Yeah the SC took it over the edge. It let go under power in first gear at about 7500 rpm. I wasn't a big hard luanching guy but I was no saint either. My guess is it was getting weak after 100,000+ miles and the SC took it over the edge. Kind of suprising though considering how it blew conterary to what some have led to think about when these would typically break, which my understanding is under hard launching conditions or hard shifting. Neither was the case for mine. I got lucky and found a guy that is willing to ship me one with 70,000 N/A miles for $450. I should be up and running again soon. I'm kind of paranoid now though and one with 70k on it already, but its a good price I think I shouldn't pass up.

 

I'm running the Walbro pump that comes with the Comptech kit, I've done my AFR on a dyno and it was fine but like I said if the pump starts getting weak like yours might have then I'd never know. I'll check into widebands now though thats for sure.

 

Hmmm your issues seem pretty similar to what i am experiencing now. Maybe my issue will also be the Walbro 255. I bought it on ebay as a genuine Walbro and says Walbro on it but maybe a fake one or something and not working correctly.

 

you should check your wideband. sometimes. depending on application, can go out. maybe you need another o2 sensor!!! you said you used it for a year. so maybe its on its way out.