Reduced power after Coil/Spark changes

[CLS70]

An update on this issue....seems all errors were true and for an unexpected cause.

Did not have time to deal with the X5 as was travelling but finally last weekend decided to check it out and see if there was something wrong with the TPS; so, started to remove the air box and to my surprise (and horror) when I opened it the AIR FILTER was completely destroyed (crumbling pieces)....

I'm still baffled thinking about how it could have happened - my best hypothesis is that a piece of foam made it way to the filter --odds?-- and then the blockage led to pressure build up to the point if finally failed. An option could have been a bird/rodent making its way through the air intake but there were no signs that could point to that.

In retrospective the errors I was getting seems to be due this and not failures of the coils/sparks. I did not remove the Air Filter assembly during the coils change.

When the filter crumbled, paper pieces and long strands of thin cord (?) made their way towards the Intake Manifold and completely jammed the throttle assembly flap (it was completely blocked), more filter debris made their way to the DISA valves (one broken - flap jammed inside the intake manifold), the other one blocked and inoperative as well...

I removed the Intake Manifold and there were debris inside, the main DISA flap (could not locate the pin).... further inspection of the engine block intake channels and valves did not show sign of debris (WTH?) - I checked with a endoscope and did not see any left over. If there was any, was sucked clean into the cylinders

Removed all parts, got DISA valves (used as I was not sure if the engine will crank up/start again), vacuumed the intake ports, valves, cleaned the Intake Manifold (pressure washed inside out), "cleaned" other sensors and re-assembled everything with a new air filter of course.

Reconnected battery and.......it started right up at the first try (LOL).......

Of course I'm getting a few new errors & CEL light; cleared them up but car was running -idling is fine- and revs up ok. after 10-15 minutes idling, took it for a spin and no more engine power reduced, it rev up with no issues...so those are the good news.

The errors/codes I'm getting now are *new* seem to be related to the Intake Manifold Pressure Sensor --I guess it may have been damaged-- and the Fuel Tank Breather Valve (stuck open).

There is slight whistle / high pitch sound; my best guess is that gap in the throttle flap, or could be that I broke or misassembled something and have an air leak

Still following up closely to see if there are new issues or unseen damage though.........so driving close by / with care....

[V12noise]

That certainly looks like a rodent's nest. They must have been quite comfy until the engine started...

[ard]

^ My thought as well

[andrewwynn]

Originally Posted by andrewwynn

PS: had a similar problem on my wife's m54 (01 e53) when the engine tried to ingest the o-ring from the MAF and jammed the actual throttle plate so maybe poke a look in there make sure nothing crazy happened like my case.

Prophetic?


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