Due to its location, the solenoid is exposed to extreme temperatures causing a reduction in current and an increase in resistance through the pull-in coil and consequent weakening of the magnetic field. This usually happens after driving around a hot summer day, shutting the engine off and then try to start the car after 20 or so minutes. Allowing the car to cool off will usually do the trick but that means your stuck being with people you really don t want to be with while you wait. This is not only annoying but embarassing as well. This problem seems to be more apparent on cars with headers, wild cams and hotter ignitions.
Headers tend to surround the starter with heat due to the collector being closer.
The parts for a remote solenoid can be bought at most auto parts stores but Summit Racing or M.A.D. Enterprises have kits available at a much lower price and they include everything you need saving the hassle of hunting for the parts. The solenoid is a Ford style unit with S and I terminals. The wire is 14 gage with the correct terminals. Also included is a terminal for changing your battery cable. Not included but needed is a battery cable to go from the battery to the new solenoid.