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Old 01-28-2014, 08:13 PM   #1
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Found a code 24, any ideas or help!

I was hoping for some help. I had a previous posting that my 89 GT was having a problem starting. It would crank but not turn over. The odd thing was that a handful of times it would turn over, run well and act like nothing was wrong. Other times it would just crank and not start. I am now at a point that it just won't start.

These are the things I have done:
New ignition switch
New starter relay
New 95 amp alternator with heavy duty lead
New battery
New TFI
New coil
MSD distributor ( changed rotor and cleaned cap)
Visually inspected all fusible links by starter relay
Cleaned engine block ground
Visually searched for problem wires

Still nothing.

Tonight I purchased an ODB1 tester and tried it. The code came up 24 (Electronic Distributorless Ignition System (EDIS) fault- failure in coil 1 primary circuit.

Then it showed continuos memory code 11. Looks like no issue there.

Is there anything I can do to try to figure out the code 24 or is it best to hand it over to a mechanic now that I may have it narrowed as opposed to having him check everything. Or is there a specific location I can head towards.

This has been killing me for weeks. I feel the answer is close.
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Old 01-28-2014, 09:07 PM   #2
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Code 24.. ACT sensor out of self test range 0.3 to 3.7 volts


Code 24 is normal to get logged if a KOEO self test is performed with a cold engine or air temp is below 50°F.
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Old 01-28-2014, 10:20 PM   #3
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Sounds like you may need a new distributor. I had a car do very similar stuff. There is no way to test one except to have a friend loan you a known good one. I've had to replace the distributor on 2 of my past cars. Of course I am assuming you only replaced the cap and rotor since you have that in parentheses.
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Old 01-29-2014, 06:31 PM   #4
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I believe since you have checked every part of the ignition and bought just about everything new from process of elimination it is the circuit board not allowing spark.there is no way to test it so if everything else is good it has to be it.dont have one laying around that you know is good do you?
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Old 01-29-2014, 07:34 PM   #5
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I found my original distributor that working perfectly when I pulled it for the MSD. It is 9 degrees here tonight so no work on it now. Tomorrow I am going to pop a noid light on the injectors and see if they are firing. If not I am going to assume the PIP and change the distributor. If that doesn't work, Monday I am taking into the a shop I was recommended to. Hoping this works though, guy gets $102/hr.

Praying this works.
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Old 01-30-2014, 01:53 PM   #6
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Can a PIP go intermittently or is it like a switch....working or toast?
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Old 01-30-2014, 03:48 PM   #7
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Don't forget about the ignition module. It can be tested but if you have it tested ask them to do it several times BC those things can test good once then bad the next. You need consistent readings.
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Old 01-30-2014, 05:49 PM   #8
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http://www.veryuseful.com/mustang/te...InnerWorkings/
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Old 01-30-2014, 07:00 PM   #9
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http://www.ehow.com/how-does_5023948...tml#page=0tjia is another good article but you need to scroll left.it tells how to check pip signal
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Old 01-30-2014, 07:28 PM   #10
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GUYS, DID IT!!!

At least I think we are good! Replaced the MSD distributor with the stock Motorcraft, buttoned it up, turned the key and she STARTED on the 1st shot.

Let her run for 20 to get hot and still looked good. Then turned her on and off 5x's and looks all good. She did start after I swapped the ignition switch but I think we got it fixed this time. All systems look good.

Thanks for all the advise! Couldn't have done it alone.

---------- Post added at 08:28 PM ---------- Previous post was at 08:28 PM ----------

GUYS, DID IT!!!

At least I think we are good! Replaced the MSD distributor with the stock Motorcraft, buttoned it up, turned the key and she STARTED on the 1st shot.

Let her run for 20 to get hot and still looked good. Then turned her on and off 5x's and looks all good. She did start after I swapped the ignition switch but I think we got it fixed this time. All systems look good.

Thanks for all the advise! Couldn't have done it alone.
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