Car won't start after throttle actuator replacement?

Hakaj · 07-23-2017, 01:21 PM

So I just replaced one of my throttle actuators (diy) on my e90 m3 and I'm not sure wtf is going on..car drove perfectly when I drove it for a couple of miles after i replaced the actuator. I then parked the car for 20 mins then restarted it to a rough idle, rpm would go from 500 to 1000, then back to 500.

After I got home I noticed that I didn't properly install the intake plenum. Not sure if this is what caused this mess..

I pulled these codes today after starting it up

Filmed a cold start this morning--》

PACarGuy · 08-01-2017, 02:43 PM

Hmm...perhaps a vacuum leak perhaps due to improperly seated plenum?

tdott · 08-01-2017, 02:50 PM

Check your work.

corrupt23jj · 08-02-2017, 09:29 PM

Your title says it won't start, but you describe rough idling?

First, as mentioned I'd suggest to retrace your steps and confirm all electrical connectors are seated properly

Hakaj · 08-03-2017, 12:47 PM

Soooooooooo my mechanic found a napkin in the idle control valve which caused this bullshit... What the fuck. I didn't mess with the ICV while changing my actuator so i have no idea how the hell that happened....

Car runs great now, $500 for 5 hours of labor down the shitter

Hakaj · 08-03-2017, 12:51 PM

Quote:

Originally Posted by corrupt23jj

Your title says it won't start, but you describe rough idling?

First, as mentioned I'd suggest to retrace your steps and confirm all electrical connectors are seated properly

At first the car would not start however i noticed that after letting the car sit for a while (5+ hours) The car would start with a very, very rough idle.

tdott · 08-03-2017, 01:33 PM

Quote:

Originally Posted by Hakaj

Soooooooooo my mechanic found a napkin in the idle control valve which caused this bullshit... What the fuck. I didn't mess with the ICV while changing my actuator so i have no idea how the hell that happened....

Car runs great now, $500 for 5 hours of labor down the shitter

Did you have napkins around when you were working on the car?

corrupt23jj · 08-08-2017, 01:21 AM

I'm perplexed as to how that could have happened. When replacing the TVA I was able to lift most of the wiring harness and saw where the ICV sat, but I thought it was a closed system except for the tubing that connects to the plenum? Anyway, at least you got it fixed!

07-23-2017, 01:21 PM	#1
Hakaj Private 1 Rep 57 Posts Drives: E90 M3 SSII 6MT Join Date: Oct 2015 Location: New York iTrader: (0)	Car won't start after throttle actuator replacement? So I just replaced one of my throttle actuators (diy) on my e90 m3 and I'm not sure wtf is going on..car drove perfectly when I drove it for a couple of miles after i replaced the actuator. I then parked the car for 20 mins then restarted it to a rough idle, rpm would go from 500 to 1000, then back to 500. After I got home I noticed that I didn't properly install the intake plenum. Not sure if this is what caused this mess.. I pulled these codes today after starting it up Filmed a cold start this morning--》 Last edited by Hakaj; 07-26-2017 at 03:41 PM..
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08-01-2017, 02:43 PM	#2
PACarGuy Captain 679 Rep 973 Posts Drives: 2012 E92 M3 DCT ZCP Join Date: Nov 2015 Location: Philly burbs, PA iTrader: (1) Garage List 2012 E92 M3 [8.33] 2019 G01 X3 (wife's) [0.00]	Hmm...perhaps a vacuum leak perhaps due to improperly seated plenum? __________________ 2012 E92 M3 \| ZCP \| DCT \| Space Grey Metallic \| Black Novillo \| BE/ARP \| MPE V2 \| AA green filter \|BMW CF Rear Spoiler, RW Carbon Diffuser, CF Front Splitters \| DTEC 160W Angel Eyes
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08-01-2017, 02:50 PM	#3
tdott Brigadier General 3941 Rep 3,988 Posts Drives: M3 Join Date: Nov 2010 Location: South FL / 6ix iTrader: (4)	Check your work.
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08-02-2017, 09:29 PM	#4
corrupt23jj Private First Class 3 Rep 136 Posts Drives: E92 M3 Join Date: Jun 2008 Location: Porn Valley iTrader: (0)	Your title says it won't start, but you describe rough idling? First, as mentioned I'd suggest to retrace your steps and confirm all electrical connectors are seated properly __________________
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08-03-2017, 12:47 PM	#5
Hakaj Private 1 Rep 57 Posts Drives: E90 M3 SSII 6MT Join Date: Oct 2015 Location: New York iTrader: (0)	Soooooooooo my mechanic found a napkin in the idle control valve which caused this bullshit... What the fuck. I didn't mess with the ICV while changing my actuator so i have no idea how the hell that happened.... Car runs great now, $500 for 5 hours of labor down the shitter Last edited by Hakaj; 08-03-2017 at 01:07 PM..
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08-08-2017, 01:21 AM	#8
corrupt23jj Private First Class 3 Rep 136 Posts Drives: E92 M3 Join Date: Jun 2008 Location: Porn Valley iTrader: (0)	I'm perplexed as to how that could have happened. When replacing the TVA I was able to lift most of the wiring harness and saw where the ICV sat, but I thought it was a closed system except for the tubing that connects to the plenum? Anyway, at least you got it fixed! __________________
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