5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Starting problem when warm

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Old 10-22-2007, 10:58 AM
  #11  
AdderMk2
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Default RE: Starting problem when warm

ORIGINAL: FivePointOhh

ok thats kool, i was just offering my advice. which was advised to me, by most of you big names on here and ford,almost a year ago when i had the exact same symptoms and it solved my problem straight away.
but your car was cranking fine... just not starting... his starter is dragging... caused by heat soak
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Old 10-22-2007, 10:59 AM
  #12  
Derf00
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Default RE: Starting problem when warm

ORIGINAL: FivePointOhh

i doubt it heat sink in the starter. start cheap, ICM, ignition control module. at 20 bucks ish and takes all of 5 minutes to replaces. those were my exact problems i had when mine were bad. a heat sink starter doesnt even turn over unless you hit it. and sometimes not even then.
Bad ICM would also cause the engine to die while driving. He does not have that symptom.

Heat translates into resistance for electricity. Not all starters will fail to turn over when heatsoaked. Some like in this case will cause a click and/or slow spin.

You're not wrong necessarily, just not as likely to be right vs heatsoaked starter and the given symptoms.
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Old 10-22-2007, 11:06 AM
  #13  
FivePointOhh
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Default RE: Starting problem when warm

ORIGINAL: AdderMk2

ORIGINAL: FivePointOhh

ok thats kool, i was just offering my advice. which was advised to me, by most of you big names on here and ford,almost a year ago when i had the exact same symptoms and it solved my problem straight away.
but your car was cranking fine... just not starting... his starter is dragging... caused by heat soak
only sometimes it cranked fine sometimes slow depends how long i was driving. but yea i see what your saying now,my bad guys. just mixed up my info
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Old 10-22-2007, 11:07 AM
  #14  
w8less
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Default RE: Starting problem when warm

ORIGINAL: AdderMk2

ORIGINAL: Jasperstang308

i know my old car would have trouble starting because of the timing. but it was the only way i could lean the car out. but then again doesnt that go back to heat?
there is a way around that.... its called a "starter saver"

which on our cars is nothing more than a relay that is wired into the spout connector. the only catch is that you need to find a power source that is hot in the "run" position.. and off in the "start" position.

when cranking the car, it automatically puts your timing at ~28°. but itll start easier with the spout pulled out... or with my "modified starter saver" installed instead
i wish i would have known that then. what did you wire it to? or your power source?
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Old 10-22-2007, 11:35 AM
  #15  
89GT351
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Default RE: Starting problem when warm

What's ICM?
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Old 10-22-2007, 11:47 AM
  #16  
bamaroxz
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Default RE: Starting problem when warm

Ignition Control Module. Off the distributor where your wire harness plugs into.
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Old 10-22-2007, 11:54 AM
  #17  
89GT351
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Default RE: Starting problem when warm

oh, OK, I replaced it about a year ago when I did the 351W swap so can't be it, can it?
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Old 10-22-2007, 12:03 PM
  #18  
89GT351
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Default RE: Starting problem when warm

I guess I will just replacethe ICM and see if that will fix. Is ICM in 5.0L the same as in 5.8L?
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Old 10-22-2007, 12:15 PM
  #19  
bamaroxz
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Default RE: Starting problem when warm

Not sure about the 5.0 and 5.8 being the same. I would think a1 yr old ICM would not fail so soon (????). What about the starter like the other guys recommended? A heat shield would be cheap or maybe some header wrap by the starter if you can string it thru the tight areas, not as good as a heat shieldbut if you notice a difference in it starting after it's hot you'll know what it is.
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Old 10-22-2007, 12:20 PM
  #20  
FivePointOhh
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Default RE: Starting problem when warm

yea if you replaced it already....try the starter. they're probly right. try a heat shield, see if that fixes it.
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