[MHDBMW12]

Hi so I recently posted about throttle issues, sorry idk how to delete those posts. Anyways I disconnected the battery for an hour came back gave it a jump and boom no more throttle issues. However the car is still misfiring I’ve always had a shop diagnose my car and I fix it after. But it’s misfiring so bad can’t even take it to one. Very rough idle as soon as it starts up. Can see the whole car visibly shaking from outside.

Anyways it always seems to be starting with cylinder 6 and eventually moving onto all cylinders or only cylinder 6. What should I start with and how can I test it?

[e90yyc]

Do you have a scan tool?

[MHDBMW12]

Originally Posted by e90yyc

Do you have a scan tool?

Yes my MHD scanner just gave misfire codes nothing else. I also have INPA idk how to use it though I only had it for a brake flush. Maybe I can use that for information ?

[Serf27]

What engine?
Have you done any work to the plugs or coils recently?

[MHDBMW12]

Originally Posted by Serf27

What engine?
Have you done any work to the plugs or coils recently?

N54. Spark plugs and coils were done a little over 15k kms ago.

[MHDBMW12]

Originally Posted by MHDBMW12

Hi so I recently posted about throttle issues, sorry idk how to delete those posts. Anyways I disconnected the battery for an hour came back gave it a jump and boom no more throttle issues. However the car is still misfiring I’ve always had a shop diagnose my car and I fix it after. But it’s misfiring so bad can’t even take it to one. Very rough idle as soon as it starts up. Can see the whole car visibly shaking from outside.

Anyways it always seems to be starting with cylinder 6 and eventually moving onto all cylinders or only cylinder 6. What should I start with and how can I test it?

Anyone think it could be the HPFP the date stamp looks like it’s 2009. So it’s probably original I’ll double check but do the symptoms match? It happened while I was driving the car hard now whenever I start it, it misfires. Crank isn’t longer from what I’ve noticed. Would it give me a HPFP code? Or not.