Idle RPM dip.... video inside. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

CSG Mike · 08-16-2012, 02:03 AM

This is starting to get annoying. It comes and goes, regardless of whether AC or other accessories are on or off, and regardless of whether its hot or cold. ECT must, however, be at full operating temperature; it won't do it while the engine is cold.

Dips at 0:06, 0:27, 0:48, 1:12

[ame="http://www.youtube.com/watch?v=3YSxdI3yifk"]BRZ idle RPM dip... - YouTube[/ame]

I hope it doesn't turn out to be another one of those blown engine stories...

enjoi23 · 08-16-2012, 02:22 AM

had an old car that did that. the alternator was bad..but this is a brand spankin new car so idk..

czar07 · 08-16-2012, 03:07 AM

lol I cant believe you're worried/annoyed about that..

Visconti · 08-16-2012, 05:17 AM

I fix this problem in my STG1 Flash

DaveFTW · 08-16-2012, 07:38 AM

Quote:

Originally Posted by enjoi23

had an old car that did that. the alternator was bad..but this is a brand spankin new car so idk..

same problem as myself.. in my is300

WTF · 08-16-2012, 07:50 AM

Mine's going into toyota tomorrow for this but a lot more severe. It nearly stalls, car shudders, misfires etc :S

Visconti · 08-16-2012, 07:51 AM

Quote:

Originally Posted by WTF

Mine's going into toyota tomorrow for this but a lot more severe. It nearly stalls, car shudders, misfires etc :S

You definitely have a problem

celica73 · 08-16-2012, 07:52 AM

Quote:

Originally Posted by Visconti

I fix this problem in my STG1 Flash

Cool that you can fix it. Can you reverse engineer it and tell us what makes the factory ECU do it?

R8 · 08-16-2012, 07:53 AM

Interesting that the dips are every 19 seconds, like some sort of cycle.

Visconti · 08-16-2012, 07:53 AM

Quote:

Originally Posted by celica73

Cool that you can fix it. Can you reverse engineer it and tell us what makes the factory ECU do it?

Ummmm idle control tables are set too dam low !

boarder1995 · 08-16-2012, 09:05 AM

It's trying to save you fuel. Either that or a misfire in cylinder #5. Mine dips, but I can't say I've seen that type of dip before while just idling.

fenton · 08-16-2012, 09:14 AM

Quote:

Originally Posted by boarder1995

It's trying to save you fuel. Either that or a misfire in cylinder #5. Mine dips, but I can't say I've seen that type of dip before while just idling.

ah the illusive cylinder 5, i still have yet to find it in my h4 :P

Sigh-on-Rice · 08-16-2012, 08:10 PM

Quote:

Originally Posted by czar07

lol I cant believe you're worried/annoyed about that..

I would be worried when someone's problem started with this idle RPM dip and ended up having the engine rebuilt.

Link here

Gen · 08-16-2012, 08:48 PM

Quote:

Originally Posted by Sigh-on-Rice

I would be worried when someone's problem started with this idle RPM dip and ended up having the engine rebuilt.

Link here

I'm curious to why that would result in a rebuild.

For the record, I'd never except a rebuild of an engine this new. I wouldn't even want a new engine. I'd probably bitch until they replaced the car.

08-16-2012, 02:03 AM	#1
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,542 Thanks: 8,931 Thanked 14,189 Times in 6,840 Posts Mentioned: 966 Post(s) Tagged: 14 Thread(s)	Idle RPM dip.... video inside. This is starting to get annoying. It comes and goes, regardless of whether AC or other accessories are on or off, and regardless of whether its hot or cold. ECT must, however, be at full operating temperature; it won't do it while the engine is cold. Dips at 0:06, 0:27, 0:48, 1:12 [ame="http://www.youtube.com/watch?v=3YSxdI3yifk"]BRZ idle RPM dip... - YouTube[/ame] I hope it doesn't turn out to be another one of those blown engine stories...

08-16-2012, 03:07 AM	#3
czar07 Senior Member Join Date: Sep 2011 Drives: '97 RSP JZZ30 GT-T Location: Australia Posts: 612 Thanks: 365 Thanked 192 Times in 101 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	lol I cant believe you're worried/annoyed about that.. __________________ Germans>Japanese>Italians>Americans. Unless its a Corvette.

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08-16-2012, 05:17 AM	#4
Visconti Banned Join Date: Apr 2012 Drives: 05 STi Location: Norwalk, CT Posts: 2,843 Thanks: 196 Thanked 3,188 Times in 1,197 Posts Mentioned: 375 Post(s) Tagged: 2 Thread(s)	I fix this problem in my STG1 Flash

08-16-2012, 07:53 AM	#9
R8 Spinning Triangles Join Date: May 2012 Drives: RX-8 Location: Philadelphia Posts: 141 Thanks: 12 Thanked 48 Times in 28 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Interesting that the dips are every 19 seconds, like some sort of cycle.

08-16-2012, 09:05 AM	#11
boarder1995 Senior Member Join Date: Jun 2012 Drives: 2013 Subie BRZ Limited, black, 6MT Location: Texas Posts: 125 Thanks: 38 Thanked 22 Times in 16 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	It's trying to save you fuel. Either that or a misfire in cylinder #5. Mine dips, but I can't say I've seen that type of dip before while just idling.

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