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P0304 Diagnostic Trouble Code Discussion for October 2014

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2006 Volkswagen Golf GTI 1.8T 1.8L Poor Idle Quality, Misfire, lean VIN: 9BWDE61J86
This vehicle is a problem child! Misfires and runs lean only on cold starts for maybe 60 sec. Once secondary air pump turns off it will run perfect. I have changed every thing that was backed up by failed tests. The last thing was smoke testing for vacuum leak...
October 02, 2014
1999 Chevrolet S10 4.3L Hesitation, Surge, Misfire, MIL Lamp on
P0304: Cylinder 4 Misfire Detected. Truck came in with p0171 p0174 p0300 p0305 check injectors ok check compression 150 all check leak down test install new injectors new spark plug, wires, distributor rotor distributor cap, notice voltage at number 5 was 30kv the rest ok fuel filter was plugged...
October 07, 2014
1999 Chevrolet S10 4.3L Hesitation, Surge, Misfire, MIL Lamp on
P0304: Cylinder 4 Misfire Detected. Truck came in with p0171 p0174 p0300 p0305 check injectors ok check compression 150 all check leak down test install new injectors new spark plug, wires, distributor rotor distributor cap, notice voltage at number 5 was 30kv the rest ok fuel filter was plugged...
October 08, 2014
2006 Honda Pilot EX 3.5L Misfire VIN: 5FNYF18406
P0304: Cylinder 4 Misfire Detected. vehicle came back to us running rough and both vtm 4 light and cel back on. found oil in all sparkplug holes. upon talking to customer we discovered that another shop had put head gaskets on 5 mos. ago. we replaced both valve cover gaskets and cleaned out spar...
October 09, 2014
2007 Mazda 3 S 2.3L Misfire VIN: JM1BK32457
P0304: Cylinder 4 Misfire Detected. We are working on a Mazda 3 that keeps setting code PO304, miss fire on cylinder #4. We have checked: spark, fuel, leak down was 20% or less, smoke test was okay. We did reseal the intake manifold, have swapped plug, coil, injector. Problem does not follow, st...
October 10, 2014
2006 Honda Pilot EX 3.5L Misfire VIN: 5FNYF18406
P0304: Cylinder 4 Misfire Detected. vehicle came back to us running rough and both vtm 4 light and cel back on. found oil in all sparkplug holes. upon talking to customer we discovered that another shop had put head gaskets on 5 mos. ago. we replaced both valve cover gaskets and cleaned out spar...
October 13, 2014
2001 Subaru Outback Limited 2.5L Misfire VIN: 4S3BH68671
P0304: Cylinder 4 Misfire Detected. This car has had 3 coils in less than 3k miles, here is the history, we installed a coil pack, plugs and wires in January 2014, in June 2014 the car broke down 150 miles from our shop and was told he needed a coil pack, it seems when I had the owner bring me b...
October 17, 2014
2012 Honda CR-V EX-L 2.4L No Start, Misfire VIN: JHLRM3H76C
P0304: cyl 4 misfire. Thanks for reading this guys. This car presented like a bad timing chain . Went to start it barely runs making no power. Hooked up vacuum gauge had 8in vacuum . get the go ahead from customer to pull timing cover . Pulled cover exhaust cam was one tooth off . ...
October 20, 2014