p0300

Hey everyone. so my 2003 P5 has a pretty bad misfire i know i was throwing the p0300 code along with many others. i finally got around to replacing the upstream O2 sensor but i feel like i took too long. the car was drive-able for a while but it sputters badly at idle it sputters really bad...

Hi everyone, im new to this forum. I have a 2002 mazda protege lx 2.0 L engine. at 99000kms (canada) After visiting this forum, I've replaced my EGR valve, spark plugs, plug wires, ignition coils and still no luck. It did give me a code p0300 before but its very intermittent. Its very rough...

Hello all I really need some help. Two weeks ago out of the blue my girlfriends Mazda Protoge5 started running like crap. I took it up to the parts store and read the code which was a P0303 a cylinder 3 misfire. Same thing happened to her last year so she had it in the shop and had new plugs...

Hi, I bought a used Mazda6S V6 (manual transmission) with 97000 Mi. Before buying the car, I had AAA do a pre-purchase inspection. They found a few items - the valve cover gasket needed replacing, new engine mount, cracked boot. They assured me the engine seemed to be running fine and that...

Hi guys, This is my second time posting on here but I am at a standstill. I am getting the P0171 code along with the P0300. I have done a standard tune up (spark plugs, ignition wires, coil packs, cleaned MAF, cleaned intake filter) but still get the errors. I took it to a local shop who...

Need help here on how to best diagnose problem before spending a bunch of money on replacing working spark-plugs, coils, pumps etc. I only get a P300 no other code. Symptoms, part 1: - Car shaking at low RPM, using Neutral and revving at intersections prevented the feeling of engine stalling...

I need some help I am loosing my mind trying to figure this out. I have an Intermittent rough idle, While in gear like at a stop light it will act like a misfire and the RPMS will drop a couple hundred and then back to normal... sometimes at the stop light it might do it a couple of times and...

Title says it.. Replaced plugs, wires, coil packs, fuel injection cleaner. I do not have any power issues, it idles high when the engine is cold but sits at about 600 rpms when warmed BUT when idling it does fluctuate maybe 50-100 rpm. I planned on cleaning my egr valve this weekend but im...

My 1997 M-Edition Miata is experiencing intermittent P0300 codes. I changes the plugs and plug wires; it made no change. This happens one, two or three times each week. It can happen when cold or hot, when accelerating, cruising or decellerating; the engine does not miss, sputter or lose...

I have a p0300 code wich is a random misfire i havnt had all these symptoms like other people have. I felt a chug like once while driving on the interstate I changed the spark plug wires and the coils have the same specs as a brand new one. Can anybody give me any idea what to look for it im not...