MOST misfires are cuased by a LEAN air/fuel mixture and the coils go NUTS! The easiest way to stop it is to have your IDLE AIR CONTROL VALVE cleaned up along with the throttle body! These TWO THINGS fine tune teh amount of air your enigen breathes in stop and go driving! This is where YOU LOSE FUEL MILEAGE! a DIRTY IAC causes converter and o2 sensor issues. AUTO ZONE can check your trouble codes but most idiots cannoot interpret what this really MEANS! They start repalcing GOOD PARTS becausde th AIR/FUEL mxitgure is crucial and affects O2 sensor clogs and causes many domino effectg type failures along the way! USE SYNTHETIC OIL, like MOBIL ONE and h\change it ONCE A YEAR! It keeps thigns CLEAN! PENNZOIL ULTRA is even better as it gives qa 15 year 500k mile OIL LWARRANTY< unheard of in business! CLEAN IS THE GOAL! ALWAYS include YEAR, make, model country of orign, ENGINE SIZE< mileage and trans type with questions! ALL are a bit different! GOOD LUCK!!
It could take 2 weeks to come back on, it has to wait for a misfire again. Be thankful, maybe the computer made a correction so it won't misfire again, if you are lucky
The dealer of the car can checked STORED check engine light codes and then will know exactly what caused it.
The misfire checking of the engine is constant by the computer. If it is missing the code may be set just not turning the light on. Read it and see. We can only read and erase codes. No scan initiating. The computer decides everything else on its own. Dealers can reprogram the software part of the computer modules.
The "check engine light" only comes on when the CAR knows there is a problem. I doubt that you will find a way to trick the on-board computer into producing the check engine light. However, if you remember what you did to get the light on the first place, I suppose you could try to reproduce the events that happened which caused the light (be careful with this, I wouldn't try it myself).
If it's just 1 cylinder misfiring, you can disable the cylinders one at a time to see which one has NO effect on the engine. That one will be the faulty cylinder. You should post what car you have. If it's one that has coil-paks, unplug each coil pack one at a time. If it doesn't, unplug each spark plug wire, one at a time.
OK so I know that I have a misfire in the engine I can feel it it but I cleared the code a couple days ago and now its takeing a while to come back is there a way or technique that I can do so it will do a scan and find the problem and give me a CEL
