p0300

Lookin for some input from the gurus! 06 jeep tj sport 4.0 auto, 23k original miles - Inherited 2 years ago and have been tracking a P0300 random misfire from day 1. Only happens on cold start/first start of the day, runs great otherwise (although power seems like it should be better, not my...

I have 2005 tj 4.0 auto keep getting codes p0339 & p0300 I have changed the camshaft and crankshaft sensor, full service change of plugs & oils etc, injector clean and currently have a ignition capacitor on order hoping that would be the weak link. it runs smooth when start up and idling...

Howdy been diving through the forum and was looking for some advice. Just bought a TJ In a great shape it spent its whole 115,000 mile life in a Arizona Garage and is in amazing shape. Cars been well maintained mechanically and I have every service record for it. I drove the car back to Colorado...

First post here, So my 98 jeep tj 4.0 with 167k miles auto trans threw a check engine light at me yesterday. I read the codes and it came up with 0300 0306 and 0138. 3 days ago I changed both upstream and downstream 02 sensors, removed and cleaned throttle body and cleaned IAC. The Jeep was...

So, after months of weird stuttering under acceleration, and occasional obvious misfires, my LJ is finally spitting a code (or rather 2). P0300 and p0303. Now, in addition to the symptoms mentioned before, I've noticed in the last few days that the engine will "stick" at ~1000 rpms or so till...

Hey Jeepers, My 1998 Wrangler TJ 2.5L Auto has been giving me some issues while driving. Recently, the engine has been giving me a sort of lag as I accelerate, more specifically within the 35-50mph range. Also, when pushing gas and pushing past 3000rpms, my Check Gauges light would pop on...

Was driving home today and my check engine light came on after what felt like a drop in power for a moment. Also a bit after that it showed a quick fluctuation if rpms. CEL then started flashing. I continued home as it seemed ok. I later went out and drive it around the block and the check...

Hey everyone. I've been lurking since I bought my 06 TJ auto about a month ago. This forum has helped me fix a bunch of stuff and I'm grateful. I've had some lingering codes/issues that seem to be getting worse. Most recent is a P0204 Injector circuit. I really don't want this to be a pcm, but I...

I have a 2000 TJ, 4.0L, 5spd with the check engine light on. Sometimes, it will start blinking for a short time then return to solid again. Here are the codes I'm throwing: P0205 P0300 P0303 P0305 So far, I've done the following: all new spark plugs, coil pack, cam shaft position sensor, and...

Hey all, I posted about an engine tick a while back so I decided to try some Seafoam just to see if it would help. I ran it through the throttle body, let it sit, then started her up let it smoke, let it run then took it around the block. It has sat in the garage for a little over a week...

Our 05 Rubicon has had no engine work or parts changed since we bought it 500 miles ago. It just turned 82,000 when the ✔ engine light came on, and started running rough. It shows a code P0300. Any thoughts? Part numbers? Thank You! P.S. yes it needs an oil change any recommendations? I take...

Because Jeep...... I have a P0300 code so its multiple misfies...but that is only code so doesnt specify a a cylinder. It doesnt run bad...it occasionally has a shimmy in the engine...would that be a whole coil pack to replace or still could be a vacuum leak? 2nd issue The oil gauge will...