Very fast idle speed when lights or heater on, normal?

Anything Suzuki related, but not technical, it goes here!
Post Reply
User avatar
SlimGrim
Winching along now
Winching along now
Posts: 510
Joined: Tue Oct 13, 2015 3:39 pm
Location: Norwich Norfolk
Contact:

Very fast idle speed when lights or heater on, normal?

Post by SlimGrim » Sat Oct 22, 2016 10:31 pm

My samurai idle's really nicely and quietly up until I turn on the lights or heater, at which point it starts to idle really rather fast, the fun/scary part is feeling the accelerator go down under my foot as I turn either thing on haha, however it is a Royal pain in the dick when in slow traffic because what would normally be about 6miles an hour in first with my foot off the clutch will instead be more like 10-11mph :| and so I'm constantly jumping between clutch & brake :/ is this normal and just a Suzuki quirk? It is also making my fuel economy absolutely shit eh n in traffic :hahaha:
___________________

1988 SJ413 (JSA) Samurai, SoftTop - White (sometimes)

User avatar
twiss
SCUK Computer Wizard
SCUK Computer Wizard
Posts: 6110
Joined: Mon Nov 08, 2010 2:28 pm
Location: Birkirkara, Malta
Contact:

Re: Very fast idle speed when lights or heater on, normal?

Post by twiss » Sat Oct 22, 2016 11:24 pm

There is an idle up system on the carb that will apply some throttle with electrical load. You could just unplug it though. Not sure which plug it is...
Not the big green one which I think is the fuel shut off solenoid.

It shouldnt rev it up that much, just 200rpm or so I think

My SU doesn't have idle up, and gets along just fine
Twiss

'93 Suzuki Samurai Sport 1.6 16v SU. Virtual lift, spring under, 31s
'93 Maruti Gypsy MG410

"If brute force doesn't fix your problem, you aren't using enough of it."

User avatar
Darrell
Suzuki, will you marry me?
Suzuki, will you marry me?
Posts: 2988
Joined: Wed Feb 23, 2011 7:54 pm
Location: south oxfordshire
Contact:

Re: Very fast idle speed when lights or heater on, normal?

Post by Darrell » Sat Oct 22, 2016 11:59 pm

Doing this screw in should limit the rpm increase.
Attachments
Sj413 idle up.jpg
Sj413 idle up.jpg (203.99 KiB) Viewed 7475 times
2005-GV 1600se, "Hell" What do I know!

User avatar
Darrell
Suzuki, will you marry me?
Suzuki, will you marry me?
Posts: 2988
Joined: Wed Feb 23, 2011 7:54 pm
Location: south oxfordshire
Contact:

Re: Very fast idle speed when lights or heater on, normal?

Post by Darrell » Sun Oct 23, 2016 12:09 am

Or as Twiss says, see how she behaves with it unplugged.
Attachments
nh.jpg
nh.jpg (191.41 KiB) Viewed 7474 times
2005-GV 1600se, "Hell" What do I know!

SherwoodNash
Winching along now
Winching along now
Posts: 731
Joined: Sat Aug 09, 2014 11:05 am

Re: Very fast idle speed when lights or heater on, normal?

Post by SherwoodNash » Sun Oct 23, 2016 8:11 am

Good work Darrell! clear explanation again :thumbup:

User avatar
ROBBIE
I spend far too much time on here
I spend far too much time on here
Posts: 4555
Joined: Tue Sep 09, 2008 6:32 pm
Location: Dorset or stuck

Re: Very fast idle speed when lights or heater on, normal?

Post by ROBBIE » Sun Oct 23, 2016 8:47 am

On my old SJ someone had put a switch in to turn the idle up on and off :S
Sid James gone but never forgotten
Jimny 1.6 not as good as an SJ but still good

User avatar
SlimGrim
Winching along now
Winching along now
Posts: 510
Joined: Tue Oct 13, 2015 3:39 pm
Location: Norwich Norfolk
Contact:

Re: Very fast idle speed when lights or heater on, normal?

Post by SlimGrim » Sun Oct 23, 2016 10:10 am

Fantastic! Thanks guys really clear explanation :) will try both things later!
___________________

1988 SJ413 (JSA) Samurai, SoftTop - White (sometimes)

Post Reply