cruising missfire

[bmxr152]

Okay so lately my car developed a misfire while cruising with very light throttle, most noticeable at lower speeds and not in boost or over 30% throttle. it will just it for a split second then stop Air fuels are around 14.7 while it misses. Ive Ohmed out my wires and plugs are new. I checked the ecu and no blown caps. Nothing on the datalog looks funky as in jumping around or anything. I ohmed out my injectors also and they tested 2.3-2.6 and also a boost leak test came out good but im using SD anyways. Ive been having an idle surge issue so I checked the ISC and #4&5 were dead. Any suggestions would be appreciated

 

[Lancer99]

Sounds Kind of like what I had. For me it was my coil pack. One of them had corrosion, so I clean it out good and it was fine. Then a couple months later it started happening again so I ended up buying a new one. Mine too was for a split second but then it got worse, hope that helps out a little.

 

[bmxr152]

Yeah thats what i thought, but i found out after spending all day testing circuits and sensors that i mixed #3 and #4 ignjector plugs when i pulled my manifold to do the alternator relocation.