I have a 91 TII with a knight sport computer. The car died out while driving it the other night. I was not getting any spark. When I put the stock ecu back in the car started back up. I drove the car home, went to start it the next day and had no spark again. Something is burning up my ecu. Has anyone experience this problem before? Where should I start looking to fix this problem? Also if anyone has a stock ecu, and a PFC-Fcon I'm looking for one now that my knight sport one is toast. Thanx

 

I had this problem when I had my t2 motor swapped in. Kevin landers narrowed it down to bad injector wires. Once he ran new wires to the injectors from the ecu it fixed the problem. This however IMO, was only a temporary solution. I have since replaced the harness with a good one and wrapped it with a self adhesive heat wrap tape from bonzai toyota. Unfortunatly it does fry the ECU, specifically the portion that controls the injectors. Kevin landers (Rotaryresurrection) maybe able to expand on the issue more then I as he was the one that troubleshot it (and burnt through several ECU's trying to find the problem).

 

So the injector wires would cause we to loose spark? Cause I'm still getting fuel, but no spark. I had a injector problem before but it never brunt the ecu. thanx for your help.

 

Check your timing signal wiring from the ECU to the leading & trailing igniters (get out the FSM wiring manual to figure out where all of the plugs & such are). I'd start at the igniters, and work my way back to the ECU, looking for wiring that's chaffing against ground somewhere. Just a guess...