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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Rough Cold Start - Misfires and Fuel Injectors Leaking



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      02-18-2014, 09:11 AM   #1
LI_Goalie
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Rough Cold Start - Misfires and Fuel Injectors Leaking

I assume this is covered under the CPO Warranty? I also assume I should take my JB4 off before I bring it in for repairs? I can't believe how much of a pain in the ass it is to replace fuel injectors on this car. I'd love to do it myself, but between the cost and the programming. F that.
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      02-18-2014, 09:22 AM   #2
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Yeah injectors are covered under the CPO warranty. Some models have a fuel injector recall and even without a warranty it would be covered. Either way, you are covered 100%.

Does your car have the updated HPFP and software? If not, when you get the injectors done you should have that done as well. Fuel issues are well known for our cars but with all the updated stuff the problems are solved. I would make sure before you leave the dealership that all recalls are done so you don't have to go back for fuel related issues in the future.

Definitely take the tune out. It's not worth the chance of them denying the work because of the tune.
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      02-18-2014, 09:31 AM   #3
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Originally Posted by els_86 View Post
Yeah injectors are covered under the CPO warranty. Some models have a fuel injector recall and even without a warranty it would be covered. Either way, you are covered 100%.

Does your car have the updated HPFP and software? If not, when you get the injectors done you should have that done as well. Fuel issues are well known for our cars but with all the updated stuff the problems are solved. I would make sure before you leave the dealership that all recalls are done so you don't have to go back for fuel related issues in the future.

Definitely take the tune out. It's not worth the chance of them denying the work because of the tune.
Thanks, I bought it CPO and don't know if the HPFP was replaced, but I'll ask. Definitely will try to get everything covered in one shot.

I'm a little ticked because right now my DME only has one misfire logged. I was hoping for more misfires so all the injectors get replaced.
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      02-18-2014, 09:50 AM   #4
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What's so hard about the injectors?

They're almost as easy to take out as the spark plugs.
The injector codes are right on the injectors.
INPA and a $25 cable can code injectors.
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      02-18-2014, 09:50 AM   #5
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Originally Posted by Miller335 View Post
What's so hard about the injectors?

They're almost as easy to take out as the spark plugs.
The injector codes are right on the injectors.
INPA and a $25 cable can code injectors.
The fact that they cost hundreds of dollars and you need to code your computer to accept them? Have you ever changed injectors on a normal car?
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      02-19-2014, 11:10 AM   #6
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Originally Posted by LI_Goalie View Post
The fact that they cost hundreds of dollars and you need to code your computer to accept them? Have you ever changed injectors on a normal car?
I've never owned a DI car before this and I'm not happy about the sensitivity of the injectors like you but lets be real here, this type of injector is one of the reasons why the engine is as amazing as it is.

I think a 6 pack of injectors is less than $1k now and it really is the heart of this engine so to speak.
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      02-20-2014, 11:25 AM   #7
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Originally Posted by Miller335 View Post
I've never owned a DI car before this and I'm not happy about the sensitivity of the injectors like you but lets be real here, this type of injector is one of the reasons why the engine is as amazing as it is.

I think a 6 pack of injectors is less than $1k now and it really is the heart of this engine so to speak.
I agree, it was just a kick to the nuts when I looked up how much an aftermarket injector was for this car. Didn't expect it to be that high at all. Sticker shock can be a bitch.
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      02-20-2014, 12:59 PM   #8
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Quote:
Originally Posted by LI_Goalie
Quote:
Originally Posted by Miller335 View Post
I've never owned a DI car before this and I'm not happy about the sensitivity of the injectors like you but lets be real here, this type of injector is one of the reasons why the engine is as amazing as it is.

I think a 6 pack of injectors is less than $1k now and it really is the heart of this engine so to speak.
I agree, it was just a kick to the nuts when I looked up how much an aftermarket injector was for this car. Didn't expect it to be that high at all. Sticker shock can be a bitch.
What aftermarket injectors are you looking at for our n54?
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