Misfire
#1
Misfire
Well you all know that i'm finally MSed and in the tuning phase. I'm curious to know what would cause a misfire under load and throttle about half way? It only happens when under load in the lower rpms (2-3k) and only happens once. The AFR's are pretty rich, in the 12:1 - 13:1 range, the IAT are around 120-130 degrees, and the boost levels are around 2-4 psi.
I have a feeling its a combination of the mixture being too rich and the IAT too hot. Is this a good assumption? Still trying to tune everything, just trying to get a better understanding.
I have a feeling its a combination of the mixture being too rich and the IAT too hot. Is this a good assumption? Still trying to tune everything, just trying to get a better understanding.
#3
I have the MS 1 V3 board and i'm using the OEM ignitors and coils.
Forgot to mention that I put in the wrong settings for the dwell and ran it for a little while. The ignitor got super hot and now the tach doesn't work, but the car still runs. Maybe thats the problem? Well I have a new ignitor on the way so hopefully thats it.
Maybe you guys could take a look at my spark and fuel maps. I'll post it when i get home.
Forgot to mention that I put in the wrong settings for the dwell and ran it for a little while. The ignitor got super hot and now the tach doesn't work, but the car still runs. Maybe thats the problem? Well I have a new ignitor on the way so hopefully thats it.
Maybe you guys could take a look at my spark and fuel maps. I'll post it when i get home.
#9
Ok, the plugs i have it at .035". The dwell i have it at whatever is posted on the DIYautotune how to mod for miata page. think it was something like 5 and 5.5, I forget, but its listed on their page.
When i took out the plugs to inspect them, they looked great. No oil or carbon deposits, looked really clean, the plugs are only about 1k miles old.
When i took out the plugs to inspect them, they looked great. No oil or carbon deposits, looked really clean, the plugs are only about 1k miles old.
#15
Ok, cleaned up the garage and replaced my ignitor. Still misfiring, but not as much. How do I upload files? I wanna upload my MSQ and datalog. I can't even see the misfires. Although, I noticed that when it misfires my tach bounces. Like when i'm at 2k it bounces to 3k and then down to 1k and back to where i'm at, all happens really fast. Could this be a ground issue?
Thread
Thread Starter
Forum
Replies
Last Post
AlwaysBroken
Engine Performance
4
09-04-2015 01:35 PM