Posted: Wed Feb 16, 2011 7:26 pm Post subject: Update to loss of power/shifting Issues
Okay I have an 02 Impala LS, with 217,000 kms on it. I love this car and have since day one when I bought it. I am noticing a loss of power on the acceleration onto the highway. When I am on the hwy doing 120kmh my cars rpms have always been at 2100. The odd time now it will jump up to 2500rpm(on flat ground) and stay there for like a minute....then drop back to normal.
If i am on the highway doing a steady 120kph and go to pass someone and kick it down a little it revs to 3000rpm and barely gains any speed. If I put the pedal all the way down and she hits like 5000rpm it doesnt pick up at all!!!
I commute in my car everyday and I have been noticing it getting worse.
I have a knock sensor code, and Cam sensor code popping up..... Can this affect the performance at the highway speeds? I am really dreading taking this to the dealer.....thinking tourque converter in the back of my head ,
I have a Hypertech PP so I can pull the codes whenever if they would help. Thanks for the long read and any help is appreciated.
Car was getting worse, I took it to a shop to get the Tranny looked at and the guy suggested I get the engine code issues fixed before I jump to conclusions.
I drop the car off at a shop that my buddy likes, I get a call saying " I took it for a drive, and I want to disconnect the O2 sensor at the Cat, to test something but if it breaks its $150 to fix" so I authorize him to do it.
He calls back later and says" You need a new Cat Conv."
I Cry now........ the price is $600.
and this "Might" fix your problem but we have to start here.......I am thinking sure, replace the Cat Conv, soak me for $600 and my car is still F'd.
Low and behold it WAS the issue for power loss, and misbehaving RPM issues. He suggests I do a Tranny flush soon, and I am good to go!
I LOVE MY CAR!!!!!! This is the biggest thing I have had to do on the "Pimpala" it owes me nothing. Happy ending! Oh and he didn't break the O2 sensor lol
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