Can not figure this out for the life of me. The motor has no power up hills at all and is very sluggish on the straight aways. We installed a new cat converter, fuel filters, plugs, wires, O2 censors, distributor and rotors, cleaned the injectors and did other types of maintenance and yet we still have this problem. Any suggestions other than pushing it over the hill? Its been doing this for about 2 months now and getting really bad to the point we cant even ride up any hills or it will come to a dead stop.


--alex

alex gm used to make a double walled exhaust pipe. i had the same problem with a monte carlo and found the inner wall collasped on it and restricted the flow. i don't know if gm still used them in 93 but worth checking sure sounds like resticted exhaust

Put your hand by the tailpipe and have someone rev the eng and see if you feel a lot of exh coming out or just a little. Sometimes the exh. will whistle if it's partially plugged. As previously posted, my dad had a merc. with double walled pipes and was really low on power. My uncle disconnected the exh. and you could almost burn the tires off it. New exh system (single walled) and we were back on the road.

There is flow coming out but it feels a little soft in pressure. When you say double walled, where exactly is that part of the pipe that i can disconnect?

alex on my monte the section that collasped was the extension pipe the peice in front of the muffler or cat converter and the first peice after the manifold y pipe. if you disconnect it there you would basicly remove your whole exhaust system to see if the problem is a resriction

Hmm.. What sucks is there is a new exhaust system on it, infact everything up to the original manifold pipe.

Changed exhaust system. Problem is the same if not worse even. Think there could be a timing issue? Somebody told me to time those motors you have to find the EST wire as well and ground it. True?