HP Production Low in 3.5k+ RPM
EDIT: Resolved (hopefully)--the dealer today determined nearly complete blockage of the drivers side Cat. Fully covered under the emissions warranty. He had a new stock Cat overnighted (being in uniform at a dealer who caters to military has its perks) and promised my car back to me within 24 hours. I will post again once I have test-driven it.
A couple days ago I started noticing what I thought was an overall lack of power in my 2005 GTO with 63k miles.
Torque and power under 3k RPM seem to be normal but anything over that seems to be "wasting gas" (i.e. the RPMs are sitting 3k-6k but no extra power or acceleration is being produced).
My first thought was the clutch was slipping at the higher RPM/torque load, but the clutch looks brand new (in fact it turns out it was installed with 50k on the car after talks with the previous owner).
If I attempt any type of "non-standard" acceleration I have a flashing engine light by the time I get to third gear. Even in 5th or 6th gear on the highway if you hit the gas you can hear a sort of click-stop under the hood as if something is attempting to open.
Any suggestions for what to look at? Thanks for your help!
Last edited by davidbutzin; 08-31-2010 at 05:42 PM.