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 Limp mode and CEL-boost leak code

 Created by: MortyMiniC137
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 Posted: Sep 30, 2019 04:58AM
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Let us know how the weekend fixes worked out.

Fyi, I just read another post where someone replace a Vanos valve to eliminate the P1497 error - maybe you might remove yours, inspect and clean it.....

 Posted: Sep 26, 2019 04:20PM
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So I was going to change the spacer out and put the bypass back on, but I had stripped the hex bolts removing the darn thing the first time. I inspected it the other day when I wanted to go back to OEM, and it looked fine, I even played with it a bit to see if I could find a tear or crack. A reliable source told me if I am eventually going to go with a bigger turbo anyways, I should get a new one to use with that, so I will replace it to see if that solves my problem. 

As far as he hpfp goes, I am still having the boost leak code and an occasional pending 'idle higher than expected' code. The HPFP may have not needed replacing actually, I did it because so many people have had similar symptoms to my car's and replacing it solved all of them. For me, I got a more consistent idle following the change and misfire codes went away, but that could also be related t my new coils and plugs. 

The thermostat housing was Febi bilstein I believe, I did not have to use any sort of adapter and my cooling system seems to be working great. The electrical connection on the thermostat housing was even oriented at the EXACT same angle as my OEM housing, I was rather impressed. 

Compression- I have not checked it, but my valves look like a septic tank, I will be walnut blasting them this weekend with a timing chain/guide replacement, crank seal replacement, and belt change.

As far as codes and limp mode, it shows P1497 every time. Sometimes I have a pending high idle code or something that doesn't place the car into limp. 

The other night I found one of my hoses disconnected. It was one that quick-connects to the one of the parts on the underside of the intake manifold, I really thought I had found my problem and drove the car for almost 2 miles without a CEL or limp mode. My car almost felt normal and great, then as I turned onto the on-ramp for the freeway, I noticed the power dropped and when I put my foot down a bit more Limp mode came on.  

Thanks kenatminimani and anyone else for your help, I will keep checking and updating this as I work on the issue.

 Posted: Sep 23, 2019 04:16AM
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My suspicion would have been the HPFP, but it looks like that is one of the last things you replaced and still have the codes and running issues?

You also mentioned a spacer on the bypass valve that makes it function as a blow off valve? - I would get that back to stock to eliminate that as a potential problem.

Did you replace the thermostat housing with a MINI factory replacement or aftermarket - and did the replacement require a wiring adapter?

This may be unrelated, but have you checked the compression?  Wondering if excessive carbon buildup on the pistons might be contributing to the problem (changes to the cr)?

After all that you have replaced, are you still having limp mode, and what are the error codes currently?

 Posted: Sep 22, 2019 05:08PM
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2009 MCS R56 - about 86k on it.

I have been having a ton of issues and lots of different codes, so I started replacing stuff. I have had misfire codes (P0303 and P0304), idle air control system RPM higher than expected (P0507), multiple misfires detected (P0300), boost leak (P1497), and a few I don't remember.

So far: I had a coolant leak, so I replaced the thermostat, water pipe, and pump.
Then I started having the limp mode and CEL problems.

The guys at the dealership ran codes, inspected my timing chain, and did a smoke test for me and found my catch can was leaking air, so I deleted the catch can and reconnected the PCV directly to the intake track. Still had a boost leak code.

Then I did spark plugs and coils. Car felt great but goes back into limp and reactivates the CEL.

I was getting weird, really rough idles, with no turbo spool or pressure release/recirculation (I have the spacer installed so it can blow-off rather than recirculate). If I had been driving for a few minutes and the engine was warm, the RPMs would climb and hold (usually at exactly 1,500 or 2,000 RPM) until I gave it a light rev, then it would fall, sometimes this would keep it at idle, sometimes it would just keep revving.
They did another smoke test and we discovered my valve cover was also leaking air/smoke from near the PCV itself.

So I replaced my valve cover.

I still get the limp mode and CEL back after clearing the codes and driving it. I start getting the symptoms like I described before, the revving issue when stopped, the lack of turbo-spooling and no feeling of boost, and the boost leak code.

So I replaced the HPFP and the flexible hose for it. Same code and CEL, no limp mode for over 3 days of driving about 10-15 miles.

I also did a fog light replacement and replaced the exhaust seal/gasket (mine was in pieces) because I had the bumper off and had a bit more room. I inspected my turbo on the block and the shaft of the turbine has light play and so does the actual waste gate. The guys at the dealership showed me a bad turbo with more play but they explained the symptoms and said while my turbo may be old and worn, it's not bad enough to warrant replacing, they insist I have to find this boost leak to see if eliminating that will give me a diagnosable problem, or a fix to the current problem.

I need some serious help. I have removed and inspected my recirc. valve but found no cracks or tears.
I did some starting fluid boost-leak checks on the charge pipe near its sensor and where it comes from the intercooler, as well as the intake manifold. No signs of a leak.
My valves look pretty bad, so I will need a walnut blast in the next 2,000 miles.
I will be replacing my crank shaft seal and belt, as well as possibly doing the timing chain (no cracks or breaks in my guides luckily, just a degree or two out of sync), all in the next week or 2.

I'm sure you may have more diagnostic questions for me, so I won't expand more. I have included as much relevant info as I can. I just want to get it running normal again so I can continue putting upgrades on it. Any help is much appreciated.
All your help is appreciated.

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