What other sensors are on the same circuit as the ecu fuse circuit thats under the hood in the fuse box.

Well we were tuning car on the dyno and shut the car off to cool. Went to start it up again and didn't start. The ECU fuse under the hood was popped. We changed it and popped 2 more.

Checked out all the gounds on manifold, valve cover, tranny, were all good. The only change was we added a resister box for the 880cc injectors yesterday but since yesterday it was running as well as today it was running.

Thanks

 

BTW its a EG chassis with a K-Swap on K-Pro w/ a hasport harness.

we just unhooked the plug that plugs into the where the old relay would plug into and it didn't pop it when we turned the key on.

So then we plugged it back in and un-plugged the harness of the ecu and still it didn't pop it. So we plugged the ecu back in and POP!

 

ttt

 

ttt

 

im not familiar with Kseries engines so im just gonna try and apply my bseries knowledge to TRY and help, sorry if im waaayyy off

Does the K series ground the main relay on the tstat housing like a bseries? I would check your main relay and make sure its kosher, then verify that it is grounded correctly.

I know crazy **** can happen when that main relay aint grounded right...

also check your alternator fuse and ground!

 

roger that thanks.......BTW FYI on the swap there is no more main relay, there are now 3 smaller ones on the hasport harness.

Thanks BTW, Steve

 

The clock is also on pgm-fi ECU fuse no. 32

 

i dunno about k-series either but an o2 sensor can cause that fuse to pop (on the older motors)