P0421 & P0303 hesitation/missfire 2003 2.4 Mitsubishi Eclipse
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- Опубликовано: 9 сен 2024
- This video will give you some basic steps on what to look for if you are experincing hesitation or miss-fire on acceleration(mine had symptoms only if I was more than half way of throttle), along with the check engine light codes listed in the title. This is specifically on a 2003 Mitsubishi Eclipse, but can apply to similar era vehicles
Thank you for a great video, seriously I appreciate it.
I have the same engine in my 05 Stratus, it's giving me exhaust catalyst too cold, and fuel evap gross leak and I'm having the same issues, tried cleaning the throttle body, new TPS sensor, cleaning the MAF, looked for vacuum leaks, blew out the purge valve and it's now giving me 3000rpm vs barely over 2g so I'm gonna definitely try this out and if anyone can think of anything else that may be causing it, already installed a new gas cap, fuel pump, injectors, rail, pressure regulator, and IAC all to no avail
I've got the same car except it's a 2001 with 205k miles. I smoke-tested the intake on mine today and there's a pretty big vacuum leak coming from each end of the throttle blade shaft. My car will misfire a few times when accelerating from a stand-still (the tach needle jumps erratically too), and then it will almost die at idle when it's warm. The tach will almost hit zero, and then it'll catch itself and idle normally. It hasn't thrown a CEL yet, but I know there's a problem. It runs great at full throttle with high RPM, so I'm pretty sure the vacuum leaks are the problem. I don't want to find another throttle body but that might be the only way to repair this.
Could be EGR related also. I'm fighting issues with this now. Seems like once I hit 200k it's been one problem after the other
@@thechauffeur9726 Same for me, around 200k miles is when a lot of parts start to go bad. I still like the car though, I don't regret the money and time spent keeping it up. It handles great, and it's got a ton of carrying space.
My misfire is getting worse. I don't think it's the throttle shaft leaks, I'm pretty sure one of the two ignition coils is going out. The tach doesn't drop to zero, it drops by half the current RPM. I'm going to check the plugs and replace both coils pretty soon.
I'm getting the p0421 on the same car and engine. The car had been sitting for a while before I bought it and I had the same symptom of not being able to put the pedal down.
The regulator seemed to free up after a few weeks of driving and also working out some cooling issues. But still getting the p421 code. Going to try new sparks and cleaning the MAF/throttle body before going for the regulator as it is a bit pricier. And see if It fixes.
MAF seems to be pretty common for the code and symptoms too. I'd bet on the MAF
Po421 is a cat code
@@jedidias7091 you're right, I was thinking of 303
@@jedidias7091 you're right, I was thinking of 303
@@thechauffeur9726 random cylinder miss I think that is. But can be fron multiple reasons
i have the same engine and the idle is going crazy i didt everything exep that i wonder if thas the problem what you thing
Did the check engine light come back on after you did this
I have a 2003 Chrysler Seabring with the 2.4 Mishibishi engine that is throwing the MAP sensor code at me. which makes it confusing because iv been searching for a 2003 Seabring MAP sensor and it is completely different.
The MAP/Idle air control sensor is the same between the about that year Chrysler and this Mitsubishi. Part number RM31320001. The fuel pressure regulator may be different
@@thechauffeur9726 yeah it looks like the park is PS10078.
Where can I find that little vacuum hose?!?
Junk yard if you wanna get it cheap
Did it idle well and run rough?
It would hesitate under acceleration
Mistubishi 0421 code
Much appreciated bro 💯 you got an Instagram?
You throwing out a white power sign?? Fuck out here high school drop out
@@thechauffeur9726 grow up ya cock sucker I'm the only one that graduated outta five siblings
@@christianmcrae5389 sounds like you come from a family of idiots. Graduating high school isn't hard and you inbreds could only manage a 20% graduation rate.