Loud Backfire Like a Bomb Explosion and Engine PCV Damage
Recently My jeep developed random engine misfires that would come and go I suspected that possibly the low cost fuel injectors that I installed last year were the culprits, so I planned to replace them all with Bosch 19 pound 4-hole injector upgraded that I already have bought. However, last week the Jeep Exploded very loud on starting, which I ruled to be a backfire, and it could not start after that the engine starts and keeps revving up even without pressing the gas pedal, and out of concern I just turn it off. Today I checked it closely, and found that there a plastic plate behind the intake manifold that seem to have been crushed by the explosion (see circled part), and therefore it is allowing excessive air into the system causing the engine to rev up uncontrollably. Further examination shows that the PCV valve seems to be dead, because the hose from the plate I indicated in the picture to the PCV valve we knocked off. My two questions are (a) What is the name of that crushed plate so I can search it online, (b) Cold the PCV valve have been the only problem that caused the misfire and backfire or I should still replace the fuel injectors also
