Another noise thread...engine ping/idle dip?

MSpeedAddict · Mon, Apr-23-2012, 06:15:18 PM

So this only has happened to me twice (two separate drives), both times in the last two months.

Basically at idle I'll get a ping ping followed by an idle dip, then repeat. If I gently touch the throttle and keep the RPM at 1-1.1k rpms it completely stops, and car drives perfectly otherwise.

It's only happened after the car has been fully warmed up, and usually after Around a 1/2 hour drive.

No codes being thrown, and I'll have access to DIS, etc this week when my cable comes in.

Any thoughts on what I should check?

It's rather intermittent when it's happening and has only happened twice during two drives. I tried to get my phone out to record it but didn't get anything useful.

Also - MIGHT have a vacuum leak, because occasionally the idle oscillates.
That said, I did have a full smoke test with all leak fixed at the end of last summer.

Edit: oil level is 1/16" below full line

MSpeedAddict · Mon, Apr-23-2012, 11:47:54 PM

Anyone?

MSpeedAddict · Tue, Apr-24-2012, 05:01:06 PM

Well...TTT

Foo2rama · Tue, Apr-24-2012, 06:06:16 PM

winter-summer gas switch? Or bad gas?

dirty maf or air filter?

MSpeedAddict · Tue, Apr-24-2012, 06:20:11 PM

Quote:

Originally Posted by Foo2rama

winter-summer gas switch? Or bad gas?

dirty maf or air filter?

What is winter-summer gas switch?
I'm not familiar with this.

Bad gas, slight possibility, both times I went to a Turkey Hill, although different stations.

I'm alpha-N, and air filter is new last summer.

Thanks for the suggestions, any more keep em coming

MSpeedAddict · Wed, Apr-25-2012, 05:30:50 PM

TTT....

fatcat · Wed, Apr-25-2012, 06:43:08 PM

I had this problem, changed plugs and problem solved.

MSpeedAddict · Wed, Apr-25-2012, 06:46:53 PM

Quote:

Originally Posted by fatcat

I had this problem, changed plugs and problem solved.

Really?!
I'm definitely going to check my plugs, thanks!

We're they obviously visually bad? Or did you just change them

fatcat · Thu, Apr-26-2012, 12:57:18 AM

They were worn, 56k miles on original plugs. Car ran smoother and faster!

MSpeedAddict · Thu, Apr-26-2012, 02:35:23 AM

Cool, I called Active and ordered IXU27 (NGK DCPR9EIX) just have to gap them to .023.
Thanks! I hope it works.

Mon, Apr-23-2012, 06:15:18 PM	#1
MSpeedAddict lol stock Join Date: Dec 2010 Posts: 2,812 In the garage: '02 BMW M3 Reputation: 0 Location: 187MPH	Another noise thread...engine ping/idle dip? So this only has happened to me twice (two separate drives), both times in the last two months. Basically at idle I'll get a ping ping followed by an idle dip, then repeat. If I gently touch the throttle and keep the RPM at 1-1.1k rpms it completely stops, and car drives perfectly otherwise. It's only happened after the car has been fully warmed up, and usually after Around a 1/2 hour drive. No codes being thrown, and I'll have access to DIS, etc this week when my cable comes in. Any thoughts on what I should check? It's rather intermittent when it's happening and has only happened twice during two drives. I tried to get my phone out to record it but didn't get anything useful. Also - MIGHT have a vacuum leak, because occasionally the idle oscillates. That said, I did have a full smoke test with all leak fixed at the end of last summer. Edit: oil level is 1/16" below full line __________________ Active Autowerkes Stage 3.5 IR/IR 2002 e46 M3 Custom Android Head Unit Last edited by MSpeedAddict; Mon, Apr-23-2012 at 07:13:29 PM.

Mon, Apr-23-2012, 11:47:54 PM	#2
MSpeedAddict lol stock Join Date: Dec 2010 Posts: 2,812 In the garage: '02 BMW M3 Reputation: 0 Location: 187MPH	Re: Another noise thread...engine ping/idle dip? Anyone? __________________ Active Autowerkes Stage 3.5 IR/IR 2002 e46 M3 Custom Android Head Unit

Tue, Apr-24-2012, 05:01:06 PM	#3
MSpeedAddict lol stock Join Date: Dec 2010 Posts: 2,812 In the garage: '02 BMW M3 Reputation: 0 Location: 187MPH	Re: Another noise thread...engine ping/idle dip? Well...TTT __________________ Active Autowerkes Stage 3.5 IR/IR 2002 e46 M3 Custom Android Head Unit

Tue, Apr-24-2012, 06:06:16 PM	#4
Foo2rama 2004 E46 M3 Join Date: Oct 2007 Age: 36 Posts: 4,248 In the garage: '04 BMW M3 Reputation: 0 Location: Costa Mesa	Re: Another noise thread...engine ping/idle dip? winter-summer gas switch? Or bad gas? dirty maf or air filter? __________________ __________________ 2004 Mystic Blau Imola Rot ///M3 Coupe SMG Other Rides 73- 240z - L28 Block w e31 heads - prepping as a track toy 95- Legend Coupe - C32A5 block - totaled while parked 96- Dodge Ram 4x4 5.9 - totaled while parked in a seperate incident

Wed, Apr-25-2012, 05:30:50 PM	#6
MSpeedAddict lol stock Join Date: Dec 2010 Posts: 2,812 In the garage: '02 BMW M3 Reputation: 0 Location: 187MPH	TTT.... __________________ Active Autowerkes Stage 3.5 IR/IR 2002 e46 M3 Custom Android Head Unit

Wed, Apr-25-2012, 06:43:08 PM	#7
fatcat Registered User Join Date: Oct 2007 Posts: 9 Reputation: 0	Re: Another noise thread...engine ping/idle dip? I had this problem, changed plugs and problem solved.

Thu, Apr-26-2012, 12:57:18 AM	#9
fatcat Registered User Join Date: Oct 2007 Posts: 9 Reputation: 0	Re: Another noise thread...engine ping/idle dip? They were worn, 56k miles on original plugs. Car ran smoother and faster!

Thu, Apr-26-2012, 02:35:23 AM	#10
MSpeedAddict lol stock Join Date: Dec 2010 Posts: 2,812 In the garage: '02 BMW M3 Reputation: 0 Location: 187MPH	Re: Another noise thread...engine ping/idle dip? Cool, I called Active and ordered IXU27 (NGK DCPR9EIX) just have to gap them to .023. Thanks! I hope it works. __________________ Active Autowerkes Stage 3.5 IR/IR 2002 e46 M3 Custom Android Head Unit

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