Starter Booster, I hate to revisit this topic, but... Options

[black914]

I have found this topic through a search but my question remains unanswered! I went down to the Queen City yesterday to do a repair on my son's 924S. The trip is essentially 85 miles of 65 miles per hour non-stop driving. When I arrived and rested for about thrity minutes, we decided to go get something to eat first, got in the 914, turned the ignition switch and no turnover. The fuel pump was operating but the starter was not getting the signal. I let it cool for a while, attempted to crank it again and it fired right away. We ran a few errands and made about three stops requiring the engine to be turned off and restarted and I encountered no problems. Went home later in the day around 6:30PM, traveled the miles at 65 steady for about one hour, stopped to get a cola, got back in, attempted to crank it, but again, nothing. Fortunately a good samaritan help me push it off and I got it cranked okay. I got home safely.

I notice that Bosch has encountered this problem before and they have offered a starter booster kit that cures the hot starter problem by boosting the voltage to the starter. My 914 has a remanufactured starter (don't know the age because it was installed by the previous owner).

Would this cure my problem? Apparently it has been a problem in the past or Bosch would not have offered a cure.

Comments?

[SLITS]

Heat increases resistance in the wires and commensurately drops the voltage to the solenoid

The Bosch "Hot Start System" is merely a relay that has a lower "pull in" requirement for the relay which closes the circuit to give higher voltage to the solenoid.

The high resistance you experience could be in the switch, the wires running to the relay board, the wires running from the relay board or the solenoid itself.

Please your wife...put a momentary push button across the bat terminal and spade terminal on the solenoid...when it fails to turn, open the engine lid (make sure key is on) and push the button to start (make sure car is otta gear and parking brake is on).