ThunderMax Hard Starting Issues Corrections - Manual (Page 2)

Starter worn or damaged
One particular case of bad starts was finally resolved when the STARTER BEARING totally failed.
We learned as the bearing was slowly failing, the added load on the starter was robbing voltage from
the battery, reducing the cranking speed of the start cycle.
Bad kickback and nasty starts were the result. A new starter totally fixed this condition.
If your engine has been modified with high compression and you are experiencing a starter kick back
you should inspect the starter ring gear. Damaged ring gears should be replaced.
If not equipped you may need to add compression releases to the engine or develop added dwell
time to the Automatic Compression Releases( ACR) through the basic settings of your ThunderMax
Fuel-pump leaking pressure.
Many fuel-pump problems are occurring on all models
(Clogged Fuel filters plug, fuel lines are leaking, many will completely fail.)
Fuel pressure should be 55-62 psi while running. If your system cannot sustain at least 50-52 lbs you
should remove the pump immediately to investigate.
After the main power switch is turned OFF the pressure should hold above 50 lbs for 1 minute.
If the fuel pressure drops AFTER the pump stops, this reduction of pressure on the fuel rail will cause
bad starts.
The pressure may be fine while the pump/engine is running but during starting, a loss of pressure
AFTER the pump turns off will cause bad starts.
NOTE: Even though your engine might crank oer and seem like "it should start
”, if the output
of the battery is lower than what is necessary for the module to function, it will struggle to
start.