[Montye90]

Hello All, my car has ticked over 82,000 (2007 October E90 335) and I have noticed the idle is quite rough when I start the car.

Right's itself after about 3-5 seconds. I am guessing leaky injector(s) ?

thanks to any help offered. I am sure this has been done to death

[DR-JEKL]

have you done plugs & coils? have you done walnut blast?

[Montye90]

No mate. Wasn't sure what the first steps were...

I noticed FC P E u r o has an ignition service kit.
I am running Stage 2 MHD, would this be the right one to get?
12138616153KT1

Thanks again...

[Montye90]

Going to be in the US next week, so will grab this: 12138616153KT1

If this is wrong, somebody please stop me

[BM3Rrrr]

Originally Posted by Montye90

Going to be in the US next week, so will grab this: 12138616153KT1

If this is wrong, somebody please stop me

That kit will work just fine

[Montye90]

Originally Posted by BM3Rrrr

That kit will work just fine

Thanks mate

[QuadroRC]

Originally Posted by Montye90

Hello All, my car has ticked over 82,000 (2007 October E90 335) and I have noticed the idle is quite rough when I start the car.

Right's itself after about 3-5 seconds. I am guessing leaky injector(s) ?

thanks to any help offered. I am sure this has been done to death

Having the same issue with error code P0172 (bank 1 too rich), engine rough only occurs first start of the day.
Plugs and coils changed, low fuel pressure sensor changed, PCV valve changed and walnut blasted.... all this was preventative maintenance.
Issue still persist. next step will be injectors replaced.
Will keep you updated

[Montye90]

thanks Quadro. I will do Plugs and Coils first. If that doesn't fix it, Injectors. Might even just get them whilst I am in the US.

[BM3Rrrr]

Originally Posted by Montye90

Thanks mate

FYI the factory coils are made by Bosch so once you change out to Delphi you cannot mix & match coils.

I bought PN# 00044X6 for coils $121.99
PN # 0242140507 for plugs $40.14

About the same price but having the Bosch Coils gives me the option that if in future one goes bad I could throw one of the old factory ones back in.

[Montye90]

Ok, good to know, thanks

Apart from compatibility, is there any other technical difference someone would run Delphi over Bosch?

[QuadroRC]

Originally Posted by Montye90

thanks Quadro. I will do Plugs and Coils first. If that doesn't fix it, Injectors. Might even just get them whilst I am in the US.

I doubt that plugs and coils will fix it but it's something you should be doing anyway, it's good for ur stage 2 MHD.
Go straight to replacing injectors and get coded. doesn't matter what index you're getting, making sure you don't mix index 9 (and early) together with index 10 (and later) in 1 same bank

[Montye90]

Originally Posted by QuadroRC

I doubt that plugs and coils will fix it but it's something you should be doing anyway, it's good for ur stage 2 MHD.
Go straight to replacing injectors and get coded. doesn't matter what index you're getting, making sure you don't mix index 9 (and early) together with index 10 (and later) in 1 same bank

Cool, thanks again. Just reading about Eldor Coils now..

[Montye90]

Are these ok for my car? (Index 12) [Need to read what Index means]

13538648937KT

[BM335M]

Mine does it as well, seems common on n54's to idle rough on cold starts even after blast, coils and plugs have been done.
Starts right away but idles rough for the first few seconds.

[QuadroRC]

Originally Posted by Montye90

Are these ok for my car? (Index 12) [Need to read what Index means]

13538648937KT

Indices are just revision numbers. Index 12 is the latest
Picture shown injector with index 11

[Montye90]

Originally Posted by BM335M

Mine does it as well, seems common on n54's to idle rough on cold starts even after blast, coils and plugs have been done.
Starts right away but idles rough for the first few seconds.

yep, that's what its doing. I have had it since 70,000km, just started last week.

[satz]

I know when my injector/s started failing, for weeks I was getting a fuel smell after shut off. Then one day lots of smoke!

[QuadroRC]

Originally Posted by BM335M

Mine does it as well, seems common on n54's to idle rough on cold starts even after blast, coils and plugs have been done.
Starts right away but idles rough for the first few seconds.

Yeah, I know it does harm the car much in a way, but knowing it's there, it's bothering me...

[BM335M]

If the injectors are failing you will get long cranks, black smoke on start up. You can also do a log and check the fuel trims on both banks to diagnose a bad injector.

[Montye90]

Replaced Coils, plugs (NGK gapped), Index 12 injectors and walnut blast (plus a sneaky catch can ) and the start up idle has improved, but still bumpy.

Either way, the car run's so much smoother now on warm idle and in general driving. No break down's at all when I floor it (MHD 2 stage flash). Very happy with it, might have to learn to live with the slightly rough idle.

Was also very impressed with Hills Eurohaus new workshop.

[HawkeyeGeoff]

Originally Posted by Montye90

Replaced Coils, plugs (NGK gapped), Index 12 injectors and walnut blast (plus a sneaky catch can ) and the start up idle has improved, but still bumpy.

Either way, the car run's so much smoother now on warm idle and in general driving. No break down's at all when I floor it (MHD 2 stage flash). Very happy with it, might have to learn to live with the slightly rough idle.

Was also very impressed with Hills Eurohaus new workshop.

Reset all the adapts, bet it'll get even better.

[Montye90]

Originally Posted by HawkeyeGeoff

Reset all the adapts, bet it'll get even better.

K, thanks mate, will do.