I have had this code for months now. There are no noticeable driveability issues, except for a slight stumble when the car first starts.
I’ve installed new plugs, wires, and two good coils. Could it be the injector?
Thanks.
my recommendation would be to consult a mechanic to diagnose the cause of the P0302 code. They have the tools and expertise to pinpoint the exact issue and recommend the proper repairs.
That P0302 code is a pain, especially with no real problems driving (except the hiccup at start). Low tire pressure can feel like a bumpy ride, but it wouldn’t cause a code. This is more likely an engine issue.
One possibility is a vacuum leak. Leaks mess with the air/fuel mix going into the engine, causing misfires. You can find DIY guides online to check for leaks, or take it to a shop for a smoke test.
Another thing to consider is compression. Lower compression in cylinder 2 can also lead to misfires. Testing this requires a compression gauge, and a mechanic might be the best bet for this step.
Checking for leaks and compression should help pinpoint the problem.
I recently purchased it, and because it’s still inside the 30-day window, I was considering asking for a refund, but since it came from a private seller, it would be difficult.