rough idle

Hello, My new to me 13' Speed 3 threw a CEL the day after I bought it, O'Reilly scan showed a p0172 code. Additionally, whenever I cold start the car it idles rough with slight pops, but goes away once the engine warms up. I drove the car home (1000 miles Phoenix to Denver) after clearing the...

My genpu has a rough idle where it makes a small sputter every few seconds, I also get a p0300 random misfire code that comes on every few cold starts. I have done everything I can think of to fix this issue. I've changed the spark plugs, cleaned the valves, rebuilt the HPFP, changed the o2...

I've had a slightly rough idle for a while now, no codes or rpm fluctuation, but it sounds and feels like a small sputter/pop every few seconds, only when fully warmed up. 2010 with 62k miles, injectors and valves recently cleaned. Logged HPFP pressure after turning the car off and pressure only...

hello everyone, pretty new here and looking for advice. so I've been chasing down this problem for quite some time, it all started when i swapped my oem catted down pipe back on for emissions from my catless dp also during that process I decided to clean the egr valve and throttle body. When I...