Ran a 470rwhp cobra, had a nose on him and then it started to run like ass. Was misfiring and wideband showed 15:1 (cruising not on spray) its normally 13.6:1. So I limped it home and started getting after it.
At first I thought it was a blown headgasket, because I'm getting bubbles in the coolant with the cap off, car has done that since day one but it's worse no.
It never popped or detonated, and there isn't any blow by.
Luckily the heads will be on in a week or so.
What causes this? Any input? Going to change the plugs tomorrow and see what it does. This was on the 125.
For your time:
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