점화 플러그 교환 수리 사례
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2026. 6. 30. 작업
난이도 & 준비물
증상
A most intriguing cold-start misfire mystery
처리 내용
Root Cause: probably a couple of things Sadly, I feel that there isn't enough data here to uncover the smoking gun, but I have realized some things upon reflection that can indicate what is probably wrong with the vehicle: Question 1 If the front lambda sensor voltage is indicating rich, why is the fuel trim positive (indicating that the injector pulse-width is increased because the AFR is deemed too lean by the sensor)? A couple of possibilities spring to mind: Fuel management has stopped trusting the front lambdas and stays in open-loop mode However, this alone will not explain why the engine misfires only when cold, since the engine should be running in cold-start enrichment mode to avoid that scenario. The one thing the freeze frame is sorely lacking is fuel flow, which would confirm whether or not cold-start enrichment is taking place. The fuel management is defaulting to a failsafe map If this was the case though, why would it misfire under light throttle? I highly doubt that Mer
출처
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토요타 캠리
THERE HAS BEEN SEVERAL MISFIRES WHEN STARTING THE CAR, AND THE CAR SOMETIMES GOES INTO LIKE AN IDLE MODE. THE DASHBOARD STATES 27 MPG, BUT I'VE BEEN TRACKING MILEAGE ON A PAPER LOG, AND THE VEHICLE IS REALLY ONLY RECEIVING APPROXIMATELY 19 MPG. I LOOKED TO IT TO SEE WHAT IT COULD BE, AND AFTER LOOKING UP ACTIVE RECALLS, REALIZED THAT IT WAS SYMPTOMS OF THE FUEL PUMP MALFUNCTIONING. I TOOK IT TO SCOTT CLARK TOYOTA; A MANUFACTURER'S DEALER, AND THEY REFUSE TO REMEDY THE SITUATION.
차량 정보 없음
I have a 2009 Pontiac Vibe, It seems to run fine on the highway but is struggling with stop and go traffic. When at stop lights, or trying to accelerate from a stop the engine jolts and cuts off. The engine has also shut off while idling, when engine was hot. Check engine light comes on P0351-P0354, ignition coils A-D, “Primary Control circuit/open”. I took it two 2 shops without them finding a problem, they checked the coils and wiring. I replaced the battery, spark plugs and throttle body (throttle was getting stuck earlier in the year preventing car from starting properly, improved after cl
토요타 캠리
OFTEN DURING ACCELERATION, MY CAR SEEMS TO SPUTTER OR MISFIRE. WHEN TAKING OFF THERE SEEMS TO BE, AS THE ONLY WAY I CAN DESCRIBE IT, AN AIR BUBBLE IN THE FUEL LINE. KINDA LIKE FUEL ISN'T CONSTANTLY BEING FED TO THE ENGINE. THERE ARE GAPS. WHILE DRIVING AT A CONSTANT SPEED, THIS DOES NOT HAPPEN. ALSO, SOMETIMES WHEN ACCELERATING FROM A STOPPED POSITION, MY CAR ACCELERATES SLOWLY AND THEN ALL OF A SUDDEN, TAKES OFF AS IF ITS PLAYING CATCH UP. ALTHOUGH THERE ISN'T AN ACTIVE RECALL ON MY CAR, I THINK THERE IS A PROBLEM WITH THE FUEL PUMP.
토요타 캠리
I keep getting error code P0304 which says its cylinder 4 misfire the engine starts shaking a bit and most of the warning lights in my dashboard turn on and it disables the parking brake , I took it to a shop and they took out the fuel injectors to visualy inspect them and moved injector 4 to a different cylinder but the same error keeps coming back cylinder 4 misfire , I keep having to spend money and still have the same issue. It only does it on a cold start .