The hits keep coming. As soon as I fix one issue, another pops up. This time it's code P0021. From reading older posts it sounds like the VVT solenoid. Can anyone tell me where it is? If I can get to it I want to try and clean it.

Check the FSM and see if it's in there - link is in my signature

Ilya wrote: ↑

Wed Sep 13, 2023 12:36 pm

Check the FSM and see if it's in there - link is in my signature

Something isn't working for me. The page isn't responsive.

https://www.nicoclub.com/service-manual ... 1%2FEC.pdf
Component locations: EC-548
P0021: EC-732

I found it. Too difficult for me to reach it. Back to the shop I go!

And thanks for the help, guys. I'll report back with hopefully positive results.

So...please someone correct me if I'm wrong, but bank 2 is on the drivers side, correct?

Nope. That's a VQ. VK's all have bank1 on the driver's side. See EM-300:
https://www.nicoclub.com/service-manual ... 1%2FEM.pdf

VStar650CL wrote: ↑

Thu Sep 14, 2023 4:00 pm

Nope. That's a VQ. VK's all have bank1 on the driver's side. See EM-300:
https://www.nicoclub.com/service-manual ... 1%2FEM.pdf

Ok, so in that case, the solenoid on the passenger side (bank 2) was replaced today, but I'm still having the same issue where the car hesitates at either 1500 or 3500 RPMs. I also keep getting these codes since installing the PPE headers: P1148/P1168 ((open loop) and P0031/P0051 (circuit low). I replaced both sets of o2 sensors and wonder if the wiring/extension on the upstream was done incorrectly. The shop that installed the headers soldered the wires for the extension. Could that be the cause of the codes and the performance issues?

One thing I haven't checked, and I'm not sure if anyone else has, is the fuse. Didn't even occur to me. WIll be checking momentarily

So, the P1148/P1168 and P0031/P0051 were due to a blown fuse. I feel like such an idiot for not thinking to check sooner. I took the car for a drive and it ran great for the most part, but it still hesitated a couple of times at 3500 RPMs. Any insight on that would be greatly appreciated. No SEL after a good 20 minutes of hard driving, but when I got back I scanned and still got the P0021 and now I have a P0300. I'm not sure if those are holdovers from before I changed the fuse, though. I cleared them and will check again in the morning after driving it a bit.

The only other thing you can try in the way of parts is a new b2 cam sensor (actually a "phase" sensor on a VK). Sometimes a sensor that's "mis-hitting" or phase-shifted can masquerade as an IVT issue. If that isn't it, then chances are you have a hydraulic issue in the timing cover or a jumped chain. If your scanner will stream cam angles, take a look at both banks. They should be around zero at idle, if b2 is out by 3 degrees or more then it's likely your b2 timing chain has slipped.

VStar650CL wrote: ↑

Fri Sep 15, 2023 4:40 am

The only other thing you can try in the way of parts is a new b2 cam sensor (actually a "phase" sensor on a VK). Sometimes a sensor that's "mis-hitting" or phase-shifted can masquerade as an IVT issue. If that isn't it, then chances are you have a hydraulic issue in the timing cover or a jumped chain. If your scanner will stream cam angles, take a look at both banks. They should be around zero at idle, if b2 is out by 3 degrees or more then it's likely your b2 timing chain has slipped.

Started the car yesterday morning and no codes. Let the car run at idle for about 10-15 mins and nothing. Drove the car all day with no issues (it actually ran BEAUTIFULLY!!!) until I was heading home last night. SES came on and I now have P0021, P0300 and P0090. The timing was changed on this with the recall, so I don't know if it's the HPFP. With that update, do you still think it's the cam sensor? The solenoid I bought was the Duralast TS1035. Not sure if that helps or makes a difference.

I have an M45 with only P0021. Summary @
post6851139.html#p6851139

The faulty side was 20 deg different than the other, I had a bad migraine and don't know if the mechanic was referring to a temp monitor or phase angle. Is the hesitation between 2nd and 3rd gear? My M45S consistently does that from a cold start and I remember there being an optional TSB that adjusted the timings to not shift so hard to thunk/knock from cold.

CaduTwo wrote: ↑

Sat Sep 16, 2023 5:15 pm

I have an M45 with only P0021. Summary @
post6851139.html#p6851139

The faulty side was 20 deg different than the other, I had a bad migraine and don't know if the mechanic was referring to a temp monitor or phase angle. Is the hesitation between 2nd and 3rd gear? My M45S consistently does that from a cold start and I remember there being an optional TSB that adjusted the timings to not shift so hard to thunk/knock from cold.

I'm not having any hesitation now. The car is idling very rough, so I am not driving it. Trying to figure out what to do next besids pull my hair out

I haven't gotten an update from the mechanic since I posted. I'll respond when I do. Mine is idling well and driving well but can't pass inspection without that code staying cleared.

CaduTwo wrote: ↑

Sun Sep 24, 2023 12:25 pm

I haven't gotten an update from the mechanic since I posted. I'll respond when I do. Mine is idling well and driving well but can't pass inspection without that code staying cleared.

Mine is at the dealer. Hoping to get an update tomorrow or Tuesday.

Bad news. HPFP lifter bucket has worn through and the HPFP is "riding directly on lobe of Camshaft". Recommend timing chain service, replace HPFP and HPFP cam lobe. $8,000

Thanks for the update, sorry about the news. My mechanic had some personal things come up and hasn't gotten a look at it. Initial plan was to check angles, swap solenoid, crank sensor, see if that was enough, but it looks like we'll need a new mechanic for that. Is there a set guide/recommendation for how to decide on M V8 engine timing chain / gallery gasket and other maintenance at the same time versus a new engine and a recommended source/price for that?

Picked up the car today. VVT Solenoid, HPFP, camshaft assembly, timing chain camshaft, timing cover + several other parts, seals and labor... This car better run without problem for the next 5 years!