Hi,
'04 Sante Fe w/150k miles, now won't go over 30 mph.
Someone suggested that the catalytic converter might be clogged, but I can Rev the engine up all the way just fine in neutral while parked..
Got the transmission fluid changed but it did not fix this problem.

First mechanic that has looked at the problem says it's the anti-lock brake pump causing the problem and quoted almost $3k to replace!
I'm taking it to another shop to have it looked at, see what they say..

Does anyone know if this is a common problem and what a cheaper solution might be?

Thank you