Ok I just installed CC306, 1.6 RRs, pushrods, valve springs, and PCMforless.com PCM in my car... also new opti... Car ran fine for a couple days.. and now its blown the eng sensor fuse twice tonight, and is running like crap (dies at idle, if it will even go back to idle, sometimes it sits at like 2000-2500 rpm and very hard to start. It will fire, but it wont stay running..) Anyone know what would cause the engine sensor fuse to blow, or what is causing my problems? Im positive its from the fuse, but I need to know what to check, I did a search, but had no luck. Thanks for any help guys.

 

A short in any of the O2 wiring, MAF, reverse lock out or skip shift solenoids. They are all controlled by the eng sensor fuse.

 

Thanks

went out and checked it and the drivers side o2 extender had somehow shifted onto the collector and burnt through the covering and the copper part wire was touching the header. I think Ive got it solved, but I wont know for sure til tomorrow when I put the o2 back in place. Thanks man