Search



Go Back   MustangForums.com > Ford Mustang Tech > 4.6L (1996-2004 Modular) Mustang
Sign in using an external account
Register Forgot Password?
Search

4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.
Sponsored by Cruizin Concepts


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 07-20-2011, 12:45 PM   #1
00wigt
 
Join Date: Jul 2011
Vehicle: 2000 ford mustang gt
Location: minnesota
Posts: 13
Default 2000 mustang gt misfire

ok i have a 2000 mustang gt so i noticed one day my car had a little hesitation so i changed oil n plugs and coolant flush you know normal maintaince stuff previous plugs only had about 25k on them. anyways i went to autozone and got the motorcraft platinum oem plugs they said and put them in. got in car and seem to run fine and then after it got to running temp and was driven for a while the car started to miss like i floored it on interstate and the stuck at 5000 rpm and was just misfiring really bad and wouldnt pick up speed or go past 5k rpm so i thought ok maybe i got bad plugs bought new ones again and new boots and reinstalled and same thing! seems to run fine just when the car gets hot it misfires and the part that really drives me nuts is that there in no engine light! please help im going crazy another issue ive found is well its been about 95 degrees out and 115ish with heat index and when the car is stitting idling with a/c on it starts to overheat and the a/c blows warm and when u drive after a few min the temp starts going back down and the a/c blows cold again any ideas on that as well? thank you
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
00wigt is offline   Reply With Quote
Old 07-20-2011, 12:47 PM   #2
00wigt
 
Join Date: Jul 2011
Vehicle: 2000 ford mustang gt
Location: minnesota
Posts: 13
Default

its not only on interstate it misfires. if u get on gas from a stop it goes a little but pops and misfires n stuff its mainly at wide open throttle but u can feel it just pushing on gas a little bit
00wigt is offline   Reply With Quote
Old 07-20-2011, 01:11 PM   #3
00wigt
 
Join Date: Jul 2011
Vehicle: 2000 ford mustang gt
Location: minnesota
Posts: 13
Default

this is the plug i used http://www.autozone.com/autozone/par...4651_234847_0_
00wigt is offline   Reply With Quote
Old 07-20-2011, 03:22 PM   #4
cliffyk
TECH SAVANT

 
cliffyk's Avatar
 
Join Date: Dec 2006
Vehicle: 1998 SL500
Location: Saint Augustine, FL
Posts: 10,909
Default

Did you set the plug gap? It should be 0.052" to 0.056".

Were the COP boots in good condition, I.e. not hardened, cracked, or "burnt" smelling?

As to the AC, it sounds as though the refrigerant charge may be low.

The overheating could be that the engine cooling fan is not running as it should, that the radiator is partially clogged, or any of a number of other issues that really cannot be diagnosed remotely. If you are not experienced in cooling system diagnosis and repair take it to a local radiator shop and have then check it out.
__________________
-cliff knight-
SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum,
Delta Force tuned, Steeda UDPs, Ralco flywheel,
RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq


Engineering is, at its base, making what you want from what you have.
At its extreme it is making what you want from what you can get.

Last edited by cliffyk; 07-20-2011 at 03:27 PM.
cliffyk is offline   Reply With Quote
Old 07-20-2011, 10:32 PM   #5
00wigt
 
Join Date: Jul 2011
Vehicle: 2000 ford mustang gt
Location: minnesota
Posts: 13
Default

yes checked the gap the boots are new and the coils all look n smelled normal... im jw why there is no check engine light.
00wigt is offline   Reply With Quote
Old 07-21-2011, 06:10 AM   #6
cliffyk
TECH SAVANT

 
cliffyk's Avatar
 
Join Date: Dec 2006
Vehicle: 1998 SL500
Location: Saint Augustine, FL
Posts: 10,909
Default

You need to scan for any pending trouble codes, and check the crank and cam position sensors.

The crank sensor resistance (Key off, harness connected) should be between 300Ω and 800Ω. The cam position sensor cannot be as easily tested--just swap it out for a new one, they are only $20 or so at the FLAPS.

Also, failing and electrically "noisy" generators have been known to mess with the crank sensor signal--have the the generator load tested...
__________________
-cliff knight-
SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum,
Delta Force tuned, Steeda UDPs, Ralco flywheel,
RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq


Engineering is, at its base, making what you want from what you have.
At its extreme it is making what you want from what you can get.
cliffyk is offline   Reply With Quote
Old 07-21-2011, 06:10 AM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
04, 2000, 46, bad, ford, gt, hesitation, misfire, misfires, misfiring, miss, missfires, mustang, running, slight, stuff

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 01:36 PM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup