Car runs great at the beginning but once it starts to warm up the performance goes away. To where I'm getting knock retard, what can be the cause, what should I look for first.

No disintegrations

Well-Known Member
I'd ad an alky kit if everything else checks out good. OOPs I noticed you have alky already. Is this a new problem or has always been this way?
Last edited:
How old is spark knock sensor? I've read they can become over sensitive with age.
I had that happen on a non turbo car. Ran good when cold but stuttered at part throttle and just didn't have normal power.
Changed spark knock sensor and all problems went away.