Check this if you have a P0300 random misfire!

P0300 engine code can send many owners through countless loops. The code could be thrown for so many reasons. So, in this video I break down everything I know about figuring out the cause for this issue. P0300 misfire. Random Misfire P0300

Parts/Tools:
Mass Air Flow Sensor Cleaner: get from store, it is cheaper there

You'll have behind the scenes access and more!


I have a website:

#BuildsUnited #P0300 #ChevyAstro

Disclaimer:
Due to factors beyond the control of Builds United, I cannot guarantee against improper use or unauthorized modifications of this information. Builds United assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Builds United recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Builds United, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Builds United.

Furthermore, the links posted within the description may or may not contain affiliate links. If used, I truly appreciate the support!

Time Stamps:
0:00 P0300
0:11 Spark
0:14 Distributor
0:57 Camshaft Sensor
1:17 Crankshaft sensor
1:33 Spark Plugs
2:08 Spark plug wires
3:12 Wires groundout
3:35 Fuel
3:41 Fuel pump/Checking fuel pressure
4:20 Spider injection/ Fuel injectors
4:50 Dirty fuel injectors/bad gas
5:36 Air
5:40 MAF
5:57 FaultyO2 sensors
6:23 Engine compression
6:48 Faulty Piston ring/Bad Valve
7:10 Headgasket
7:20 Stretched out timing chain
7:34 My misfire
8:24 Teaser

[antoniomarin]

Great to hear you fixed the misfire, and it was something so easy. Vans looking awesome.

[christianpena]

I wish you made this video years ago, Thanks for the info I'm sure this will save a lot of pain and frustration for a lot of people.

[malikchams]

i have a 1998 gmc safari with the same problem and same code about 2 years ago and my issue is that it would fill up with posture causing the points on the distributor cap to corrode what i did to fix the problem was to buy a marine-grade cap and rotor made out of brass that's hydrophobic meaning water doesn't stick to it do that and most likely that will fix you i know you fixed your issue but in the future this may be something helpfull


cheers

[dognatious]

Very well done video. Code 300 is a nightmare. You organized it very well.

[AstroVanTribe]

You're SO much better at this than I

[AlwaysDiagnoseVehicleFirst]

I have a 2003 DODGE CARAVAN SE V6 3.3L

The minivan is giving me a P0300 code.

I turned on the engine and left it idling.

Connected a test light to a ground and connected a vacuum gauge to a vacuum port on the upper intake manifold.

I did a cylinder drop test using the test light while removing one wire at a time from the coil pack and observing the vacuum gauge needle for movement.

As i was removing one wire at a time from the coil pack using the test light the vacuum gauge needle was not moving so i can know which exact cylinder is misfiring.

Do you happen to know why the vacuum gauge needle was not moving?

I uploaded videos on my channel so you can see the tests i did can you check them out, please?

[bendarkstarkiller]

Hey my pressure gauge fluctuates from 50-60 very bouncy what would you think Chris? Bad fuel pump or spider injection?

[jefferywarburton]

Mine had a floppy coil that liked to ark out and provide spark to the trans. dipstick tube.⚡

[jacklumbr]

What’s up man, love your Disastro videos. I just recently had a super cool guy break into my 2000 Astro and try to steal it. He cracked open my steering wheel column cover and in the process cut one of the wires to the steering wheel on top of flat heading my ignition coil. I spliced the wire together and can get a key in my ignition but now I’m getting a P0300 code. Can this be because of the wiring, or is it unrelated?

[Javiersmobilebar]

I replaced my fuel injector with an acdelco fuel injector and the pressure still bleeds off when I turn the engine off. Could it be the fuel pump causing this?

[KEROT]

I have a 2001 astro and every morning it cranks but doesn’t start only after trying for like 15 min. Usually my battery dies. Whats weird is in the afternoon it starts after like 3 cranks. I checked fuel pressure and that is ok. Also once it starts one time in the day it doesn’t do it again until next morning so i feel it has something to do with the weather .

[noragodley]

I JUST took my 02 Astro in for that code yesterday!

[mannyfrommiami]

is it more likely that a Misfire causes both o2 Upstream codes to pop, or bad o2 sensors causing a misfire...

[maxeffenberger]

Great video, i have a 1993 Astro and it is stuttering at more then 50 percent throttle, i heard that the throttle position sensor can cause this, do you know anything about it.
But what i also wanted to say is, that you are doing the best Astro Videos on YT :-)

[deepclean]

I change the injectors . Spark plugs and wires. Distribuator and cap and rotor . on my Astro
After 3 months the p0300 came back on

[marklennox]

My 2000 AWD is not having this particular issue but thanks for posting. I watch all your videos and your rig looks awesome! You better undercoat that son of a bitch so it lasts and you can keep with the information!

[piscespixie]

Mine is having a p0301 cyclindar misfire detected