Hard Starting Hot Big Block

[67Dart273]

So the tester I have is the old school resistant type tester (where you hold a switch on the bottom for 10 seconds and watch the gauge to see where it falls). I also used a larger group size battery for testing from my 04 Ram SRT10 and saw no difference. I don't have an ammeter, I have a volt gauge (all new wiring on this whole car. With a volt meter I get 12.8 at the battery and 12.7 up at the front. 1 wire power master 130 amp alternator and I'm seeing 13.3ish on the volt meter when driving (dial style autometer gauge plus driving so not like I'm able to check down the tenth of an amp in that situation).

That will not work here. You need a variable load tester so that you can match the voltage which the starter pulls down to in order to read the starter current

 

[hemifiedbird]

In all your posts, I haven’t seen what your charging system is doing.? Also what timeline is it that it will not start. You say cold it fires up and cranks fine( 5 mins idle time or hour of driving time?). If the alternator is not charging properly then you may be down on your battery voltage after driving time

 

[charger426]

In all your posts, I haven’t seen what your charging system is doing.? Also what timeline is it that it will not start. You say cold it fires up and cranks fine( 5 mins idle time or hour of driving time?). If the alternator is not charging properly then you may be down on your battery voltage after driving time

Tests have been letting the car idle with the hood shut for 20-30 min (been raining) which get the coolant up to 190. Voltage while running 13.2-13.6. Voltage when attempting the hot start is 12.8-13.1.

 

[hemifiedbird]

Tests have been letting the car idle with the hood shut for 20-30 min (been raining) which get the coolant up to 190. Voltage while running 13.2-13.6. Voltage when attempting the hot start is 12.8-13.1.

Running Voltage should be around 14.5. 2 1/2 volts over battery voltage. Possibly check your alternator, regulator