Starting problem 2002 mustang gt - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 11-20-2015, 07:20 PM   #1
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Starting problem 2002 mustang gt

Ok so after work went to start up the car turn the key made a fast clicking sound then lost all power finally got it started with some cables and made it all the way home turned the car off then I tried to start it again and it did the same thing got it jump with cables again let it idle then finally took the battery to auto zone and try said the battery is 100% charged ?? Any one might know what's going on ?? Thanks


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-20-2015, 07:21 PM   #2
Registered Member

Regular
 
oxford5pointoh's Avatar
 
Join Date: Jan 2015
Location: Murica
Region: Other
Posts: 4,069
Alternator is bad
oxford5pointoh is offline   Reply With Quote
Old 11-20-2015, 07:24 PM   #3
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Quote:
Originally Posted by oxford5pointoh View Post
Alternator is bad

So the alternator is bad and it's just giving me enough juice when I finally get it started to drive


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-20-2015, 07:27 PM   #4
Registered Member
Regular
 
escottcarp's Avatar
 
Join Date: Jan 2013
Location: Jackson
Region: Mississippi
Posts: 365
Loose connections around the battery.

Once, the wire going to the positive terminal was loose at the terminal. My car had the same symptoms. Easy fix.
escottcarp is offline   Reply With Quote
Old 11-20-2015, 07:29 PM   #5
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 7,415
Inspect your battery cables for corrosion and loose connections... Particularly the ground.
straybullitt is offline   Reply With Quote
Old 11-20-2015, 07:33 PM   #6
Registered Member

Regular
 
oxford5pointoh's Avatar
 
Join Date: Jan 2015
Location: Murica
Region: Other
Posts: 4,069
Quote:
Originally Posted by smsstang View Post
So the alternator is bad and it's just giving me enough juice when I finally get it started to drive


Sent from my iPhone using Mustang Evolution

Yeah it could be the alternator is bad, internal regulator is bad (in the alternator), or it could be a bad or lose connection as stated above.

If the alternator is bad, the car is running on battery power but the alternator isn't doing its part to replace that charge. But if the battery isn't actually dying then it is probably something else.

If you have a multimeter I would start it and see what the voltage looks like while it's running vs what it looks like when it's off. You should have 13~ volts on and around 12.3-12.8 when it's off. If you do then you know your alternator is charging and you know your battery is good. This only leaves the connections or some other type of electrical problem
oxford5pointoh is offline   Reply With Quote
Old 11-20-2015, 08:13 PM   #7
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Yeah I just checked the alternator while running with a meter and it was at 13-14 volts I even took off the positive and it still ran off the alternator . I unhooked the battery cables and gonna let it sit over night and test the power . My connectis do look like there loose and some wire is not all the way intact with the clamp ?


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-20-2015, 08:26 PM   #8
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Quote:
Originally Posted by oxford5pointoh View Post
Yeah it could be the alternator is bad, internal regulator is bad (in the alternator), or it could be a bad or lose connection as stated above.

If the alternator is bad, the car is running on battery power but the alternator isn't doing its part to replace that charge. But if the battery isn't actually dying then it is probably something else.

If you have a multimeter I would start it and see what the voltage looks like while it's running vs what it looks like when it's off. You should have 13~ volts on and around 12.3-12.8 when it's off. If you do then you know your alternator is charging and you know your battery is good. This only leaves the connections or some other type of electrical problem

After I took the battery to the auto parts and bring it back before I hooked it back up I cleaned the positiv and negative with a kit cleaner and bristle hooked everything back up and it started both times when I started it again ?


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-20-2015, 08:26 PM   #9
Registered Member

Regular
 
oxford5pointoh's Avatar
 
Join Date: Jan 2015
Location: Murica
Region: Other
Posts: 4,069
Quote:
Originally Posted by smsstang View Post
Yeah I just checked the alternator while running with a meter and it was at 13-14 volts I even took off the positive and it still ran off the alternator . I unhooked the battery cables and gonna let it sit over night and test the power . My connectis do look like there loose and some wire is not all the way intact with the clamp ?


Sent from my iPhone using Mustang Evolution

Bingo. There's your problem then
oxford5pointoh is offline   Reply With Quote
Old 11-21-2015, 01:33 AM   #10
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
My battery light also has been coming on but goes on and off while driving ? What could this meen !


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-21-2015, 07:19 PM   #11
Registered Member
Regular
 
jeno's Avatar
 
Join Date: May 2015
Location: san antonio texas
Posts: 1,069
Quote:
Originally Posted by smsstang View Post
My battery light also has been coming on but goes on and off while driving ? What could this meen !


Sent from my iPhone using Mustang Evolution

Alternator ,battery ,bad ground


Sent from my 2003 rocketstang using Mustang Evolution
jeno is offline   Reply With Quote
Old 11-22-2015, 05:15 PM   #12
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Okay after messing with the cables wire and clamps the car is turning on and driving just like before ... But the battery light is still coming on then it shuts off then it comes back on ? I don't know what could be causing this


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-22-2015, 05:48 PM   #13
Registered Member
Regular
 
escottcarp's Avatar
 
Join Date: Jan 2013
Location: Jackson
Region: Mississippi
Posts: 365
Alternator is going bad.

Most auto retailers can test it to confirm it is bad after you remove it from your car.
escottcarp is offline   Reply With Quote
Old 11-22-2015, 05:50 PM   #14
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Ok so need to just get a new altenator . What kinds are good to get


Sent from my iPhone using Mustang Evolution

---------- Post added at 05:50 PM ---------- Previous post was at 05:49 PM ----------

Ok so what kind of altenator or what brand to get ?


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-22-2015, 05:57 PM   #15
Registered Member
Regular
 
fomoco4life's Avatar
 
Join Date: Aug 2012
Location: Antioch
Region: California
Posts: 839
Prolly just ur battery bro

Sent from my HTC One using Mustang Evolution mobile app

---------- Post added at 04:57 PM ---------- Previous post was at 04:56 PM ----------

Quote:
Originally Posted by fomoco4life View Post
Prolly just ur battery bro

Sent from my HTC One using Mustang Evolution mobile app
Have AutoZone or whoever check batt and alt, but I bet it's only batt

Sent from my HTC One using Mustang Evolution mobile app
fomoco4life is offline   Reply With Quote
Old 11-22-2015, 06:09 PM   #16
Registered Member
Regular
 
Slater2111's Avatar
 
Join Date: Dec 2014
Location: Jacksonville
Region: Florida
Posts: 1,001
Starting problem 2002 mustang gt

My battery light was on when I bought my car. I ended up replacing the alternator with a reman motorcraft one. I narrowed it down to the alternator using my X4 tuner and monitoring the voltage output while driving. At 12.2 volts you ain't charging anything.

Also a bad alternator is a very good way to kill a brand spanking new battery.

2003 GT: JLT CAI, summit 75mm TB, C&L plenum, 24# injectors, Mac Prochamber, SLP LM1 cat back, 3.73 Gears, FR500 Diff, FR500 diff cover, Jmod trans and shift kit, Max Motorsports subframes, Koni oranges front and rear, DBA discs front and rear, shrader performance rear seat delete, APSX D2 wideband, MPT happy customer.
Slater2111 is offline   Reply With Quote
Old 11-22-2015, 06:46 PM   #17
Registered Member
Regular
 
escottcarp's Avatar
 
Join Date: Jan 2013
Location: Jackson
Region: Mississippi
Posts: 365
Heck, it's easier to remove the battery. So, check that first.
escottcarp is offline   Reply With Quote
Old 11-23-2015, 01:12 PM   #18
Registered Member
Regular
 
fomoco4life's Avatar
 
Join Date: Aug 2012
Location: Antioch
Region: California
Posts: 839
Quote:
Originally Posted by escottcarp View Post
Heck, it's easier to remove the battery. So, check that first.
Exactly, and batteries actually only last a few years, I've been through 3 already, still on stock alternator. If you could get the car started, just drive it down there and let them check both while still mounted in the car

Sent from my HTC One using Mustang Evolution mobile app
fomoco4life is offline   Reply With Quote
Old 11-23-2015, 01:23 PM   #19
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
I've already gotten the battery checked and they said the battery is good ?


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-23-2015, 01:51 PM   #20
Registered Member
Regular
 
Slater2111's Avatar
 
Join Date: Dec 2014
Location: Jacksonville
Region: Florida
Posts: 1,001
Maybe it's the alternator.


2003 GT: JLT CAI, summit 75mm TB, C&L plenum, 24# injectors, Mac Prochamber, SLP LM1 cat back, 3.73 Gears, FR500 Diff, FR500 diff cover, Jmod trans and shift kit, Max Motorsports subframes, Koni oranges front and rear, DBA discs front and rear, shrader performance rear seat delete, APSX D2 wideband, MPT happy customer.
Slater2111 is offline   Reply With Quote
Old 11-23-2015, 02:41 PM   #21
Registered Member
Regular
 
XSlashDashX's Avatar
 
Join Date: Nov 2011
Location: Silsbee
Region: Texas
Posts: 1,224
Replace the Alternator. Had the same problem in my GF car. Battery light would come on and battery would be tested good. Turned out alternator was bad. Replaced and not had the battery light come back on.

Sent from my LGLS990 using Mustang Evolution mobile app
XSlashDashX is offline   Reply With Quote
Old 11-23-2015, 02:54 PM   #22
Registered Member
Regular
 
escottcarp's Avatar
 
Join Date: Jan 2013
Location: Jackson
Region: Mississippi
Posts: 365
Post #7 says you are getting 13-14 volts while the engine is running. Are you still getting that?

Wires/connections good? Yes
Battery good? Yes
Alternator good?
escottcarp is offline   Reply With Quote
Old 11-23-2015, 03:35 PM   #23
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Quote:
Originally Posted by escottcarp View Post
Post #7 says you are getting 13-14 volts while the engine is running. Are you still getting that?

Wires/connections good? Yes
Battery good? Yes
Alternator good?

Yes when I got out the volt meter I check the alternator while car was running and it was between 13-14 volts and battery about the same . Unhooked the battery let it sit over night and check it in the morning and the battery was at 12.7 .


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-23-2015, 08:58 PM   #24
Registered Member
Regular
 
escottcarp's Avatar
 
Join Date: Jan 2013
Location: Jackson
Region: Mississippi
Posts: 365
Well, I think most subscribers reading this thread will still believe the alternator is going bad at least.

Have you tried putting a big load on the alternator to see if your voltage/warning light stays low/stays on? I'd see what happens when the lights, stereo and a/c are running simultaneously.

If the trouble indicators stay on with those accessories turned on, I'd replace that alternator.

If there is no change in the trouble indicators, we'll need more info to make a definitive diagnosis.

(I went through this same hassle with an old MG Midget. After about a month of dealing with the problem and changing batteries twice, I finally correctly determined I needed a new ECU.)
escottcarp is offline   Reply With Quote
Old 11-24-2015, 10:01 PM   #25
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Quote:
Originally Posted by escottcarp View Post
Well, I think most subscribers reading this thread will still believe the alternator is going bad at least.

Have you tried putting a big load on the alternator to see if your voltage/warning light stays low/stays on? I'd see what happens when the lights, stereo and a/c are running simultaneously.

If the trouble indicators stay on with those accessories turned on, I'd replace that alternator.

If there is no change in the trouble indicators, we'll need more info to make a definitive diagnosis.

(I went through this same hassle with an old MG Midget. After about a month of dealing with the problem and changing batteries twice, I finally correctly determined I needed a new ECU.)

Yes but when I did the test but have the car running then taking off the positive terminal to the battery the car still ran ? So would this show my alternator is good ??


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-24-2015, 10:56 PM   #26
Registered Member
Regular
 
escottcarp's Avatar
 
Join Date: Jan 2013
Location: Jackson
Region: Mississippi
Posts: 365
It's an easy check to put a load on your electrical system. While the engine us running-Turn on the hi -watt users: A/C, lights, stereo up loud, defroster. Does the battery light stay on or stay on longer than 'normal' when all of those accessories are running? If so, the alternator is either bad or going bad.

Also, does the battery light turn off or stay off when driving? Maybe it turns off above 1500 rpm?

We haven't asked if you have any trouble codes. I assume you don't. Right?

I do wonder if the alternator voltage output can be fairly constant (13-14) even if the alternator amps output is low.
escottcarp is offline   Reply With Quote
Old 11-24-2015, 11:14 PM   #27
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Quote:
Originally Posted by escottcarp View Post
It's an easy check to put a load on your electrical system. While the engine us running-Turn on the hi -watt users: A/C, lights, stereo up loud, defroster. Does the battery light stay on or stay on longer than 'normal' when all of those accessories are running? If so, the alternator is either bad or going bad.

Also, does the battery light turn off or stay off when driving? Maybe it turns off above 1500 rpm?

We haven't asked if you have any trouble codes. I assume you don't. Right?

I do wonder if the alternator voltage output can be fairly constant (13-14) even if the alternator amps output is low.

The battery light comes on when driving and goes off when driving and no check engine light is on ?


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-25-2015, 06:48 PM   #28
Registered Member
Regular
 
Join Date: Jun 2015
Location: HARTWELL LAKE AREA
Region: South Carolina
Posts: 435
Sounds like a bad diod trio in alt
ALLYDRIVER1 is offline   Reply With Quote
Old 11-25-2015, 06:50 PM   #29
ME Bloodhound
Staff
 
Soccerluvr4's Avatar
 
Join Date: Feb 2012
Location: Sacramento/Bay Area
Region: California
Posts: 14,672
Quote:
Originally Posted by escottcarp View Post
It's an easy check to put a load on your electrical system. While the engine us running-Turn on the hi -watt users: A/C, lights, stereo up loud, defroster. Does the battery light stay on or stay on longer than 'normal' when all of those accessories are running? If so, the alternator is either bad or going bad.

Also, does the battery light turn off or stay off when driving? Maybe it turns off above 1500 rpm?

We haven't asked if you have any trouble codes. I assume you don't. Right?

I do wonder if the alternator voltage output can be fairly constant (13-14) even if the alternator amps output is low.
Quote:
Originally Posted by ALLYDRIVER1 View Post
Sounds like a bad diod trio in alt
This ^^^^^^
__________________

Bullitt build paused pending graduation

HID end all thread
Soccerluvr4 is offline   Reply With Quote
Old 11-25-2015, 08:15 PM   #30
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Okay is it better to just get the alternator rebuilt or buy one from LMR,AM Etc....?


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Old 11-25-2015, 10:21 PM   #31
Registered Member
Regular
 
Join Date: Jun 2015
Location: HARTWELL LAKE AREA
Region: South Carolina
Posts: 435
Just get checked at advance, if bad just buy their "new" one no rebuilt. Save a couple hundred dollars over ford price
.
ALLYDRIVER1 is offline   Reply With Quote
Old 11-26-2015, 12:30 AM   #32
Registered Member
Regular
 
smsstang's Avatar
 
Join Date: Sep 2014
Location: houston
Region: Texas
Posts: 238
Ok thanks


Sent from my iPhone using Mustang Evolution
smsstang is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Tags
2002 mustang

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 On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help pls 2002 not starting 671stang Pre-2005 V6 Mustang 0 12-15-2013 06:29 AM
2002 mustang gt starting problems Mustangloverv8 1996-2004 Mustang GT 2 11-03-2011 07:55 PM
New owner, 2002 Mustang starting problems skelaw Pre-2005 V6 Mustang 6 02-22-2011 07:57 PM
Classic mustang - problem starting? annawan Classic Mustangs 4 04-06-2010 12:19 AM
2002 mustang gt vs 2002 eclipse gt? diwali General Car Discussion 3 08-22-2009 06:58 AM

» Like Us On Facebook



04:25 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.