1991 Mustang GT 5.0 Turns over but will not start - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 12 (permalink) Old 12-23-2011 Thread Starter
Rookie
 
KDOGGG67's Avatar
 
Joined: Dec 2010
Location: Oldsmar
Posts: 13
 
1991 Mustang GT 5.0 Turns over but will not start

Coming home from Christmas shopping in my 1991 Mustang GT 5.0 it suddenly died at a stop light. Like someone turned the key off. I tried to restart the car but all it does is turn over. I turned the key off and back on the fuel pump made it power up noise but it still is only turning over. It doesn't appear to be firing. Does anyone know the first basic checks to perform and the direction to take after these checks? I have a Haynes manaul but the wire diagram does not match this car. The wires on the T.F.I. ignition module do not match this manual.

I'll be online all night any helpful info will be appreciated.

Happy Holiday's
KDOGGG67 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 12-23-2011
PONY Member
4.6L Member
 
DJH1211's Avatar
 
Joined: May 2010
Posts: 483
 
The first check is the fuses. See your glovebox owner's manual for info. Blown fuse means something is wrong. But change it with a correct amperage one and see if it holds when you start the engine. If all works, great. Might have been a flukey problem. But carry spare fuses with you at all times.

If there's no blown fuses: I'd get at the easiest spark plug wire you can reach, and pull it. Put a good spark plug into the boot, and crank over the engine and see if you have a spark there (touch the ground electrode of the spark plug to a bare metal spot on the engine). That's to confirm if the ignition module is putting out. If not, check for power coming to the module. If there is, the module is suspect. If there is no power, then the ignition switch is suspect, even though the fuel pump gets power and the engine cranks.

These ideas are just to help you get started with the troubleshooting, and are general in nature.

SLITHER
DJH1211 is offline  
post #3 of 12 (permalink) Old 12-23-2011
Rookie
 
foxbody2292's Avatar
 
Joined: Jan 2011
Location: hudson
Posts: 48
 
try the ignition coil that same scenerio happend with me def let me know curiouse
foxbody2292 is offline  
post #4 of 12 (permalink) Old 12-23-2011 Thread Starter
Rookie
 
KDOGGG67's Avatar
 
Joined: Dec 2010
Location: Oldsmar
Posts: 13
 
All under the dash fuses look good. No spark from the ignition coil. I did the ohms test on the coil and the reading was good. Next test - I'll try to test the signal coming from the ignition module.

Thanks for the replies.
KDOGGG67 is offline  
post #5 of 12 (permalink) Old 12-23-2011
Banned
V6 Member
5.0L Member
 
tormenting5.0's Avatar
 
Joined: Nov 2003
Location: Cape May County
Posts: 849
 
Send a message via AIM to tormenting5.0 Send a message via Yahoo to tormenting5.0
Dead coil sounds like your issue.
tormenting5.0 is offline  
post #6 of 12 (permalink) Old 12-23-2011
Apprentice
 
martymar1082's Avatar
 
Joined: May 2011
Location: polk city
Posts: 161
 
Check to make sure uve got power to the coil. It will be the red wire the green is your trigger/tach wire. I thers power then its the module on the distributor not telling the coil to fire.

93 foxy gt, forged bottomend. Tfs h/c/rr. longtubes. vic jr airgap holley dp 750. Udp's and more...
martymar1082 is offline  
post #7 of 12 (permalink) Old 12-24-2011 Thread Starter
Rookie
 
KDOGGG67's Avatar
 
Joined: Dec 2010
Location: Oldsmar
Posts: 13
 
Red wire on the coil shows 12 volts. I'm thinking the ignition module or the PIP sensor.
KDOGGG67 is offline  
post #8 of 12 (permalink) Old 12-24-2011 Thread Starter
Rookie
 
KDOGGG67's Avatar
 
Joined: Dec 2010
Location: Oldsmar
Posts: 13
 
Module has 12 volt and a good ground. Looking for LED tester to check feed to the coil and the PIP sensor.
KDOGGG67 is offline  
post #9 of 12 (permalink) Old 12-24-2011 Thread Starter
Rookie
 
KDOGGG67's Avatar
 
Joined: Dec 2010
Location: Oldsmar
Posts: 13
 
I replaced the ignition module with a new one but this did not resolve my issue. Has anyone replaced a PIP sensor. Any instructions would be appreciated. Does the distributor needed removed?
KDOGGG67 is offline  
Apprentice
 
martymar1082's Avatar
 
Joined: May 2011
Location: polk city
Posts: 161
 
Jw have u checked the stupid stuff? Cap rotor wires make sure both wires are making good contact with the coil lugs.

93 foxy gt, forged bottomend. Tfs h/c/rr. longtubes. vic jr airgap holley dp 750. Udp's and more...
martymar1082 is offline  
Banned
4.6L Member
 
2Manystangs's Avatar
 
Joined: Mar 2009
Location: Tampa
Posts: 12,912
 
your first move is to pull a spark plug wire, now have someone crank the engine while you hold the wire boot near something metal...see if you see sparking: if so continue to step 2...
2: Next pull the hose off the throttle body and spray some starting fluid into the throttle body, see if the car will fire one time
You now know if it's spark or fuel, if it's not one of those, time to see a mechanic
2Manystangs is offline  
post #12 of 12 (permalink) Old 12-29-2011 Thread Starter
Rookie
 
KDOGGG67's Avatar
 
Joined: Dec 2010
Location: Oldsmar
Posts: 13
 
My issue was that I had nothing at the coil. So I wasn't getting back to the distributor. The ignition module was not the issue. Instead of replacing the PIP sensor in the distributor I replaced the whole unit. Actually I replaced it twice. The first remanufacted unit had a issue. After installing the second unit the car fired right up. I set the timing and drove it into work, It's running great.
KDOGGG67 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 Off
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