My 200 chevy 1500 silverado 4.3L bogs down/loses power at near full to full throttle. Everything else runs great. I noticed it the other day when I was hauling a small trailer. As I approached a hill I stepped on it and slowed down!? When I back off of the pedal a bit it felt like the decelleration stopped and maybe even had a little acceleration. Now in my shop I put it in park and if I give it full pedal it will only go to 2500-3000 rpm. If i ease into it it will go well above 5000 unitl I hit close to full. Then it chokes back down to 2500-3000. It's not any sort of rev limiter situation. Just curious as to what others might think it could be. I check plugs, wires, air filter, and fuel filter. My next suspoect is the catalytic converter. I've seen cat troubles on many other vehicles and it sort of acts the same.
May 19, 2010 at 1:08 PM