kalacho2006

Hi guys I just joined this amazing forum my car is a 5 series 2004 525i i just trade it for a jaguar X-type I used to have MAN A WHOLE WORLD APART SO DIFFERENT CARS, car is on Good conditions for the exception of these codes

P0300
P0305
P0306

I replaced spark plugs with double platinum and change coils around to check if the misfire move to another cilinder but no the misfire stay just on those 2. Now im sure the coils are ok.

Someone with similar problems and solutions,who can guide me in this problem?

frchdragon

From what I could find, it could be a leaking Injector O'ring or a massive intake leak. (vacuum lines, crankcase hose, vent valve... .....)
If you have access to a smoke test machine, it will help a lot.

kalacho2006

Ok can a VCG (valve cover gasket) leak count like massive I had a leak around that area dropping oil on exaust and making mi car burn that oil e every time o turn on the car.

By the way i just ordered the ccv valve and hoses, VCG gaskets and a vanos seals cuz the previous owner I think never repair this stuff ill keep updated
If I find something.

frchdragon

If you have dripping on the exhaust every day, this isn't good at all. You probably should fix it.
Doesn't take long, not a hard job at all and you will be surprised as your old gasket will be as hard as a rock.
Make sure that you are careful because small pieces of old gasket might fall in your engine.
Best time to do plugs unfortunately.

Next you will probably have to do the oil canister gasket. Cheap parts, not hard to do either.

Check your injectors and fuel rail if you can.
BTW, welcome to the world of BMWs, these cars can be a bit challenging to fix sometimes but the community is amazing and always ready to help.

star69me

I had the same issues in my 04 530i and change this that and the other and codes kept coming. It turned out be my manifold adjuster unit. There's a lil flap that breaks off that's supposed to open and close. I ordered one online and took the cheapest price of $257.00 vs $560.00 at the dealerahip. No more codes

kalacho2006

U re talking about the disa valve? Yes i already repair it.mine has broken internal pins the one that move the valve I bought the autozone kit repair for 5 series.

Ok already replace the old valve cover gaskets man they where hard like stone i had a bad time trying to remove the valve cover, Vanos was a piece of cake, tomorrow i'll replace the ccv hoses i see a lot of oil around that area so im spect some problem with it.

kalacho2006

Where is located that oil canister seal? Is the gasket that comes with the oil filter.

kalacho2006

Ok today find the problem for those with the same problem the hose that comes from the ccv to the dipstick was broken.causing a big leak and misfire condition,I replace the whole thing ccv hoses and dipstick gasket.

I replace the Vanos seals and valve cover gaskets too,man this car is working excellent now.

Thanks for the help and for the welcome, I have other not mechanical problems that I'll be posting here later.

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