misfire

[wycoller]

Came home forst day out with car ran like a dream. 2nd day had a massive air leak Torque V8 72mm plenum inlet sleeve came un bonded and blew out, temporarily jammed in so i could get home. rebonded sleeve cleaned off all soot from rear of car and went for a run now have a misfire predominatly below 3k then clears. As i was running car ultra rich for around 15miles to get me home could i have created an issue with the lambda sensors etc.
First i will pull plugs etc and check leads but as it appears to clear at higher revs i feel its probably damaged lambda sensor as if it was plug or leads would be evident all through rev range any guidance welcome
cheers by way car is supercharged. I have checked for air leaks all is okay and at idle pulling a good vacuum on the plenum

[CHGRIFF]

Hi James. Make sure when fiddling with the intake your did not weaken/break loom connections to AFM. Minor point, but worth a look. Sounds like sooted plugs to me, under full load the engine can run on 7 cylinders without you sensing it, only being apparent at low rpm.