P0304 OBD Engine Code Logo   Code #P0304 -
Cylinder 4 Misfire Detected

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A Check Engine Code of P0304 means that there was a misfire, specificially for Cylinder #4. You should check your spark plugs and spark plug wires and probably replace them, especially if have a Straight 4 Cylinder engine (very easy) or if Cylinder 4 is easily accessible. You should also check your catalytic converter to ensure its working properly and check your coils as well. You should also make sure that you wires are in the correct order as well.

Chevrolet Silverado 1500
Codes P0304, P0200, P0174


Suzuki Verona
What is the code p0304


Hyundai Accent
reduced power and idles rough


Lincoln Continental
MIS FIRES


Ford Expedition
replaced all spark plugs now has misfire # 4 cylinder


Toyota Tacoma
2001 yeay


car stumbles in drive and check engine light on

runs rough

Fiat Punto
code P0 304 ????


po304

Kia Optima
2004 kia optima po304 just started misfiring changed plug had core pack checked so it is geting fire but dont know if it is something else or what


Kia Sedona
idles rough


Po304 tried new wire new plugs new coil for spark plugs. Throttle position sensor. Still acting up why?

check engine light on, engine looses power on accerlation

Chevrolet Tahoe
Truck with vibrate and shake on eceleration getting on the freeway and up hills.


Suzuki SX4
Misfire in mid rpm range, half power at best, not safe to drive until repaired.


Ford Ranger
Definite miss, replaced wires, coil pack plugs and injector, with no improvement. Compression is low 90 psi in #4 cylinder.


Mush lighte on so far

Nissan Altima
Light on Sunday off Monday check it Sunday at auto store


Nissan Altima
Did get a tune up 2 year ago


check engine light came on suddenly. started missing really bad. this was on a weekend. after a day of driving light went off and it was only missing once in a while? check code showed po304?

Jeep Grand Cherokee
2011: driving about 30 mph. no noticeable symptoms. car still starts


Chrysler Town and Country
misfire


P0304

Nafa

Nafa

P0304

BMW 330i
P0304


Toyota Tercel
CILINDER 4 MISFAIRE


engine light on

2001 toyota corolla Code PO304. Intermittent misfire of cylinder 4. Changed spark plugs, coil, fuel injector, and performed a compression test. All cylinders 210.

Toyota Corolla
Light came on about 2 weeks ago. Car has no problem starting. Has a rough idle but seems to smooth out when driving.


p0304 p0328 p0331 bmw 325 ci 2005

replaced plugs,wires cap, rotor,upgraded spider injection to multiport injection ,replaced #4 plug twice always has black spot on center insulator check spark to #4 cylinder with test light when running it's getting spark keep getting po304 code after code is cleared out. engine malfuction light comes on when I leave it idle to long

GMC 1500
after I put a new plug in #4 cyl it idles smooth until misfire code comes on, than it has a slight rough idle




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Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0032 Had fault code p0031 at first. So replace the o2 sensor on bank 1 sensor 1 after replacing the sensor fault code p0032 came on

P0481 a/c fan and cooling fan turn slow

P0342 Kia Sorento
p0342 code let sit overnight now it starts


P0238 replaced turbo sensor, still stores same code

P0520 oil pressure reading low on gauge



Other Check Engine Light Codes

P0231   Fuel Pump Secondary Circuit Low
P0250   Turbo/Super Charger Wastegate Solenoid 'B' High
P0283   Cylinder 8 Injector Circuit High
P0357   Ignition Coil 'G' Primary/Secondary Circuit
P0506   Idle Control System RPM Lower Than Expected
P0531   A/C Refrigerant Pressure Sensor Circuit Range/Performance
P0709   Transmission Range Sensor Circuit intermittent
P0748   Pressure Control Solenoid 'A' Electrical
P0793   Intermediate Shaft Speed Sensor Circuit No Signal
P0973   Shift Solenoid "A" Control Circuit Low




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