Q: Check Engine light on with a misfire in cylinder 1
The Check Engine light is on with a misfire in cylinder 1. The spark plug and coil pack has already been replaced.
Recommended Services
| Engine is misfiring Inspection | $94.99 - $114.99 | Get a Quote |
Hello. Although you have just replaced the spark plug and coil pack, there could be several things going on here. It is possible that the wiring to the coil pack is broken, there could be a broken wire somewhere, or something could be wrong with the spark plug and coil pack itself. Another possibility is that the fuel injector may not be working. If cylinder 1 is bad, you may need to replace the entire engine. I recommend having a professional mechanic inspect your engine misfiring issue to determine what repairs are needed for your vehicle.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
Check Engine Light P0430
Hi there. There may be two possibilities here for the P0430 code (https://www.yourmechanic.com/article/p0430-obd-ii-trouble-code-catalyst-system-efficiency-below-threshold-bank-2-by-spencer-clayton). The fact that the new bolts were installed can cause the computer to read differently so it may just need to adapt and reset. It is also...
Loud noise coming from front part of my car starting at 30 kph
From what you are saying it sounds like you may have a failure in the power steering pump (https://www.yourmechanic.com/services/power-steering-pump-replacement) or possibly the belt. If the noise only occurs when the vehicle is moving then it is more than likely a...
The door striker plate fell inside the car, how do I get it out?
You can try fishing out the bracket with an extendable magnet. There was a threaded washer that attached the door striker plate to the shell of the cab. If the magnet is not working, then try a telescoping tool and...
Engine takes to long to warm up I've replaced thermostat already and it misses horrible till it warms up its a 4.9 engine
This engine uses a cooling fan clutch that controls the fan speeds on demand when the engine radiator starts to get hot if increases air flow to cool the engine down and slows the fan when it needs to increase...
DBC light is lit up on the dash (red).
Hi there. The Downhill Brake Control (DBC) light is on for either the system is active by having pushed the on button or the controller under the dash is malfunctioning. First look for the button that turns on the downhill...
My car is shaking and I just changed my spark plugs
Shaking or vibration (https://www.yourmechanic.com/services/engine-is-shaking-pulsating-or-vibrating-inspection) may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) may cause the engine idle to drop below...
WHY WON’T MY CAR START !!??!
This may be a sign of a faulty ignition coil. Ignition coils (https://www.yourmechanic.com/services/ignition-coil-replacement) are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly. The insulation develops small fractures that open when heated and...
gas gauge works but always reads as if it where full even if no gas is in the car
The fuel sender inside the tank is most likely open circuit or short circuit and needs to be replaced inside the tank on the pump.
Knocking noise around intake and coolant leaking
If you have a severe coolant leak from the water pump, I would recommend replacing the water pump in order to resolve the leak prior to doing any other repairs. I say this because it is possible that the water...
Related articles
The Best Used Cars to Buy If You’re Over Six Feet Tall
While While shorter than average drivers can have a tough time finding the right car, it’s equally hard for taller drivers, perhaps more so. If you’re feeling squished, or have to hunch over the wheel to drive, then you’re not...
P0298 OBD-II Trouble Code: Engine Oil Over Temperature Condition
P0298 means that the engine is or has recently overheated due to low coolant level, faulty cooling fan, thermostat, or radiator.
P0788 OBD-II Trouble Code: Shift/Timing Solenoid High
P0788 means that the ECM has detected a high voltage from the timing solenoid valve (TCM) terminal due to low or dirty fluid, or shorted solenoid.
Browse other content
Estimates
Services