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


Also have dtc code p0133

Vauxall astra po304 put a coil pack on still miss firing on no 4 cylinder

po304

ponijac po304

NothIng

IT RAN 10 TO 20 SECONDS, NO MISFIRE, THEN TURNS OFF INJECTOR PULSE TO #4. ALSO TURNS ON TRACTION CONTROL LIGHT. GOOD COMPRESSION @ 140 LBS. WILL SMOKE AT IDLE WHILE MISFIRING. CHAGED ECM, RAN GREAT FOR 4 MIN. THEN SAME ISSUE.

Toyota Corolla
I have toyota corolla 2010 with po304 code, tried to check and inter change all ignition coil but still it's the same code showing up. My vsc light blinks . I don't know what the problem is and I don't feel and see other any symptoms, need help


car ok on idle but misfires when put in drive. scanned and it showed a p0304 code.



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Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0106 Chevrolet Trailblazer
rough idle,and vibrate


P0660 Volkswagen Passat
Our problem is in on engine , which show us P0660 while we entry that computer diagnoustic ,


P0717 P0605

P0792 2 other codes- po731, po734

P0792 nothing



Other Check Engine Light Codes

P0108   Manifold Absolute Pressure/Barometric Pressure Circuit High Input
P0141   O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0151   O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
P0274   Cylinder 5 Injector Circuit High
P0343   Camshaft Position Sensor 'A' Circuit High Input (Bank 1 or Single Sensor)
P0720   Output Speed Sensor Circuit
P0835   Clutch Pedal Switch 'B' Circuit High
P0885   TCM Power Relay Control Circuit/Open
P0903   Clutch Actuator Circuit High
P0980   Shift Solenoid "C" Control Circuit High




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