | 08-06-2003 08:31 AM |
Car won't idle after supercharger install! | Stang_Crazy | Power Adders | 11 | 04-27-2003 12:45 PM |
347 Big Time Idle problem | 89FHPLX | Windsor Power | 2 | 01-15-2002 12:02 PM |
Problems with TFS engine combo..wont idle right and sputters when you give it throttl | dashapht | Windsor Power | 8 | 07-17-2001 12:23 AM |
I am over the idle deal | TomEboi | Modular Madness | 3 | 03-24-2001 03:57 PM |