Misfire at idle and low rpm
Misfire at idle and low rpm
Hey everyone,
So recently my Evo has been misfiring. It used to happen occasionally, like once every 50 miles, however now the car is beginning to misfire more often, but still intermittently which is why I'm so confused. Basically the car will misfire on idle and on light throttle (like accelerating from a dead stop) and highway crusing. However, whenever I rev the motor out, like cruise above 4k rpm or do a wot run, the car is absolutely fine and doesnt misfire at all. I just replaced my spark plugs yesterday, which I thought was the issue but wasn't, so just curious if this could be a coil related issues or something else? Just looking for some opinions so I dont end up spending money on new coils if I don't have to. Thanks!
So recently my Evo has been misfiring. It used to happen occasionally, like once every 50 miles, however now the car is beginning to misfire more often, but still intermittently which is why I'm so confused. Basically the car will misfire on idle and on light throttle (like accelerating from a dead stop) and highway crusing. However, whenever I rev the motor out, like cruise above 4k rpm or do a wot run, the car is absolutely fine and doesnt misfire at all. I just replaced my spark plugs yesterday, which I thought was the issue but wasn't, so just curious if this could be a coil related issues or something else? Just looking for some opinions so I dont end up spending money on new coils if I don't have to. Thanks!
Last edited by 4G63_Crazy; Jan 5, 2019 at 07:42 PM.
Bump for help
Also some additional notes - the cars cel came on back in early December and just popped up again a few days ago. They both only popped on for 2 minutes then went off, but was able to get the code before it went away. The code is P0202, which is injector #2 circuit malfunction. This was making me think the injector might have been clogged. I did some research and saw some people replacing the resistor box, however I have fic 1000cc injectors with the resistor box delete, so don't think that would apply to me. I checked the injectors pulse (with the screw driver trick) and they were all working fine. I put some seafoam in the gas to hopefully maybe clear some gunk, but the car is still misfiring on and off.
However, if the issue is a clogged injector, wouldn't it misfire all the time, not intermittently?
So right now the only two things I can think of are a clogged injector or coils... I'm pretty much stumped so any help would be really appreciated!
Also some additional notes - the cars cel came on back in early December and just popped up again a few days ago. They both only popped on for 2 minutes then went off, but was able to get the code before it went away. The code is P0202, which is injector #2 circuit malfunction. This was making me think the injector might have been clogged. I did some research and saw some people replacing the resistor box, however I have fic 1000cc injectors with the resistor box delete, so don't think that would apply to me. I checked the injectors pulse (with the screw driver trick) and they were all working fine. I put some seafoam in the gas to hopefully maybe clear some gunk, but the car is still misfiring on and off.
However, if the issue is a clogged injector, wouldn't it misfire all the time, not intermittently?
So right now the only two things I can think of are a clogged injector or coils... I'm pretty much stumped so any help would be really appreciated!
Last edited by 4G63_Crazy; Jan 5, 2019 at 07:36 PM.
Newbie
Joined: Mar 2018
Posts: 54
Likes: 2
From: IL
check for exhaust leaks? I had a somewhat similar situation, random miss at idle. Car was fine while driving but when i took my foot off the gas the rpms would dip, and sometimes it would stall(almost like when vta). Turned out my headers had a crack and my turbo/ o2 housing elbow gasket was shot.
check for exhaust leaks? I had a somewhat similar situation, random miss at idle. Car was fine while driving but when i took my foot off the gas the rpms would dip, and sometimes it would stall(almost like when vta). Turned out my headers had a crack and my turbo/ o2 housing elbow gasket was shot.
