MSefi.com read only forum (Jan.15,2018)

I'm having trouble getting my TPI injected 283 Chevy V8 to fire up. I don't see the engine RPM move (in MT) during cranking. The 'not cranking' box in the lower left screen slowly toggles between 'cranking'. I've read the manual but have not found the right info yet.

I'm using MS-II and a 7 pin HEI ignition module.

Any suggestions?

Cheers

I was having the same problem, after much searching I found it to be a wiring issue. The coil was losing power while cranking. Also you might check to see what your cranking speed is set at in MegaTune, if it is set to high you won't get megatune to recognize it to be cranking. Double check that you are getting spark as well.

Matt.

You wanted to know how I knew that the coil was losing power while cranking. I just hooked my test lite to the 12v in and disconnected the starter so when I turned the key the light would go out. I just had to rewire the 12v wire to a hot while cranking circut.

<Matt

are you using the optical input or the vr input zane

I'm using the hall/optical input circuit per the build instruction 50a in the assembly guide.

weird i'm guessing you have already checked the settings in megatune maybe your cable to the megasquirt has a bad connection ran into that on a friends car with the tps wiring bad joint on the db37 plug maybe you could see if the hei will fire a coil itself to be sure it works too. Zane