Had this problem before changing motor. Opted to change motor due to other problems with rings & cylinder damage. Changed motor and all sensors on the motor and intake manifold. Did not change MAF, IAT, O2... Fuel pressure on fuel rail stays in specs at idle or throttled. Wondering if I just happened to get a hold of another bad TPS sensor to go with the one I might already have. Any ideas?
Motor will not rev... just boggs down on 2000 Kia Sephia
by Visitor in Owingsville, KY on March 14, 2011
ANSWER by oldman1777 , March 10, 2012
most ap to be a coil braking down
ANSWER by mastertech6371 , March 15, 2011
sounds like a clogged cat converter. get the fuel pressure checked for proper pressure. Roy