1995 Ford Mustang Car will not fire after it has run for aw

Tiny
BRAN100285
  • MEMBER
  • 1995 FORD MUSTANG
  • V8
  • 2WD
  • MANUAL
  • 201,000 MILES
Hello my 1995 mustang gt is having some electrical issues that I cannot figure out. The car will start if it has been sitting for awhile but will have a really high idle when it warms up. But after a little while of driving it I will turn the car off and it will not fire back up, it will try to start just never fire up. Car has plenty of battery power but will just not fire like not getting spark. After trying and trying the smell of gas is present so I know its getting fuel. I am getting really weak spark with tester from the igniton coil. Please help.
Do you
have the same problem?
Yes
No
Monday, March 15th, 2010 AT 6:44 PM

3 Replies

Tiny
DAVE H
  • EXPERT
Hello .. thanks for the donation .. much appreciated

Start by checking, cleaning or replacing the CKP (crankshaft position sensor) located behind the crankshaft pullley also test the Ignition Control Module (ICM)On right inner fender panel, forward of strut tower.

ELECTRONIC IGNITION (EI) (HIGH DATA RATE) SYSTEM
The EI (high data rate) system consists of a Crankshaft Position (CKP) sensor, Ignition Control Module (ICM) and one 6-tower coil pack.
The EI system operates by sending crankshaft position information from CKP sensor to ICM. The ICM generates a Profile Ignition Pick-Up (PIP) signal and sends it to the PCM.
The PCM responds with a Spark Output (SPOUT) signal containing advance or retard timing information back to the ICM. The ICM processes the CKP and SPOUT signals and decides which coils to fire. Also, the ICM generates an Ignition Diagnostic Monitor (IDM) signal to PCM, which is used to provide a tach output signal and indicate a failure mode if detected.
The CKP sensor is an electromagnetic device that senses movement of a 35 tooth wheel, located behind the crankshaft pulley. Each tooth is positioned in 10 degree increments with an empty slot (missing tooth) located 60 degrees BTDC. The detection of the missing tooth is what enables the PCM to identify crankshaft position and initiate correct firing order.
The ICM is a microprocessor with coil drivers. ICM strategy controls spark timing and coil firing. The ICM turns coils on and off at the correct time and in proper sequence, based on information from CKP sensor and a pulse width modulated signal (SPOUT) generated from PCM. The ICM receives CKP sensor and SPOUT signals and produces PIP and IDM output signals, which are sent to PCM.
The PCM receives ignition ground and PIP signals from the ICM, and then generates a SPOUT output signal based on engine speed, load, temperature and other sensor information. An IDM signal is received from ICM to determine if an ignition failure mode should be recorded.
The coil is turned on (coil charging) by ICM, and then turned off, firing 2 spark plugs at once. One plug is fired on the compression stroke; the other plug fires the mating cylinder, which is on the exhaust stroke. On the next cycle, firing strategy is reversed.

Hope this helps


http://www.2carpros.com/forum/automotive_pictures/266999_AAA2_1065.png

Was this
answer
helpful?
Yes
No
Tuesday, March 16th, 2010 AT 5:02 AM
Tiny
BRAN100285
  • MEMBER
I have replaced the ignition control module and the ignition coil. The car will start with the gas pedal all the way to the floor then instantly die. The car will start with the inertia switch unplugged then while itrs running I plug it back in then th car instantly shuts off.
Was this
answer
helpful?
Yes
No
+1
Tuesday, March 16th, 2010 AT 2:55 PM
Tiny
DAVE H
  • EXPERT
The fuel pump should not run at all with inertia switch unplugged as this supply's the pumps hot feed ? .. the pump must be getting a power supply from somewhere else ? there must be a short to power in the pump wiring somewhere .. when you connect the hot feed from the inertia switch it overloads the pump ?


http://www.2carpros.com/forum/automotive_pictures/266999_mus_3.jpg

Was this
answer
helpful?
Yes
No
Friday, March 19th, 2010 AT 4:35 PM

Please login or register to post a reply.

Recommended Guides