2002 mustang gt Idle problem - Ford Mustang Forum
Reply
 
LinkBack Thread Tools
post #1 of 32 (permalink) Old 11-07-2011 Thread Starter
Rookie
 
elgessi's Avatar
 
Joined: Oct 2010
Location: Panhandle
Posts: 37
 
2002 mustang gt Idle problem

I know this problem is very common in mustangs. I read various threads on the forum. My idle is very inconsistent all day. I replaced my MAF and PCV. I checked my EGR and it was good as well. I cleaned my IAC but the idle continued to be inconsistent. Today it finnaly threw codes at me and their p0420, p0430, p1000, and p1125. ANy suggestions. Im thinking of purchasing a new IAC valve but i read on threads it still didn't fix the idle. THanks everyone!
elgessi is offline  
Sponsored Links
Advertisement
 
post #2 of 32 (permalink) Old 11-08-2011
Rookie
 
JullioS281's Avatar
 
Joined: Nov 2011
Location: Baja California Sur
Posts: 24
 
to fix this problem, i went up the acceleration control a bit to keep the rpm in the 900, which is attached to the throttle body, I know that is not the correct way to fix it, but at least keeps the rpm normal while i solve the problem.
how do i know its in the 900, i used the gauges control..
hope this helps man

2001 Silver Mustang GT
-5 Speed.
-Racing Clutch.
-3.73 Gears.
JullioS281 is offline  
post #3 of 32 (permalink) Old 11-08-2011
Apprentice
4.6L Member
 
Kaleo's Avatar
 
Joined: Nov 2011
Location: Kamuela
Posts: 63
 
Dude look at the thred paj posted it has all the codes you need hope this helps .
Kaleo is offline  
post #4 of 32 (permalink) Old 11-08-2011
Top Dog
4.6L Member
 
sillyrabbit0420's Avatar
 
Joined: Aug 2009
Location: Colorado Springs
Posts: 3,712
 
Ok... This thread is borderline illiterate, but whatever.

CLEANING the IAC doesn't work.
REPLACING the IAC is recommended. Replace only with an OEM IAC.
sillyrabbit0420 is offline  
post #5 of 32 (permalink) Old 11-08-2011
Top Dog
4.6L Member
 
sillyrabbit0420's Avatar
 
Joined: Aug 2009
Location: Colorado Springs
Posts: 3,712
 
Those codes have nothing to do with the IAC...
Your car is just a piece of sh*t.
sillyrabbit0420 is offline  
post #6 of 32 (permalink) Old 11-08-2011
SHELBY GT 350 Member
 
BlueStreak03's Avatar
 
Joined: Nov 2002
Location: Trinity
Posts: 5,944
 
Send a message via AIM to BlueStreak03 Send a message via Yahoo to BlueStreak03
Sounds like you need a new TPS and a pair of MIL eliminators for that offroad midpipe you're running.

"Posterity! You will never know how much it cost the present Generation to preserve your Freedom! I hope you will make good use of it. If you do not, I shall repent in Heaven, that I ever took half the Pains to preserve it."

John Adams
BlueStreak03 is offline  
post #7 of 32 (permalink) Old 11-08-2011
Apprentice
 
elbarto's Avatar
 
Joined: Apr 2008
Location: St. Paul
Posts: 133
 
Quote:
Originally Posted by BlueStreak03 View Post
Sounds like you need a new TPS and a pair of MIL eliminators for that offroad midpipe you're running.
If you read through the sticky at the top of this forum about the idle issues that are common that will start you on the right direction.... Also looking at your DTC codes that you posted should have given you another hint. TPS seem to have issues and cause idle problems. I don't think the codes for you catalytic converter would cause problems with your idle but who knows.
elbarto is offline  
post #8 of 32 (permalink) Old 11-08-2011 Thread Starter
Rookie
 
elgessi's Avatar
 
Joined: Oct 2010
Location: Panhandle
Posts: 37
 
I just replaced my IAC valve. Now my Idle is super high! The car seem to run better but the idle will not drop from 2k. any suggestions??
elgessi is offline  
post #9 of 32 (permalink) Old 11-08-2011
Top Dog
4.6L Member
 
sillyrabbit0420's Avatar
 
Joined: Aug 2009
Location: Colorado Springs
Posts: 3,712
 
Disregard my earlier post. I was crabby this morning.
What, if any, mods are on the car?
sillyrabbit0420 is offline  
SHELBY GT 350 Member
Classic Member
4.6L Member
 
SoCal2V's Avatar
 
Joined: Sep 2010
Location: Hell
Posts: 6,799
 
Quote:
Originally Posted by sillyrabbit0420 View Post
Disregard my earlier post. I was crabby this morning.
What, if any, mods are on the car?
I prefer that post, best answer I've seen here in weeks.


2001 GT Convertible

All the usual bolt-ons
1967 Coupe
200 I6, C4
SoCal2V is offline  
post #11 of 32 (permalink) Old 11-08-2011 Thread Starter
Rookie
 
elgessi's Avatar
 
Joined: Oct 2010
Location: Panhandle
Posts: 37
 
I got CAI, off-road xpipe, catback, SCT tune. I just thought by replacing the IAC it would fix my loping idle, but the new part just made my RPMs rise higher. Im at a point that I just dont know what to do.
Its funny when I'm at a red light everybody turns to see me because they think im reving it. hahaha
elgessi is offline  
Top Dog
4.6L Member
 
sillyrabbit0420's Avatar
 
Joined: Aug 2009
Location: Colorado Springs
Posts: 3,712
 
Quote:
Originally Posted by elgessi View Post
I got CAI, off-road xpipe, catback, SCT tune. I just thought by replacing the IAC it would fix my loping idle, but the new part just made my RPMs rise higher. Im at a point that I just dont know what to do.
Its funny when I'm at a red light everybody turns to see me because they think im reving it. hahaha
Have you checked all your vaccuum lines and made sure everything's the way it's supposed to be?
The TPS could be the issue.
Your codes are related to your off-road pipe. They're saying low catalyst efficiency because you have no cats. Either have them tuned out, or get some MIL eliminators as stated.
When you said you relpaced the MAF, what MAF did you replace it with?
sillyrabbit0420 is offline  
post #13 of 32 (permalink) Old 11-08-2011 Thread Starter
Rookie
 
elgessi's Avatar
 
Joined: Oct 2010
Location: Panhandle
Posts: 37
 
well originally I had got fed up with this problem. So I took it to ford. They told me it was a bad MAF. I could not afford the OEM MAF. I bought a cardone MAF. I do not know why the catalyst is showing up in my DTC. I replaced the TPS about 2 1/2 yrs ago. My problem is that my idle is very high. I just can't find the damn problem.
elgessi is offline  
Made Member
 
Fillup96GT's Avatar
 
Joined: Aug 2010
Location: Plant City
Posts: 1,222
 
Quote:
Originally Posted by sillyrabbit0420 View Post
Disregard my earlier post. I was crabby this morning.
What, if any, mods are on the car?
Quote:
Originally Posted by SoCal2V View Post
I prefer that post, best answer I've seen here in weeks.
Haha not the best Ive seen in weeks but very good.

I prefer the posts with super troopers references

1996 Red Mustang GT - Sold back in 2012 after too much time and money was wasted on it.
Fillup96GT is offline  
Top Dog
4.6L Member
 
sillyrabbit0420's Avatar
 
Joined: Aug 2009
Location: Colorado Springs
Posts: 3,712
 
Quote:
Originally Posted by elgessi View Post
well originally I had got fed up with this problem. So I took it to ford. They told me it was a bad MAF. I could not afford the OEM MAF. I bought a cardone MAF. I do not know why the catalyst is showing up in my DTC. I replaced the TPS about 2 1/2 yrs ago. My problem is that my idle is very high. I just can't find the damn problem.
(sigh...) Awesome.
To find out if your MAF is bad, just unplug your MAF... If the car runs like total dogshit with the MAF unplugged, then your MAF is working.
That's why I never let anyone else work on my stuff.

Anyway... That's stupid.

The catalyst is showing up on your DTC because you don't have cats, dude. What have you done with your rear O2 sensors?

Are you certain your throttle body is stock?
sillyrabbit0420 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On

 
For the best viewing experience please update your browser to Google Chrome


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 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183