Injection problem Bmw Serie 3 E92, what to do ?

No need to replace. Send them to RC to have them cleaned and flow tested. Injectors fail much more regularly and are replaced on direct injection platforms, rare to have a failure in port injected cars.

We have seen injectors down to 65% of original injection amount — many overlook this as a potential maintenance item. Good that you’re thinking about it

I checked out RC Engineering’s website, they are in SoCal. so not too far away, and will return the injectors within 24hrs, which is awesome.

Do you know what type of injectors the S65 runs? Top feed, hose feed or side feed?

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I checked out RC Engineering’s website, they are in SoCal. so not too far away, and will return the injectors within 24hrs, which is awesome.

Do you know what type of injectors the S65 runs? Top feed, hose feed or side feed?

This is the injector. Very simple little device.

Make sure you change the 2 o-rings when you service the injectors. There are no adjustemts or servicable parts. The injector service will run a bunch of concentrated cleaning agents through the injector to remove the swarf. They will also test to see if they hold a proper seal (which is not always accurate).

That said, the cost to ship and test an injector is not far off the cost of just buying new ones. For $300 you can get 8 new injectors and all of the o-rings and clips from FCP. Shipping, testing and o-rings is likely going to run you at least $250 (160 for cleaning plus tax, $40 for fast shipping total, $50 for o-rings and no new clips). Hell, the lower o-ring is $5 each (perhaps the shop that services the injectors can throw in o-rings for a better price).

You can clean them yourself with a few cheap accessories too. Check out this video:

12-02-2020, 03:37 PM #5

This is awesome. Thanks for posting this!

Indeed cleaning myself sounds like something I would rather do.

So I understand that the shop would flow test them as well, but they will not adjust them to flow better?

12-02-2020, 05:12 PM #6
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This is awesome. Thanks for posting this!

Indeed cleaning myself sounds like something I would rather do.

So I understand that the shop would flow test them as well, but they will not adjust them to flow better?

I do not think there is any way to adjust anything on these cheap injectors. Perhaps I am wrong about that and I would love to hear from someone who knows the absolute answer. Looking at the injector, there is nothing that can be taken apart or adjusted/replaced.

12-02-2020, 05:43 PM #7

12-02-2020, 05:46 PM #8
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12-03-2020, 12:11 PM #9

12-03-2020, 09:36 PM #10

12-03-2020, 11:57 PM #11

If you’ve been down to the TA’s before or themostat then it’s a DIY. plenum off, remove wiring from injector, slide back spring clip.. (don’t drop the spring clip). unbolt fuel rail. lift rail from engine with injectors. Remove sand/dirt from around the injectors before removal as best you can.
drain pressure off fuel rail. Disconnect line. capture fuel runoff. cap line.
flip rail around remove injector clip, remove injector.
oil new o-rings. insert injector, injector clip, reassemble.
Some have said you can do it without disconnecting the line but I don’t see how unless you ran the fuel out of the system first by pulling fuel pump fuse.
I don’t have the document handy so If I missed something please correct me guys.

Also I’ll second the suggestion above — Why pay to pull old injectors, ship them, service them, when an entire brand new set with clips can be had right now for under 300 bucks? There was even a deal over the blackfriday weekend for them at FCP.

12-04-2020, 12:56 AM #12

If you’ve been down to the TA’s before or themostat then it’s a DIY. plenum off, remove wiring from injector, slide back spring clip.. (don’t drop the spring clip). unbolt fuel rail. lift rail from engine with injectors. Remove sand/dirt from around the injectors before removal as best you can.
drain pressure off fuel rail. Disconnect line. capture fuel runoff. cap line.
flip rail around remove injector clip, remove injector.
oil new o-rings. insert injector, injector clip, reassemble.
Some have said you can do it without disconnecting the line but I don’t see how unless you ran the fuel out of the system first by pulling fuel pump fuse.
I don’t have the document handy so If I missed something please correct me guys.

Also I’ll second the suggestion above — Why pay to pull old injectors, ship them, service them, when an entire brand new set with clips can be had right now for under 300 bucks? There was even a deal over the blackfriday weekend for them at FCP.

Indeed the price of new ones is comparable to paying for servicing old ones.

Although I’m going to clean them myself and save $300 until I really need to replace them.

12-04-2020, 01:21 AM #13