eels
Greenie N00B Member
Just bought my first speed about two weeks ago so Im sorry if I come off noobish in this post
Year/Make/Model: 2008 Mazdaspeed 3
Mileage: 123000
Location/Alitutude: Meridian, ID (2,605' sea level)
Concern: Misfire on cyl 3. Weird idle during startup. Overheats and burning electrical smell (might be unrelated)
DTC's: P0303
Modifications: Completely stock to my knowledge.
ECU/Tuning Software: Cobb Accessport V3
Tuner: No tune
Is the concern intermittent? No... Always has the same weird idle.
Recent Repairs: Oil change. NGK Iridium IX TR7IX spark plugs gapped to .28
The first minute during startup starts with a high and inconsistent/ hesitant sounding idle and eventually smoothes out to normal within a minute. Also, I don't know if this is a separate or related issue, but the engine appears to overheat despite the coolant temp always remaining within operating temp (under 215 F) Even when driving for 30 plus minutes the radiator fan never turns on and I can notice a burning electrical smell around 15 minutes of driving. The engine feels way too hot when I pop the hood after a drive. No codes besides the P0303.
I changed the spark plugs and oil right when the misfire code happened and realized the previous owner had them gapped at .35 (ouch) but it did not resolve the CEL or the weird idle. After the idle smoothes out I don't notice anything different about the driving (still pulls real nicely) other than it can be a little jerky when decelerating in a low gear and the overheating issue. I switched the 2nd and 3rd coil packs but the misfire still occurred on the 3rd cyl.
I haven't compression tested or inspected the fuel injectors yet. VVT was done 20,000 miles ago.
Can anyone give me some guidance on what I should do next?
Year/Make/Model: 2008 Mazdaspeed 3
Mileage: 123000
Location/Alitutude: Meridian, ID (2,605' sea level)
Concern: Misfire on cyl 3. Weird idle during startup. Overheats and burning electrical smell (might be unrelated)
DTC's: P0303
Modifications: Completely stock to my knowledge.
ECU/Tuning Software: Cobb Accessport V3
Tuner: No tune
Is the concern intermittent? No... Always has the same weird idle.
Recent Repairs: Oil change. NGK Iridium IX TR7IX spark plugs gapped to .28
The first minute during startup starts with a high and inconsistent/ hesitant sounding idle and eventually smoothes out to normal within a minute. Also, I don't know if this is a separate or related issue, but the engine appears to overheat despite the coolant temp always remaining within operating temp (under 215 F) Even when driving for 30 plus minutes the radiator fan never turns on and I can notice a burning electrical smell around 15 minutes of driving. The engine feels way too hot when I pop the hood after a drive. No codes besides the P0303.
I changed the spark plugs and oil right when the misfire code happened and realized the previous owner had them gapped at .35 (ouch) but it did not resolve the CEL or the weird idle. After the idle smoothes out I don't notice anything different about the driving (still pulls real nicely) other than it can be a little jerky when decelerating in a low gear and the overheating issue. I switched the 2nd and 3rd coil packs but the misfire still occurred on the 3rd cyl.
I haven't compression tested or inspected the fuel injectors yet. VVT was done 20,000 miles ago.
Can anyone give me some guidance on what I should do next?
