Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Uneven idle

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Uneven idle

Post by mcbutler » Fri Nov 03, 2017 1:18 pm

And, this morning the engine fault light went out on its own!

Is that normal, still shows on the start up lamp checks, so led/bulb is ok.
Mark
Plymouth
E89
35i
Carmine Red
Black leather

User avatar
ph001
Lifer
Lifer
Posts: 3870
Joined: Mon Oct 31, 2016 5:53 pm
Location: N. Yorkshire.

Uneven idle

Post by ph001 » Fri Nov 03, 2017 3:06 pm

Sure - if the solenoids are gummed up it could well just be sticky. Take them out and give them a good squirt with carb cleaner before you think about ordering new ones. Feel like I'm repeating myself a bit here.
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual - gone but not forgotten.

Image

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Uneven idle

Post by mcbutler » Mon Nov 06, 2017 11:16 am

Its going in Friday morning for diagnostics, I have an aftermarket warranty so hoping to get new solenoids as opposed to cleaning them.

I did not know that the engine fault light could turn itself off, never known that in a car before..
Mark
Plymouth
E89
35i
Carmine Red
Black leather

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Uneven idle

Post by mcbutler » Fri Nov 10, 2017 6:58 pm

Had it down to RL motors this morning, they swapped the vanos over. If the problem m oves with the solenoid then all is fine. If not it is either a problem in the timing chain setup or the vanos hubs which apparently is not that rare.
The inlet cam vanos hub is repairable, the exhaust hub is cast into the head so a damaged hub means a new head - GULP.....
So lets see what the next fault code says...
Mark
Plymouth
E89
35i
Carmine Red
Black leather

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Uneven idle

Post by mcbutler » Thu Nov 16, 2017 6:04 pm

They have been swapped over and the problem has disappeared completely!
Still got a ticking on the tip of the motor, clogged up lifter I think..
Mark
Plymouth
E89
35i
Carmine Red
Black leather

Post Reply