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P0304 Diagnostic Trouble Code Discussion for May 2019

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2005 Ford Explorer Sport Trac XLS 4.0L Misfire VIN: 1FMZU77KX5
P0304: Misfire cylinder number 4. ... P0303 and P0304. No distinct misfires felt. Using IDS cylinder contibution cylinders 3 and 4 are somewhat low at idle consistently. On road test as RPM increases contribution from 3 and 4 diminishes until MIL flashes...
May 04, 2019
1997 Ford F-150 Lariat 4.6L Misfire, MIL Lamp on VIN: 1FTDX18W5V
P0304: cylinder 3 miss fire. vehicle came in for running rough condition, found spark plug wires original and plugs very old, so we started out with a tune up & new fuel filter, cylinder compression around 145 on all cylinders. truck runs much better but still has miss under load ...
May 06, 2019
2001 Honda CR-V LX 2.0L Misfire VIN: JHLRD28441
P0304: Cylinder 4 Misfire Detected. ... miss at idle, seems ok at speed. always sets code asap. clear code, it returns. checked valve adjustment and all exhaust valves were tight, with 1 on cyl 4 with 0 clearance. adjust to specs cold. refire, codes return, miss returns asap. compression is ...
May 23, 2019
2012 Mercedes-Benz C250 1.8L Excessive Emissions, Misfire, Poor Fuel Economy, MIL Lamp on VIN: WDDGJ4HB7C
P0304: Misfire 4. car came in running,found fuel trims were at max.i used propane and found leaks around intake so I replaced intake gaskets and rechecked still seams that the propane will affect the fuel trim.was wondering what I may be missing?no other leaks are noticeabl...
May 24, 2019
2006 Nissan Altima S 2.5L Misfire VIN: 1N4AL11D66
P0304: Cylinder 4 Misfire Detected. Car came in as a no start. Found coolant in the cylinders and plugs fouled with coolant. Cleaned plugs, cleaned out cylinders. Car started. Replaced head gasket. Car started and ran good. Let run for about an hour. Took on multiple test drives. No issues. ...
May 30, 2019