This is a crank, pause, crank, pause issue that is happening on a late 60’s A-Body Mopar resto-mod with a 2010 6.1L Hemi swap.
Link to video:
Anybody know what could be causing this? The ignition key is being held fully in start position until motor starts. And also does it during WOT-n-release for oil pressure prime. Motor has the 5.7L truck starter for mate up to 545RFE auto trans. We are suspicious of faulty starter or possibly a bad ground, but have found no evidence of either.
The motor and stage 2 flash PCM were brand new at install back in 2012-ish. But the vehicle only has about 400 miles on it since the build. It did a bit of sitting in a clean, dry garage over the years, and started this cranking issue in the last couple of months after installing a brand new battery (which we’ve verified is not faulty).
Below are the OBD-2 codes it is throwing up, many of which we presume are not related to this cranking issue and have existed since the build. Any input you have on those codes would likely help too, but we are taking things one step at a time by starting with this cranking issue first.
Thanks!
P0499 Evaporative Emission System Vent Valve Control Circuit High
P0480 Cooling Fan 1 Control Circuit Malfunction
P0443 Evaporative Emission Control System Purge Control Valve Circuit
P0073 Ambient Air Temperature Sensor Circuit High Input
P0463 Fuel Level Sensor Circuit High Input
P0038 HO2S Heater Control Circuit High (Bank 1 Sensor 2)
P0058 HO2S Heater Control Circuit High (Bank 2 Sensor 2)
P0700 Transmission Control System Malfunction
P0734 Gear 4 Incorrect ratio