Re: 87 5.0 mustang trouble on hot start
One thing often overlooked is battery and cable condition and connections. Any corrosion or loose connections increase the resistance in the line. First, take each connection loose, sand/scrape/wire brush it clean, apply some vaseline or dielectric grease to the connection and tighten. Do this for each connection from the battery, to the soleniod, to the starter and ground. As heat gets to these cables, the resistance also goes up, and original factory cables are just heavy enough to handle the current. Consider upgrading to the next size cable. Also, get your battery load tested at your local auto supply store. They'll do it for free. They should also be able to test your charging system for problems. The connection between your alternator and battery should also be clean and tight. Remember, stock alternators are borderline adequate at best, and when you add bad connections or aftermarket items that drain your system, the alternator might not be able to keep up, especially at idle and espectially if you're running underdrive pulleys that slow the alternator even more. Hope this helps.