Hi all. My VR-4 has been acting up for a while now. The factory ISC appeared to have died about a year ago. I got a replacement from eBay (risky move, but the price was right). It ran fine for a few months then the engine began to stall out just like it was doing with the original ISC. I complained to the seller and they sent me another one. The new one lasted about 2.5 miles from my house before it gave out. Done with eBay, I got a new unit from Ninja Performance. It worked for about a week before it started doing the same thing. Am I really this unlucky with ISCs? Can a failing ECU mimic the symptoms of a bad ISC? I pulled the ECU out and looked it over, but I didn't see any obvious capacitor issues.

The oddest part is, the car will sometimes run and idle just fine, then out of the blue it will try to stall out, and will stay that way for weeks on end. Then suddenly it'll run fine again... rinse and repeat. Any ideas will be appreciated. Thanks!!!