Some questions about a header install. Input needed.
Some questions about a header install. Input needed. Couple things. Its an ls6.
1. Check engine light came on. Funny thing is, in didnt come on till the 2nd time I drove it. I turned it on prolly 20 times with no check engine light? Hope nothings messed up
2. I couldnt fit my torque wrench to torque the spark plugs (which I left out of the box gapped tr-55's) or the header bolts to spec. So I tightened till I felt it was solid. Whats the torque spec on the bolts from the motor to gasket to the header?
3. Im hearing a wierd whirring/engine noise coming from the engine when the throttle is blipped. Does this mean I prolly have a leak where the header meets the motor? I used the stock gaskets, not kooks supplied.
4. The guy who welded the fabbed connection pipes took all 4 o2 sensors out, saying without cats they are useless, and dont do anything. Is this correct?
Thanks alot.
1. Check engine light came on. Funny thing is, in didnt come on till the 2nd time I drove it. I turned it on prolly 20 times with no check engine light? Hope nothings messed up
2. I couldnt fit my torque wrench to torque the spark plugs (which I left out of the box gapped tr-55's) or the header bolts to spec. So I tightened till I felt it was solid. Whats the torque spec on the bolts from the motor to gasket to the header?
3. Im hearing a wierd whirring/engine noise coming from the engine when the throttle is blipped. Does this mean I prolly have a leak where the header meets the motor? I used the stock gaskets, not kooks supplied.
4. The guy who welded the fabbed connection pipes took all 4 o2 sensors out, saying without cats they are useless, and dont do anything. Is this correct?
Thanks alot.
You must have the O2 sensors installed and hooked up or you will get a CEL. The front O2's are vital to the fueling operation in the PCM during closed loop operation. You can delete the rear one's in the PCM, but you still have to hook them up or use O2 simulators.
Unless your running an open loop tune, reinstall your O2's and you'll be okay.
Unless your running an open loop tune, reinstall your O2's and you'll be okay.
