Hey guys im fairly new to this forum. I recently bought a 1994 camaro z28 automatic with 146k miles for $700 because the owner and myself figured the gaskets where blown. Although it was a hissing noise kinda liike a supercharger i bought it. Took it to Midas and they fixed the Intake manifold leak. I definitely know it needs a major tune up, and might need a neW catalitic converter. except When i turned it on and rev it , it only revs up to the 4k rpms but then it wont pass the 3k rpms now(sounds like it hits the 5k rpm redline tho), and the redline doesnt start til 5 or so. So im wondering if its the cat that is clogged up or the transmission?. When i do drive it, it shifts fine but after revving it while being parked it shifts a wee hard now. I have no idea what it is. Tune up, cat and transmission? . Forgot to mention the exhaust sounds really silent? the guy put a flowmaster muffler only but it still should sound kind of loud right? Thanks for your time!

 

Sounds like the cat is plugged up. An exhaust shop can check the pressure in the system by connecting a gauge in place of the O2 sensor.

Beyond that, check the fuel pressure and scan it for codes.

 

Hey cobrakiller, Im new here myself but thought Id let you know there are some really knowledgable folks here about LT1s. Hope you get your problem fixed soon. good deal for a restro car really.

 

Ok thank you for your response, midas did say that it needed to be replace.and u said check fuel pressure, il put that on my checklist.il let you know.@norse thank you for welcoming me.lol. yeah this is my 2nd camaro that I get for 700... I purchased one a year ago for the same price but with blown gaskets that ended up being sold.. anyways il definitely get started ok my bby.thanks!

 

Injuneer's point on the cat is absolutely the best way to check this issue. Other symptoms include slow revving and a fuel smell but you don't always get the bad smell.

 

Hey everyone!! id like to thank you guys becuase i replaced the bad cat and now im flying!!!!! really good acceleration, the exhaust is extremely loud since the cats brand is magnaflow and the muffler is flowmaster. Thanks for your help!!!! Now tune up on the way so it can pass smog.lol

 

Every once in a while, we get one right......