Poor Idle on Startup, Deeper Sound, Reving Without Twisting Throttle...

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Poor Idle on Startup, Deeper Sound, Reving Without Twisting Throttle...

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CBR Forum >> Current Honda CBR Models >> CBR 600F4i >> Poor Idle on Startup, Deeper Sound, Reving Without Twisting Throttle...

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Poor Idle on Startup, Deeper Sound, Reving Without Twis... - 6/3/2008 3:06:36 PM

Savage Penguin

Posts: 2
Joined: 8/23/2007
Status: offline

Roughly two weeks ago I removed my tank in order to replace the air filter, and install an APE manual CCTL on my 2002 F4i. When doing so, I unknowingly removed one of the hoses. It is a 2" in length hose, connected to a plastic elbow, then connected to a long length of hose running towards the engine [Part 95005-80001-50M on the Fuel Tank Fiche]. I rode to school (20 minute drive). After class, I went to start up the bike, and I noticed it idle'd very low at first, and had a much more bass sounding tone to it. Also at red lights, the idle will blip up from 1300 to 1800, indicated on the tac. Also on startup there seems to be more white smoke than before. I am wondering the following:

What is this hose, could it be responsible for the poor performance, or could it be related to the CCTL?
Has anyone else had this problem (I've searched and found similar symptoms, most seeming to say they are caused by fouled plugs)?
How hard are plugs to replace? Is it something I should do myself?
Is there anything else I can check to diagnose?

Thank you for your time, and yes, I plan to introduce myself in the new members section.

Post #: 1

RE: Poor Idle on Startup, Deeper Sound, Reving Without ... - 6/3/2008 4:52:39 PM

ampfp

Posts: 688
Joined: 9/11/2006
Status: offline

so did you plug the hose back and try?

(in reply to Savage Penguin)

Post #: 2

RE: Poor Idle on Startup, Deeper Sound, Reving Without ... - 6/3/2008 5:09:11 PM

Maniak05

Posts: 53
Joined: 5/24/2008
Status: offline

Throatier sounds, idle surges...these are symptoms of a disconnected vacuum line. Someone correct me if I'm wrong!

What is an "APE manual CCTL"?

(in reply to ampfp)

Post #: 3

RE: Poor Idle on Startup, Deeper Sound, Reving Without ... - 6/3/2008 6:12:57 PM

WOT

Posts: 390
Joined: 3/14/2008
Status: offline

The idle surge is a vacuum leak symptom... just reconnect the line. Check out bikebandit.com and search for your bike to get the schematic.

An "APE manual CCTL" replaces the stock came chain tensioner lifter (CCTL) to stop the rattle everyone has.

< Message edited by WOT -- 6/3/2008 6:21:53 PM >

(in reply to Maniak05)

Post #: 4

RE: Poor Idle on Startup, Deeper Sound, Reving Without ... - 6/3/2008 8:56:53 PM

StreetPower

Posts: 362
Joined: 12/16/2007
From: Ukraine
Status: offline

yep, vacuum leak that is....

(in reply to WOT)

Post #: 5

RE: Poor Idle on Startup, Deeper Sound, Reving Without ... - 6/8/2008 10:43:57 AM

Savage Penguin

Posts: 2
Joined: 8/23/2007
Status: offline

Thank you all for your replies. I traced the vacuum tubes and they all appear to be connected. The tube off the tank that I noted seems to just be the overfill tube, and after I reconnected that the bike still runs poorly. I''ve posted pictures and videos of the issue, you can hear the odd rev''''ing in the videos and the deeper sound. The picture with a red circle in is the area I''''m looking at now. Is there supposed to be just two empty holes there?

Link to Video and Pictures: http://picasaweb.google.com/Luke.SavagePenguin/2002HondaCBRF4i

Thank you again for your time.

< Message edited by Savage Penguin -- 6/8/2008 10:58:46 AM >

(in reply to StreetPower)

Post #: 6

RE: Poor Idle on Startup, Deeper Sound, Reving Without ... - 6/8/2008 2:39:14 PM

Maniak05

Posts: 53
Joined: 5/24/2008
Status: offline

The initial startup with the FI light on is normal. And the "hose that originally came off" looks to be just a drain hose, but I''m not 100% sure.

I''m guessing if you take it in to a shop they''d find the issue fairly quickly, and its probably something small (ie, wouldn''t cost you much).

(in reply to Savage Penguin)

Post #: 7