For the past month or so i have been having a misfire issue. When i drive the car hard sometimes i hear puffing noises when im above 5.5k rpms or so. Before, i took it to autozone to have them check if it was throwing a code, and it was a cylinder #4 misfire. I changed the spark plugs and took it into the Mitsubishi dealership. They switched the coil plugs to see if the misfire would follow. the SES light was off for a day then it went back on and has been on ever since. I took it to Autozone again and now its a multiple/random misfire. I still hear the puffing noise.

If anyone has any idea what could be wrong please tell me what you think. Thanks!!

 

make sure your coils are ok. if they are an you changed your plugs you might want to consider a compression check!

 

Yet another 2003 VIII P0300 issue.

Check/replace plugs and check gaps. I don't think it'd be the coil pack. Maybe spark blowout?

 

I am trying to get it fixed by this weekend. any info would help. Also if this means anything, when me and my friend in his stang were driving i pulled ahead and he said flames shot out of my exhaust.

 

is there a way to test the coils? im having a misfire issue also and i changed my plugs/wires/ coil boots

 

anyone?

 

There has to be someone that knows what the problem is..

 

I had the P0300 issue on my stock motor IX for one day and again a few weeks after, CEL cleared itself and I took it to the stealership afterwords and they didn't know what it was either. Everything checked out fine according to them.

I haven't had it since. Hope you figure it out dude.

 

what are your mods, and what type/heatrange/gap are you spark plugs?

 

that could be a coil pack problem...coil is where spark is made...coil/bad = misfire

 

The spark plugs i put in are NGK Laser Iridiums IGR7A-G. Here is the link http://www.partsamerica.com/productd...pe=960&PTSet=A

 

There has to be someone who can help!

mods are stainless o2 housing, three inch turbo back exhaust, injen intake and lower intercooler piping, HKS 272 cams, cam gears, arp studs, 255 lph fuel pump, EXEDY twin disc clutch, stainless braided clutch line, and a custom tune.

 

that link wants u to fill something out, i could be wrong but those plugs sound wierd, i would us ngk bpr8es
gaped at 24

 

Vehicle: 2003 MITSUBISHI LANCER EVOLUTION
Engine: L4 2.0 Liter Turbo FI

Laser Iridium Spark Plug: Oe Style; Gap @ .032

those are the details of the spark plugs.

 

ya bro i would take those out and run

ngk:bpr8es
gaped at 25 depending on how much boost you run