I have a 1989 Toyota pickup with the 22RE. My header pipe came loose from the exhaust manifold, I noticed the loss in power immediately. I replaced all the exhaust manifold gaskets and the "donuts" between the header pipe and manifold. I still have pretty much no power for climbing hills or even any "get up and go" power on the flats. Is it possible that I might have done some valve damage? I replaced the spark plugs they were pretty lean and light colored. It just seems that this loss of power came when the header pulled apart. Any help would be greatly appreciated.

 

maybe part of the old donut(s) fell down into the header pipe and is blocking part of the exhaust flow.

Mike in AR

 

could have clogged your cat also

 

I pulled out a few big parts of the donuts, all of the metal was there. Will pull off the cat to check though.

 

checked the cat today--its not clogged--still thinking I might have done valve damage. It starts and idles fine, just loss of power on hills. Someone else said fuel filter, it might just be coincidence that the fuel system got clogged about the same time that pipe blew apart.

 

Fuel filter clog or weak fuel pump will do that too,, mine did.

Mike in AR

 

I was having the same problem. Mine ended up being the O2 sensor. I replaced it, and the power was back to normal. I also saw a 45 percent fuel increase.

 

first of all, sorry to hijack your thread!!


you saw all of that just from replacing the O2 sensor? I think I need to mine really bad!!! did it throw a check engine light or did you just replace it? what are your specs on your vehicle