Vehicle Misfiring? Try this first! P0300

[@sunderland86]

I've had this issue two separate times several years apart. (Multi cylinder misfire, with shuttering) Both times the fix was actually just the boots and not the coil pack. It's worth doing a boot swap before spending money on coils. Only difference was i never threw a code for a specific cylinder just a p0300. Its possible to swap the boots without taking the intake off, but it was very frustrating. Had to separate the boot from the coilpack while still in the sparkplug tube, and install the boot first then assemble it back onto the coil pack while it was inside the sparkplug tube. May have been faster to just take the plenum off because i fought it forever lol. Thanks for the videos, you have helped me get through many repairs.

[@FoamSquatch]

I have this same issue on my 2008 Frontier. Started with Cylinder 3 misfire. Threw a coil pack on it and it fixed it, then two weeks later my drive to work was just like yours. doing full plugs and coils now. The plugs are trashed probably the originals 140k miles old at this point. gotta put the the intake back on in the morning and testing it.

[@mr_e_mc2]

I just have to laugh at this because I have LOVED your content for years now helps me out so dang much with an 06 manual off-road trim X at 154k miles and I get the exact same issue as you that crop up within days of when your videos go live with the fix keep up the good work dood!

[@Rythecarguy]

Haha well im sorry you have the issues but I am glad to be there to help!

[@rcnewcomer7304]

​@@Rythecarguy Hi! I have p0300 only, changed plugs, sparks. Nothing helped. What should I check?

[@Rythecarguy]

@@rcnewcomer7304 I hate to say it man but it sounds like your timing might be off. You could have skipped some teeth during the install.

[@rcnewcomer7304]

@@Rythecarguy thanks for your answer!

[@rcnewcomer7304]

@@Rythecarguy before this happened, the timing chain was changed

[@allenwoodring4447]

If you can wait two to three days Amazon would have your best deal on a set of coil packs.

[@user-dz2pz3ol7p]

Those are garbage

[@allenwoodring4447]

@@user-dz2pz3ol7p which ones if you're referring to the ones I bought I've got 63,000 mi on them pretty good for garbage!!!

[@jameswatt8841]

Ohh lucky you got a code. Mine is subtle when load is applied i think it’s a crank sensor.

[@hifiman4562]

I just changed the plugs on my 05 X. I didn't need coils but I definitely changed the most difficult coil. The one we all know is a huge pain. Only did the one, with an OEM part. My worries are soothed for the time being.

[@alxjhn]

got the same dreaded P0300 code on my 2006 Nissan Xterra. just did the valve cover gasket . MAF was replaced because there was a code.. Now the P0300 is on , no more MAF sensor code

[@eciaccord]

Hey man, thank you so much. Your video just helped me figure out what was wrong with my Nissan.

[@elonsus9747]

My 05’ Xterra had a misfire, P0300 and P0420. Previous owner replaced cats fairly recently they look brand new. So it better not be cats. Replaced with new coils and plugs and no more misfire or codes, for now…I’m approaching 200,000 miles. Edit: The cats were shot. Completely gone. No honey comb left. Replaced with cheap coils and spark plugs because I needed to drive to work and back. No more misfiring. Fast forward to today I have the same code P0300. No Cat codes thankfully. Gonna replace my could and spark plugs again with denso. Cats were replaced as well.

[@michaelspencer4152]

My 05 Pathfinder started up the other day doing the same thing. It stopped after a restart. At 200k miles, I think it is time to invest in a code reader.

[@mlm32809]

Usually it’s a bad coil boot if you get a specific cylinder and the boots are far cheaper than the coil. Look for a hole on the side of the boot near the bulb end that goes onto the plug. Swap boots with another coil and reset codes, if the misfire is now on the other cylinder only then it’s the boot.

[@Rythecarguy]

Great tip!

[@PaulHenreid]

I am getting a P0300 and things improved by replacing all the plugs that were fouled from an internal oil leak, not sure the source of the leak but appears to be the valve cover gasket and possibly a blown head gasket. But going down that road means timing job and might as well replace the valve stem seals that came with the timing kit. I am ready to breathe new life into my six speed 114k miles 2007 Xterra - Basecamp (X) trim 4WD. I have been getting a squealing noise towards the back shortly after startup when the vehicle is not moving; any ideas are appreciated.

[@johnm112]

when mine did that the screw from the rotor in the distbuter cap came out out

[@None-m6t]

What the hell is that red thing out the back window at 5:32

[@Rythecarguy]

That's a stop sign....

[@unggoymaster1217]

​@@RythecarguyI think he meant that go kart thing.

[@paranoid5881]

How about a 2nd gen nissan xterra with no power up hill?

good job. would have luv to get the TORQUE info still.

[@Rythecarguy]

Some day

[@julio1982]

What paint is that on your rims??

[@MaximumDIYGarage]

Ry, have you ever considered replacing the faded corner pieces of the window seals? Are those even available for replacement?

[@Rythecarguy]

I have not been able to find them

[@rhef13]

Unrelated but is it possible to change the rod bearings (rod knock) without removing the engine? I need to find a bandaid for my sons cars until we can replace the engine.

[@Rythecarguy]

Well the engine mounts are in the block and the cross member is further up towards the steering. I suppose you could theoretically drop the lower and upper oil pan while it's still in there. I think it might be possible. It would be one hell of a messy job though. If you try it please let me know. I would be very curious. the problem you will have is of the crank has to come all the way out.

[@rhef13]

Sounds like it might be to much to attempt. If I do it I will definitely let you know. Thanks for the response and all of your videos!!!

[@Rythecarguy]

@@rhef13 my pleasure. Hope it goes well.

[@epistemophilomath]

Hey Ry. I have same symptoms on my 2008 as well as P0300 code. I replaced plugs and coils and cleaned all injectors to no avail. My next approach is replace fuel pump assembly in case it’s pump or filter. Am I on the right track? I also have P0340 camshaft sensor but I thinks it’s unrelated.

[@enriquegarcia8246]

Cam code will directly correlate to it

[@ClarkS963]

My misfire ruined the catalytic converter. Too much unburnt fuel into the cat. Hope you have better luck!!

[@Rythecarguy]

Oh snap, sorry to hear that man. I don’t have any codes or anything and I have been driving it. Hopefully its good for now. Not really wanting to change those out.

[@mikemorgan4670]

Good one. Nice easy fix.

[@everready19373]

Don't you document all of the maintenance you do? I do. I did PM on machines most of my adult life.

[@ahmadghosheh3104]

When I sold my Xterra with 190K miles I gave the buyer endless pages of detailed services 😂. I keep everything in spread sheets date, service, part numbers, cost, where purchased, issues. The buyer said if it wasn't for that they would have bought a high mileage SUV. Then, I took them on a tour in the engine, where is what, showed them the tags and lables I put on items that need special attention, pointed out issues to look for, ibthink they got bored at the end, just give us the keys dude 😂

[@Rythecarguy]

Nawww

[@Rythecarguy]

This is the right way to do it. I just never remember to do it.

[@arzibanez3924]

Maybe the injector bro

[@Rythecarguy]

It could be, luckily it was not.