IAC and SEPST - 1130cc.com: The #1 Harley Davidson V-Rod Forum
» Insurance
» Sponsors
Go Back   1130cc.com: The #1 Harley Davidson V-Rod Forum > V-ROD Discussions > V-ROD General
New User? Register - Forgot Password

Reply
 
Thread Tools Display Modes
Old 11-03-2012, 07:32 PM   #1
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
IAC and SEPST

Bike shows all the signs of a dirty IAC. Stalls when hot. If it doesn't quite stall, after a bit the idle picks up and goes back to normal. I really want to finish some other stuff first before I take it off to clean / replace it. In the meantime I just saw a reference to an IAC setting in a tuner (TMAX as it happens - don't have one, don't want one). This stuff started when I switched from my PCIII to a SEPST. Are there any settings in the SEPST map that affect the IAC other than idle speed and fuel?

I'd guess not, but just checking.
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-03-2012, 08:02 PM   #2
Dr Dave
Buy American!
 
Dr Dave's Avatar
 
Join Date: Dec 2007
Location: Jacksonville, FL
Posts: 3,956
Images: 93
Feedback Score: 3 reviews
Before you do that, replace your "System Relay". It's much easier and cheaper (especially if you break the fragile IAC screws that are bonded with Loctite).

Mine was doing the same thing, I thought the same thing. I removed, cleaned, and replaced my IAC with no joy (thank God that I did not break the screws).

I eventually replaced the System Relay to fix it.
__________________
What's in your Avatar?

Ride it like your life depended on it.
Dr Dave is offline   Reply With Quote
Old 11-04-2012, 03:00 AM   #3
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
Hmm. Yes, I had better blitz the electrics.

Still leaves the same question though - I have unwisely used someone else's map as a base. Could they have done anything to mess up the idle other than change the fuel loading or desired idle speed?

Sent from my e1808_v75_jbaol1_5647 using Motorcycle.com App
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Old 11-04-2012, 09:30 AM   #4
Karzza
all or nothing
 
Karzza's Avatar
 
Join Date: Jun 2007
Location: Helsinki, Finland, EU
Posts: 1,230
Images: 2
Feedback Score: 0 reviews
It there a IAC initial calibration after uploading a map needed while using SEPST?
(Ignition on, run-switch 5s on, 5s off, 5s on, 5s off, ignition off)
__________________

300rwhp, E85 fuel
Falicon +3/8" full circle, K1, ceramic CP 4.25" pistons
Billet oil-pan, pinned cases and ceramic bearings, 12mm head and main studs
Jones cams, SuperAlloy valves, titan retainers, springs
Turbo Garret GT2560R, water cooled
16 Psi Forge waste gate and BOV, Valeo i-cooler
Black Ops 172lb/hr injectors, Wabro 255lph pump
Porsche tbo 5bar fuel regulator
Daytona VRFIgen3 ECM, KMS 3bar MAP.
11 plates carbon fibre lock-up, billet basket
Str cut 2nd,
K&M plenum and -brace
Karzza is online now   Reply With Quote
Old 11-04-2012, 01:36 PM   #5
pecee
Registered Full
 
pecee's Avatar
 
Join Date: Mar 2007
Location: new zealand
Posts: 2,019
Feedback Score: 4 reviews
Louis, if you want your bike to run as it should ,you should consider quitting the guess work tuning and buy the new daytona twin tec.
pecee is offline   Reply With Quote
Old 11-04-2012, 03:11 PM   #6
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
I have, and use, the Daytona Twinscan.

Sent from my e1808_v75_jbaol1_5647 using Motorcycle.com App
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Old 11-04-2012, 03:13 PM   #7
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
IAC initial calibration? Not heard of it. I can try that..

Sent from my e1808_v75_jbaol1_5647 using Motorcycle.com App
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Old 11-04-2012, 03:15 PM   #8
Boost
Back in Black
 
Boost's Avatar
 
Join Date: Feb 2006
Location: Greenville SC
Posts: 2,411
Images: 35
Feedback Score: 12 reviews
Quote:
Originally Posted by Karzza View Post
It there a IAC initial calibration after uploading a map needed while using SEPST?
(Ignition on, run-switch 5s on, 5s off, 5s on, 5s off, ignition off)
stupid me just forgot to do this and I think (hope) I just fouled out some plugs.
__________________

My bikes pictures click here
04 b 50 wet nos lowered chromed out slamed
07 dx blacked out, engine redone!
03 European gsxr 1000 over 200 hp sold to buy 08 Buell 1125r
Founder of NightMare's NightRiders!
Boost is offline   Reply With Quote
Old 11-04-2012, 04:05 PM   #9
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
Quote:
Originally Posted by Boost View Post
stupid me just forgot to do this and I think (hope) I just fouled out some plugs.
I've never done this, and can't see it in the manual either...

I'll go look harder.

[edit]

Just searched the help file in the SEPSt, can's find anything about it...
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Old 11-04-2012, 04:19 PM   #10
Boost
Back in Black
 
Boost's Avatar
 
Join Date: Feb 2006
Location: Greenville SC
Posts: 2,411
Images: 35
Feedback Score: 12 reviews
Just do as karzza said (Ignition on, run-switch 5s on, 5s off, 5s on, 5s off, ignition off)
before you start engine. cycle switch and look down tb and see if you can see iac go in and out. I have sprayed with carb cleaner from top. Not sure it ever did anything but thought it could not hurt if it was dirty. maybe more fuel at low rpm? I'll try to look I think there is something to adjust just can not remember what. what is tps at idle?
__________________

My bikes pictures click here
04 b 50 wet nos lowered chromed out slamed
07 dx blacked out, engine redone!
03 European gsxr 1000 over 200 hp sold to buy 08 Buell 1125r
Founder of NightMare's NightRiders!
Boost is offline   Reply With Quote
Old 11-04-2012, 04:57 PM   #11
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
Quote:
Originally Posted by Boost View Post
Just do as karzza said (Ignition on, run-switch 5s on, 5s off, 5s on, 5s off, ignition off)
before you start engine. cycle switch and look down tb and see if you can see iac go in and out. I have sprayed with carb cleaner from top. Not sure it ever did anything but thought it could not hurt if it was dirty. maybe more fuel at low rpm? I'll try to look I think there is something to adjust just can not remember what. what is tps at idle?
OK, it's easy enough! I'll do it! But I'd love to know where it is in the bloody manual, because if I have missed this rather vital sounding step, what heck else have I missed?!

Will do it tomorrow and report back.
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Old 11-04-2012, 07:38 PM   #12
pgilliam1
Registered Full
 
pgilliam1's Avatar
 
Join Date: Jun 2012
Location: St. Louis
Posts: 710
Feedback Score: 1 reviews
If you're going to spray throttle body/carb cleaner into the IAC, make sure the engine is running. The cleaner will be sucked into and through the IAC for a thorough cleaning. Just spraying the cleaner onto the pintle doesn't do very much at all.
pgilliam1 is offline   Reply With Quote
Old 11-04-2012, 08:11 PM   #13
XvtxCrewzr
Crash Bandacoot
 
XvtxCrewzr's Avatar
 
Join Date: Nov 2006
Location: Connecticut
Posts: 1,058
Feedback Score: 0 reviews
Quote:
Originally Posted by Dr Dave View Post
Before you do that, replace your "System Relay". It's much easier and cheaper (especially if you break the fragile IAC screws that are bonded with Loctite).

Mine was doing the same thing, I thought the same thing. I removed, cleaned, and replaced my IAC with no joy (thank God that I did not break the screws).

I eventually replaced the System Relay to fix it.
My '05 B is having those issues,erratic idle..stalls sometimes..cleaned the IAC,and DID break a screw but was able to drill it out and retap with no problems..so System Relay? is there one on a 05?
__________________
'05 VRSCB,Sundowner seat with pillon,chrome side covers,chrome switch housings,chrome fuel cell covers,chrome brake/clutch resevoir covers,chrome engine kit,luggage rack,chrome swingarm,chrome upper/lower belt covers,pivot covers,chrome rear slotted wheel and pully,chrome girly hand levers,kuryakin grips,Avon Cobra's 200mm rear,power commander III with SE slip-ons and SE airfilter,and more chrome
Also a vintage '72 750 Norton Commando,and a Yammi XJ700 Maxim X
Now I'm REALLY
XvtxCrewzr is offline   Reply With Quote
Old 11-05-2012, 03:21 AM   #14
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
Quote:
Originally Posted by XvtxCrewzr View Post
My '05 B is having those issues,erratic idle..stalls sometimes..cleaned the IAC,and DID break a screw but was able to drill it out and retap with no problems..so System Relay? is there one on a 05?
Yes, but it is not just the system relay, it is all the electrical gubbins: grounds would probably be top, followed by battery terminals.

In my own case I will disconnect the Twinscan and re-connect the V-Gauge so I can monitor the voltage.

Sent from my e1808_v75_jbaol1_5647 using Motorcycle.com App
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Old 11-07-2012, 11:17 AM   #15
Louis
Posting From The Pub
 
Louis's Avatar
 
Join Date: Jul 2007
Location: Portugal
Posts: 7,838
Images: 3
Feedback Score: 5 reviews
Quote:
Originally Posted by Louis View Post
OK, it's easy enough! I'll do it! But I'd love to know where it is in the bloody manual, because if I have missed this rather vital sounding step, what heck else have I missed?!

Will do it tomorrow and report back.
Right, it isn't that.

No difference.

I am trying to finish my mapping before I fiddle, so I can get the Twinscan and its acres of wiring off at the same time, and the V-Gauge back on. But I am starting to suspect the fuel pump now or throttle body gasket now - I keep getting lean running under load however much fuel i throw at it.

Oh well, as soon as we get a few sunny days I shall finish the mapping and then tear it down fox fixs and Winter mods.
__________________
Louis

http://www.flickr.com/photos/acam
http://www.thegentlemansnapper.co.uk

Arnotts, D&D, SEPST, custom paint or all chrome according to mood, GRC seat, wave rotors, Muscle wheels, Burleigh bars, V-Gauge, assorted pretty bits.



2007 VRSC-AW (Fun).
2007 KTM 990 Adventure (Off Road and Touring).
2006 Triumph Daytona T955i (Evil).
2009 Fatboy (Heavily Tarted Up Show Pony).
2011 Bonneville (On long term loan).
1978 Triumph Bonneville Based Racer (Needs A Rebuild)
Louis is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 01:22 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Forum Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Honda Vultus Forum HD LiveWire Forum Ninja H2 Forum Ducati Scrambler Forum Kawasaki Ninja 250SL Forum