Hi all, I recently have been having some problems with my R53 and havent really found any concrete solutions. She started idling rough maybe three weeks ago after changing my belt and idler pulley. The previous belt was about a year and a half old and started showing sings of wear and I thought I was getting a noise from my idler pulley. After replacing both, the whining sound persisted and the codes started to pop up.

My car can barely hold idle sometimes dropping all the way down to 0rpm and stalling. There is significant power loss and trying to get on it above 3k rpm causes it to "choke up" and sputter for about three seconds and after that everything seems relatively normal. Also out of the blue, it will hold idle but the sputter is still very present when accelerating. I've basically been heel-toeing the last few days manually idling the car cause your boy has to get to school/work.

P1239 and P1242 are related to the TMAP and MAP sensors respectively and I replaced both thinking that would resolve the issue, which it didnt. Coincidentally (or not idk), my fuel pump started going out and my engine threw a "fuel bank 1 too lean" code (I know this because the pump would not prime on ignition, and the hammer trick worked fabulously for a day or two), so I changed the pump and the filter which cleared that code.

I have not visually inspected the crank pulley or tested the spring on the BPV yet which (again Im assuming) are the next likely culprits. I guess my question is could a crank pulley or BPV be associated with the P1239 and P1242 codes? Also the whine is still present so obviously either my crank, idler, or tensioner pulley is on the out. I'm going to check everything anyway but I'd like to know if I'm at least on the right track. Thanks all.

 

Okay so for anyone searching these codes it ended up being either the MAP or TMAP. I replaced both twice, the first time with amazon parts and the second time with sensors from Rock Auto. Upon start it displayed some of the same issues but those cleared up about two minutes later and I was back to ripping up the streets. Happy Motoring.