Hey guys...well, my shelby has been givening me a hicup with knock.
I have a flashable smec in the car with the CEL knock light activated.
I have some +20's i bought off a memeber here along with a adjustable fuel pressure regulator..set at 55psi
Most days i drive the car it drives like a beast...i've been boosting to about 17-18 psi, but on curtin days i have getting knock going threw my gears with regular city driving...no boost...i really don't think its false knock as my wideband is jumping all over the place...sometimes shooting to 17afr..
My qeustion is, what causes knock...my geuss is a fuel injector is not doing its job....could a faulty regulator cause this also? if so, how?
Last time this happened i parked the thing for a week....loaded a new cal into my smec..and the car was fine for a week....now back to the knock problem..i am sctratching my head on this one cause i am driving the car like a grandpa and i am still getting some solid knock in lower rpms...what gives...before i take the injectors out and send them out to be tested and cleaned i was going to see if any of the gurus here have any tips..