I was racing about a month ago at a colorado nasa event at PPIR.. Everything was going well until the 2nd race 2nd to last lap when I came into the carousel turn in the middle of the track. Hit the braking point and when it came to the apex I went to step on the gas and there was nothing.. I instantly pushed the clutch in and tried to start it. There was nothing, no starter even. Got towed into the pits and after digging around for a few minutes realized the main system 20amp fuse was blown. Put a new fuse in it started right up.. Let it idle for 2 mintures everything seemed fine. I was going to grid for the 3rd race when my car died again. Now everytime i put a new fuse in, it blows as i turn the key to the on position. The car is currrently running the autronic sm4 fuel management amoung evey other bolt on possible.. 600hp on ethanol. but was running 21lbs of boost at like 430whp.. any suggetions as to where to begin? I used to have a ebcs but recently went to a haulman pro manual boost controller. the ebcs is still wired in. I'm thinking maybe a loose connection somewhere close to the ecu? Please help.. This is very frustrating fix.. also if you could email any suggestions to rausch750@gmail.com. i'll be in the garage all day and i get email to the phone.. thanks

 

Divide and conquer. Take a look at the FSM, pull all the fuses, and start adding them back. When one blows, you can start looking at what it's connected to.

 

it's the main system fuse.. #8 fuse?

 

jmcevo1, check out this thread. https://www.evolutionm.net/forums/sh...d.php?t=361427
Both vicksen and mt057 have the same problem with fuse #8 blowing. Vicksen had found the 02 sensor shorting over bumps, and not sure if mt057 has found his problem yet.