Engine revs when brakes applied - Suzuki Forums: Suzuki Forum Site
Suzuki Forum Suzuki Forums

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   Suzuki Forums: Suzuki Forum Site > Suzuki Models > Other Suzuki Models > Suzuki Carry & Every Forum
Register Home Forum Active Topics Photo Gallery Garage Search Today's Posts Mark Forums Read Auto EscrowAuto LoansInsurance Advertise

Suzuki-Forums.com is the premier Suzuki All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 12-16-2014, 10:38 AM   #1 (permalink)
Newbie
 
Join Date: Dec 2014
Posts: 5
Gallery: 0
rumleyfips is on a distinguished road
Default Engine revs when brakes applied

This morning when I went out to steal I mean get a Christmas tree I had a problem I can't figure out with my 1992 Carry pickup.

I started and ran fine, but when I apply the brakes, the engine revs to full throttle. I had to use the handbrake . At first I thought it may be vacuum related, but when I turned the heater fan on the engine reved to full again. This is with my foot off the throttle pedal.

Any suggestions ?

Thanks:

John
rumleyfips is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-17-2014, 09:25 AM   #2 (permalink)
Newbie
 
Join Date: Dec 2014
Posts: 5
Gallery: 0
rumleyfips is on a distinguished road
Default

This morning , I was able to look at the truck. It still puzzles me.

The heater fan switch only revs the engine when turned to high. Since low and medium speeds have no effect on the throttle I can live with that.

I took the brake light fuse out and the problem went away. The problem must be electrical . I don't want to work on wiring in a Nova Scotian winter but I'll have to do something.

Once again, any suggestions where I should look first.

Thanks:

John
rumleyfips is offline   Reply With Quote Quick reply to this message
Old 12-17-2014, 11:06 AM   #3 (permalink)
Moderator
 
Join Date: Mar 2009
Location: Georgetown, Guyana
Posts: 11,952
Gallery: 0
fordem will become famous soon enough
Default

There is an "idle-up" system that increases the engine idle to compensate for the alternator load when there is increased electrical load - this is most likely what's causing your problem.

Unfortunately, since I'm not familiar with the Carry you have (which I suspect is a used JDM import), I have no idea how the idle-up works - on carbureted engines it's usually a vacuum actuated linkage, if it's EFI, it could be either an airbleed, or whatever idle control mechanism the EFI system uses.
__________________
98 - 1.8 Mitsubishi Pajero iO
98 - 2.0 Suzuki Grand Vitara - SQ420
05 - 2.0 Suzuki Grand Vitara - JB420
15 - 2.4 Kia Sportage
fordem is offline   Reply With Quote Quick reply to this message
 
Old 12-17-2014, 11:41 AM   #4 (permalink)
Newbie
 
Join Date: Dec 2014
Posts: 5
Gallery: 0
rumleyfips is on a distinguished road
Default

Fordem: Thanks.

Its a 1992 DD51T with a F6A carbureted engine, imported from Japan Partners..
I just discovered that it revs when the lights are turned on too. This does not happen when I remove the brake light fuse.

It revs to 4000+ ( I shut it off before it revs too high ) so I doubt it's a high idle. I will try to find the control though. Any hints about where it might be or what it looks like. I can't see any solenoids, pots or shafts move when the brake is applied and the engine races.

Right now I think I should look for a bad wire between the brake light switch and the tail-lights.

John
rumleyfips is offline   Reply With Quote Quick reply to this message
Old 12-19-2014, 12:08 PM   #5 (permalink)
Newbie
 
Join Date: Dec 2014
Posts: 5
Gallery: 0
rumleyfips is on a distinguished road
Default

Yesterday I found that taking the vacuum hose off the Fast Idle solenoid on the carb solved the problem of the engine racing when the brakes were applied. Before I did that, I found that turning the lights on made the engine race so I'm still confused as to why this would happen.

Today, I took it for a drive and it only ran at about half throttle. After it warms up it idles high and the throttle pedal does not go all the way to the stop. There's a bit of wet snow today so I'll wait until it's drier to look for that problem.

One thing at a time.

John
rumleyfips is offline   Reply With Quote Quick reply to this message
Old 12-21-2014, 02:11 PM   #6 (permalink)
Newbie
 
Join Date: Dec 2014
Posts: 5
Gallery: 0
rumleyfips is on a distinguished road
Default

Found the problem. There are two levers on the throttle shaft . One for the throttle cable and one for the link to the fast idle solenoid. They were seized together but need to operate independently. After I cleaned them and freed them up the truck worked fine. I reinstalled the vacuum tube and it still works fine.

That doesn't explain the racing engine when the throttle/lights/heater fan were used but hey the truck works.

Thanks:
John
rumleyfips is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Suzuki Forums: Suzuki Forum Site > Suzuki Models > Other Suzuki Models > Suzuki Carry & Every Forum

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Suzuki Forums: Suzuki Forum Site forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 12:04 AM.



Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.