Hello,
I’m dealing with a problem I’m not sure how to address. I’m hoping to receive pointers or guide on my quest to solve my issue.
Issue: On cold start, my swapped 180sx with an rb25det will crank and idle normally, but as soon as it starts warming up. There’s a subtle backfire, little pops if you will. At operating temperature, the idle begins to fluctuate up and down. Eventually, it will drip my 150A breaker at the battery and the g4+ ecu will lose power and shut off. Or it will shut off without dripping the 150A breaker and everything else stays on: radio, fuel pump, gauges, etc.
Questions:
1. What may cause the ECU to turn off?
2. How to I measure voltage to the ECU?
3. Is it possible there is a short causing the current surge to drip the breaker and make the ecu behave erratic?
4. Anything I should check?
Parts installed before problem began:
• GTR R35 Coilpacks
• Bosh donut knock sensors
• PRP trigger kit
• 270A alternator
• LINK G4+ lambda wideband