[batman_e92]

Hey Guys

I am about to torch this car, I am so frustrated with it. Every time I fix something something else breaks.

So last month I replaced all spark plugs and the car ran fine the whole time. A couple weeks ago it was raining really hard and I was driving around town getting stuff done and then the car started to misfire and stutter. I figured OK must one for the coils, so I did what my buddy told me which is while the car is ruining remove the coil plug if it gets worse then the coil is OK if not that means the coil is fine.... So I got it narrowed down to the last Cyl closest to the fire wall. I replaced the coil and the car is still not running right. I tried another new coil no change, I get the car scanned it says Misfire in Cyl 6.

Some posts here say it might be the injector, how can I trouble shoot that ? Also is true the only way to get a new injector to work with the car is by taking it to BMW for them to program it?


Any thoughts here guys? I spent over 2K on this car int he last month and Im not even enjoying it before it breaks again.


2007 335i with a 124 KM on it

Thanks

[tc535i]

swap the injector from 6 to 5, see if the misfire follows it

[Zach1328]

Originally Posted by tc535i

swap the injector from 6 to 5, see if the misfire follows it

+1. Its easy to change them over. Never pull the coils while the car is running that's a bad way to diagnose it.

It could be a bad plug again. Is your car modded? These cars burn through plugs when they're tuned. Did you check the gap on the plugs before installing them? One of the 6 plugs you received could have been miss-gapped and therefore faulty.
The fuel injectors are also known to be faulty. Did you ever have them replaced under the recall?

When I get a misfire I always go in this order:
1) Swap coil #6 with coil 5. If the misfire moves to cylinder 5 its the coil, otherwise move on to spark plugs.
2) Swap spark plug #6 with cylinder 5 plug.
3) If its not plugs or coils then swap injector 6 with injector 5.

[batman_e92]

No I never got the injectors replaced under warranty . The car is completly stock right now just adual cone intake

I will do what you recomended and post an update

Thanks

[batman_e92]

So I swaped the coils and spark plugs ... still the same cyl 6 ....how easy is it to swap the injectors? And dont they need to be programmed etc?

[Pr335bob]

Injectors are easy! Just download the program to code them in your laptop and get the appropriate cable. There is a diy here search in Google. Now if you buy the new style injectors you can only get them by 3s. Mean if 6 is malfunctioning you'd have to get injector 4 5 and 6. But by what your saying I'd bet on injectors. Same thing was happening to me but on cylinder 3.

[batman_e92]

Intresting so I cant replace just 1? And if this is a recall snouldnt bmw cover this?

[Pr335bob]

If you get the new style injectors you can only replace 3 at a time. Now you can go around that and get some used injectors that are working and only have to replace injector 6. I have no idea if there is a recall if there is let us know.

[Pr335bob]

Also if you decide to do that or anything electrical on your BMW . Do yourself a favor and disconnect the negative on your battery. You won't have to wait until it goes to sleep mode and it is a lot safer.

[batman_e92]

Originally Posted by Pr335bob

If you get the new style injectors you can only replace 3 at a time. Now you can go around that and get some used injectors that are working and only have to replace injector 6. I have no idea if there is a recall if there is let us know.

I will call the dealer tomrrow and see , I think I read that this is a recall some wherever I might be wrong. Ill post an update once I get one

Thansks for the input

[batman_e92]

So there is no recall on the Injectors, so if I get a used one I wont need to get is scanned or it work in my car ?

[4doorbmwpower]

not 100% on this but i think even a used one would have to be coded to YOUR car.

anyone got the 100% affirm on this

[Pr335bob]

Yes it would have to still be coded used or new

[Pr335bob]

Trust me if you have the software it's on here on e90post. If you have the software it'll be easy

[batman_e92]

What is the sofware called ? I have the jb4 cable and could get there software ?
Will that work

[Pr335bob]

I have Cobb so don't know what the cable looks like but it is obd2 on one end and USB on the other. The software is called inpa.

[lukeperformance]

You need INPA cable or BT cable. INPA cable is very cheap on ebay ($20-40). With INPA, you can code your car to have alpina trans etc... BT cable is around 175-200. If you have BT cable, you can add back end flash to stack with JB4.

[batman_e92]

Sounds good , ill get the cable and software since I own a bm trouble U . I also found some used injectors from a 2010 car that Im gonna pick up a couple once I can confirm the issue with my car.

Ill keep updating this post as I go thanks again for the input guys

[Pr335bob]

Np. You'll be fine.

[jmb85]

Originally Posted by 4doorbmwpower

not 100% on this but i think even a used one would have to be coded to YOUR car.

anyone got the 100% affirm on this

You are 100% correct.

Originally Posted by lukeperformance

You need INPA cable or BT cable. INPA cable is very cheap on ebay ($20-40). With INPA, you can code your car to have alpina trans etc... BT cable is around 175-200. If you have BT cable, you can add back end flash to stack with JB4.

I highly suggest you invest and get the INPA cable IF you are computer savvy, the software is free and it's in the coding section. If you are not savvy with computers get the BT cable, very simple GUI.

[TC335]

there is a recall for injectors... depends on your year build 4/07 - 10/07 I believe.. But I've included the campaign in PDF. I had all 6 replaced and only payed for half the cost even though my car didn't fall within the build dates of the recall. I would talk to your local dealer and see if they can help you out any?

[HouseN54]

you need a K=Dcan cable and you have to code the injectors to your car since they all flow diff.