Electrical Starter Heat Shield

Discussion in 'Fox 5.0 Mustang Tech' started by GoldenEagle91, Feb 21, 2014.

  1. Good evening gents,

    I have any issue with my starter where when I have been running the engine for a bit and then turn it off I am unable to start it up right away. I believe this is because the heat off the exhaust manifolds is getting to the starter solenoid because if it has about 10 to 15 minutes to cool off it starts right up. I was wondering if anyone knows if there was a OEM heat shield over the starter and where I might be able to find one. I have come across a universal type sleeve on Jegs but I wanted to see if there might be an actual piece of metal I could pick up. If anyone has an idea please drop me a line on here.

  2. Honestly, if you are running raw non-ceramic coated long tube headers & high compression; you might have starter heat soak issues. If not, you likely have a weak starter, a bad ground, ignition module heat soak, and or bad fuseable link IMHO...
    GoldenEagle91 likes this.
  3. Well, I'm beginning to lean towards bad wiring or a weak starter. The starter solenoid is mounted on the passenger fender with a rats nest of crap running to it. I will be cleaning up this whole deal when I put my new engine into it. I have found other problems with the wiring of other parts on my car so it leads me to believe that somebody who didn't know what they were doing was jerry rigging some things and this is the product of it.
  4. Does it just not crank or cranks and won't start?
  5. It will crank but won't start if it's a hot start. I've had it happen when I've been getting gas before. I don't shut it off when I'm gassing up anymore. Usually need at least 10 minutes after I shut it off to start it back up.
  6. Very confused. You said it cranks.. If it cranks, it has nothing to do with heat soaking the starter?
  7. If its cranking then rule the starter and solenoid and associated wiring out. You may have a bad module Or something of that nature.
  8. Okay, so you believe that the ignition control module could be my issue? Would a bad coil or some other part of my ignition cause this?
  9. Certainly could. @jrichker do you have a checklist for cranks but won't start?
  10. To double check, are you saying that it could be a bad coil?
  11. Rather than just throwing parts at it, search for jrichkers checklist or hang tight till he responds to this thread.
    GoldenEagle91 likes this.
  12. Will do. Thanks bud
  13. This is usually as simple as bad/corroded starter cables, especially the long-ass one that runs from the solenoid to the starter. Do a voltage-drop test and be prepared to be amazed at what's lost in translation.
  14. I am aware of the cable you are referring to but I am not sure what a voltage drop test is. Could you please elaborate?
  15. Here's some good resources. It can be a bit of a PITA to do it on a hot car, but it's really valuable diagnostic tool, and all you need is a basic digital voltmeter, and maybe a helper to trigger the circuit while you hold the leads and read the meter. Measure from battery terminal to cable terminal to see how sound the connection is. Then from cable terminal to cable terminal to see how sound the cable is. From cable terminal to solenoid terminal, and so on and so on. You're looking for voltage loss at every connection and between each end of every cable in question.

    Voltage Drop Testing

    How To Perform A Voltage Drop Test - Help With Automotive Circuit Diagnosis

    Voltage Drop Testing - An Effective Method For Solving Automotive Electrical Faults
  16. Awesome, thank you for the information. I will have to give this a try when I am home over spring break.
  17. When it cranks over but doesn't start is the starter struggling or is it full strength?
  18. The starter is initially full strength but as it fights to start it gets weaker.
  19. Are you getting fuel? a weak fuel pump will also cause a intermittent non start, specially when low on fuel.
  20. Thats a good question. It's carbureted and its a 79 so the mechanical fuel pump could be worn i suppose.