4.3 Mercruiser ignition control module Thunderbolt IV

[glenbennett04]

Good morning,
I rebuilt lower end of my 1992 4.3. Thunderbolt IV.. I put back together the harness. Now when I have the Control Module attached to the triangle plate. It gives me a slow crank, When I unplug it, it give me a faster crank.
Please HELP!
Glen

 

[Lou C]

Are u sure that the firing order is correct?

 

[glenbennett04]

Are u sure that the firing order is correct

 

[glenbennett04]

Lou, I am pretty sure they are. I will double check this evening when I get home. When I took the harness apart the purple wire fell out. So I just pushed it back in and ses to be all connected to the pins. PS I can't find in the manual what the colors mean on the ignition module. Can you please shine some light what the four wires are?

 

[Scott Danforth]

Look at the troubleshooting guide in the stickies

Sounds like plug wires or timing are off

 

[Lou C]

My thought as well

 

[glenbennett04]

Look at the troubleshooting guide in the stickies

Sounds like plug wires or timing are off

Scott,
That would make for a slow crank?

 

[Scott06]

Scott,
That would make for a slow crank?

It could

 

[Lou C]

If firing order is off the engine could be fighting itself

 

[Scott Danforth]

if timing is too far advanced, it would be fighting the motor as well.

 

[glenbennett04]

It could

Well then I'm going to get it timed professionally. Thank you

 

[nola mike]

Well then I'm going to get it timed professionally. Thank you

It's easy enough to time it as an amateur