[AWD Addict]

Originally Posted by swellengear

But from what you're describing, my bet is on a bent rod.

That was my first guess as well. This sounds like rod knock turning into a spun bearing.

[E93Dude]

Originally Posted by Cenflamark

By the way I inspected oil filter. No shavings but oil takes a long time to drain out of filter housing.

…Probably because the car runs rough and doesn’t have enough time to get the oil up to operating temperature. Am really surprised that the only code being the one is a MAP sensor with all the problems OP described.

Please run a OBDII scan and post the actual codes.

And did you really put all index 12 injectors in? A new set from FCP Euro is almost $2,500….

https://www.fcpeuro.com/products/bmw...13538648937kt2

[Cenflamark]

Hello! Well I have news! After the horoscope reading.. lol… I put the plugs back in and tightened to spec then put coil packs on randomly. The car started! It idols and RUNS!! I drove it 10 miles! BUT.. it runs like shit.. I know I’m probably damaging the engine. It takes about 30 seconds to get to 60 mph. And if I sit at a red light for too long it starts to smoke under the hood but IT RUNS!! Any new hypothesis’?

[swellengear]

You need to post your fault codes. All of them.

[Podunk]

Originally Posted by Cenflamark

Hey- thank you SOO much for your reply! It was bigtime informative for a novice like me. The car is an automatic. No cracked plugs or porcelain. But there was some carbon build up on them. I do have a borescope but I’ve never stuck it in the spark plug holes before. I will do that at first light. I hope you are wrong about broken rod but I think you’re probably right. I appreciate your insight. The car wasn’t cold when I punched it but that is the point of where it went wrong- like maybe something broke off or something. Runs like crap now for about 2 minutes before conking out. I got like 7-8k in the car and a dealership wants to only offer me between $1500-2000. I REALLY don’t want to sell it but I’m pulling my hair out here. I’ll let you know results of leak down. Thanks!

i get ya, a lot of money in the car for a shit return on investment. being automatic, removing the torque converter from the equation may be easier then if it was a manual, also knowing it is an automatic, and you mention more a shoe in dryer versus a unbalanced metal hunk in dryer, i have seen flex plates crack and sound like a bad engine. I've also seen them crack and bend and cause the torque converter to move oblong and make excessive vibrations and noise. although i haven't seen it on a BMW.. however if your modded it is a possibility.

the carboned up cylinders may have worn rings, a leak down test or compression test would verify, as it's likely from oil leaking past the rings into the combustion chamber.
however it could also be worn valve stem seals. ( why a leak down would say whether rings or stem seals)

good luck getting it figured out, once i get my VAC baffle i nstalled and oil pan back on, i get the fun of yanking out my manual trans and clutch assy/flywheel to replace a pushed out rear main.. YAY.. POS PCV system..

i've also come to the conclusion BMW means Bring my Wallet if your not mechanically inclined, and if you are "be mechanical wizard" ...

[whyzee125]

You're continuing to risk further damage by guessing and asking the web without even posting up what's been asked.

If you already know you have a bad MAP sensor, you have a good chance of running lean which may have already caused engine damage.

The clean piston tops would indicate the carbon has either melted off due to extreme combustion temps from a lean event or it's been washed off from leaking injectors.

The injectors absolutely have to be coded or they're spraying the wrong amount of fuel, further throwing things off.

Were they brand new or used/"reman"?