How can I fix this issue
So I have a 96 Dodge b2500 van and I took it fo a smog
and it failed. So I put guaranteed to pass emission test in
the tank and changed plugs, wires, cap and rotor and
then it started! Starts up and sounds fine. Idle is great. But
it I go 40 or up hill it losses power and tranny keeps going
in funny gears like shifting in low gears going up hill and
high gears on the freeway while shaking like a kid in a
snow storm. Changed IAC. Nothing. Engine light on.
Misfiring, cat rattling, it sounds stupid! Going 40 on
Highway when going up hill is embarrassing while people
are honking at you. Please help. Cat might be clogged.
Please help!!