Car hesitates and idles bad and stalls

Asked by Aug 09, 2017 at 12:57 AM about the 2003 Mitsubishi Eclipse Spyder GS Spyder

Question type: Maintenance & Repair

I just bought a 2003 Mitsubishi Eclipse gs 2.4L and
this is my first car and it ran great when I first
bought it. Got it cheap though so I was wondering
what could be really wrong and why such a good
deal... About 2 weeks later after buying it and
getting new brake disks, the car turns into poop.
The guy doing my breaks plugs a code reading and
says "it's pulling up that there's a miss fire". The
thing is, I walked into the the place with the car
running fine. I didn't have issues till he told me. So I
walked out of there thinking he's making it up,
there's no way I can have problems with a new car..
but I leave the corner and I step on the gas to the
floor to get a good feel and that's when I feel the
car stutter and basically feels like the gas is breaks.
When I pushed it down the car slowed down and
the RPM's was struggling to go up, sounded like it
was getting louder but wasn't going anywhere. So I
pulled off to the side of the ride and was pissed and
called everyone I knew that might have an idea. My
first thoughts was that this guy messed my car up
because I walked in there with a great car and left
with a bad one.. but after that, I made it home. And
I let the car sit for a day and the car ran better. The
car runs okay when slightly putting your foot on the
gas and slowly going faster but if u wanted to put ur
foot down on the gas it would stutter a lot and then
after a while maybe 3-5 seconds it will start to fully
burst into a sports car mode haha. But the
stuttering sounds horrible and feels like breaks for a
bit. I was starting to get use to this issues and was
deciding "okay the car runs okay as long as I slowly
go on the gas and not to the floor". But then soon
after I start the realize how bad it started to idle and
it started to stall on me. And now it has a bad start
up. Usually it's 1 miss fail and then I turn the key
again and the 2nd time it works fine. But i don't
know if that has to do with this. I took the car to my
friends and tried cleaning the MAF and it got stuck
at my friends house and the car wouldn't start, and
if it did if I put gas on the car it would stall, and it
would idle hard and give out shortly after. I had to
get it towed haha. Sounds like fun. But my dad
restarted the computer on the car somehow and
the car ran okay after that, but not back to its
normal state. Just back to its "slow gas peddle"
state. I cleaned the throttle body and the MAF
censor and it runs a little better after that incident
but still hesitates when going on the gas hard and
idles bad when at stop lights. Sometimes stalls but I
can feel it going bad so I put it in park and it sounds
better, I just put it back in drive as soon as the light
is green and im fine. I have yet to clean the IAC
valve because it's hard to reach to. But I plan to get
there to see if that helps. I also want to mention, the
car has a bad fuel neck. When I pump gas, it just
leaks out at least 20% of it. I noticed that the neck
is pretty rusted too so I plan on getting that
replaced but I have no idea if that could lead to any
of these issues, maybe having some rust stuck in
some tubs. I have no idea. Also want to mention
that there is no engine check light on as of the
moment.

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