Go Back   Ford Mustang Forums > Mustang > V6 Mustang > V6 Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

1979-2004 V6 Mustang Tech Discussions

V6 Forums | V6 Talk | V6 Tech | 2005+ V6 Tech | V6 Pictures | Introductions | General Tech | Lounge 


Reply   Post New Thread
Unread 03-05-2011   #1 (permalink)
RIFF is offline Rookie


Joined: Mar 2011
Posts: 4 Threads: 2
 RIFF's Country Flag
clearfield   Utah
RIFF is on a distinguished road
Default 95 v6 cooling system issues.

Hello new member here. I just purchased my first mustang its a 95 v6 3.8L manual, completely stock. I cannot find a solution to my problem, i have been online for two days reading forums and am now desperate, so here it goes.
The solution search started with me noticing that my temp gauge does not work needle will not move at all and is stuck at C i have checked my fuses and they are all good. I then noticed that my coolant spillover tank was bone dry (radiator was full) i did a coolant fill following all the steps in my haynes manual and found that coolant is flowing (the upper hose got hot) there are no leaks and the coolant i could see in the radiator looked clean. In this process i noticed that my cooling fan would not turn on, i left the car at idle for a good twenty minutes so i assume the engine got hot enough to trigger it. also check engine light is on. car runs great and does not show signs of overheating.
I would like to know what the possible causes are for these my guess from what i have been reading would be Coolant temp sensor, PCM, CCRM, and maybe the thermostat i do not know what or where the PCM is there is no explanation in my manual and cant find any specifics online as to where it is. Is there anything else i should check out and how do i test these? can any of these cause these problems alone or is it most likely a combination of more than one. I need to know where to start or if i am even headed in the right direction.
Thanks much
RIFF is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 03-05-2011   #2 (permalink)
kawik99 is offline GT Member

V6 Member
4.6L Member


Joined: Jul 2008
Posts: 1,550 Threads: 50
 kawik99's Country Flag  View kawik99's 142 photos
Exeter   Pennsylvania
kawik99 is on a distinguished road
Default

the cts (coolent temp sensor) will pop a code on your dash. you should pull a wire diagram up and see where it feeds. the sensor could test good. but the wire is bad. a garage will beable to lock on the cts and see what its reading while the cars running.
__________________
35th Anni. Laser Red 3.8 coupe
ET: 1/8-9.892 @71.57 ET: 1/4-15.452 @88.06
4.6 stick ETs coming Sept 12th

98 Ranger XLT 4x4 Oxford White 3.0 M/T
kawik99 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 03-06-2011   #3 (permalink)
RIFF is offline Rookie


Joined: Mar 2011
Posts: 4 Threads: 2
 RIFF's Country Flag
clearfield   Utah
RIFF is on a distinguished road
Default

Thank you for the reply but im not quite sure what a garage is in auto tech terms.
RIFF is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 03-06-2011   #4 (permalink)
RIFF is offline Rookie


Joined: Mar 2011
Posts: 4 Threads: 2
 RIFF's Country Flag
clearfield   Utah
RIFF is on a distinguished road
Default

Oh and i forgot.. the A/C compressor is seized and no longer connected i dont know if that would cause the cooling fan to not work or the temp gauge either but that would throw a check engine light wouldnt it? and the heater works just fine as well
RIFF is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 03-06-2011   #5 (permalink)
kawik99 is offline GT Member

V6 Member
4.6L Member


Joined: Jul 2008
Posts: 1,550 Threads: 50
 kawik99's Country Flag  View kawik99's 142 photos
Exeter   Pennsylvania
kawik99 is on a distinguished road
Default

some autopart stores will hook up their scan tool to your car and tell you your trouble codes.... start their
__________________
35th Anni. Laser Red 3.8 coupe
ET: 1/8-9.892 @71.57 ET: 1/4-15.452 @88.06
4.6 stick ETs coming Sept 12th

98 Ranger XLT 4x4 Oxford White 3.0 M/T
kawik99 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 03-06-2011   #6 (permalink)
wmburns is offline BOSS Member


Joined: Sep 2010
Posts: 4,780 Threads: 0
 wmburns's Country Flag
Houston   Texas
wmburns is a jewel in the roughwmburns is a jewel in the roughwmburns is a jewel in the roughwmburns is a jewel in the rough
Default

I generally do not answer posts for cars older than 96 because I do not have a set of service manuals.

I will attempt to answer the questions I can.

The PCM is located in the right hand kick panel.

When the AC is off, the cooling fan turns on/off depending upon engine temperature.

I do not know if the 95 model year uses a coolant temperature sensor or a cylinder head temperature sensor (CHT). Why is that important? Because if there is air in the cooling system and a coolant temp sensor is used, the sensor will read low. Why? Because the sensor is in contact with air instead of water.

This should be high on your list since you reported the dash temperature guage reads low.

The V6 is prone to air being trapped in the engine. The V6 will overheat if the coolant refilling procedures are not followed.

In later model years, Ford switched to the cylinder head temperature sensor to avoid issues with the sensor reading low under certain conditions.

In response to comments about a bad temperature sensor thowing a DTC code, be careful here. The 95 MY is not a true ODB2 PCM. It may not behave the same as latter MY cars based on a full ODB2 PCM.

My recommendations. Start with the basics. Is the cooling system tight? Will it hold pressure? What is the condition of the radiator cap?

Does the head gasket leak? Is it using coolant?

Have the coolant re-fill procedures been followed and all of the air removed from the engine vent? Does the top radiator hose get hard when the motor is hot? Is the top radiator hose full of coolant or air?

It's called a cooling system because there are many parts involved. Each has function to do and some symptoms can have multiple causes. So start with the basics and work up from there. Go where the symptoms lead.
__________________
2003 GT Convertible (sold)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.
wmburns is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

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