auszookers.com • View topic - Force backfire works but then comes back

Board index » Talking About Stuff » Suzuki Talk

Force backfire works but then comes back

Page 1 of 1

[ 11 posts ]

Print view

Previous topic | Next topic

Author

Message

zookz

az supporter

Joined: Wed Mar 30, 2011 2:38 am
Posts: 80
Location: South West
Vehicle: Vitara G16b , Sierra G16b

Posted: Tue Mar 05, 2013 1:51 pm

Gday all, I have a mate with a 87 Sierra that has been extremely temperamental and bloody frustrating. When it plays up it runs rough, kangaroo hops, bogs down, no power, backfires etc etc
But when I do a mexican tune up (2-3) it runs perfect! Until it comes back to the same problem after another small drive.
Have checked fuel pressure (4-5psi)
Changed Coil
Leads
Checked Plugs
Adjusted mixture and idle
Adjusted timing

What can this be? The air filter looks new...?

I also swapped carbys! But could the second carby be faulty 2?

Maybe need a full carby kit?

Cheers

JrZook

Joined: Tue Aug 08, 2006 11:30 pm
Posts: 5517
Location: Holland Park
Vehicle: Awesome!!

Posted: Tue Mar 05, 2013 4:10 pm

zookz wrote:

Maybe need a full carby kit

Sounds like it

Mike57

az supporter

Joined: Fri Jul 22, 2011 11:09 am
Posts: 1009
Location: Melbourne
Vehicle: Suzuki Jimny 2009

Posted: Tue Mar 05, 2013 6:03 pm

The backfiring indicates a timing issue or a sticking valve. I am not an expert but does a Siera have a timing belt or chain. Is the belt slipping. Could there be a sticking valve which could happen if a stem was bent or there was some overheating at some stage.

droverdave

Joined: Wed Dec 19, 2012 7:43 am
Posts: 685
Vehicle: 85 ' Drover

Posted: Wed Mar 06, 2013 7:51 am

what is a mexican tune up.

Bruce

az supporter

Joined: Sun Jun 11, 2006 11:30 pm
Posts: 4003
Location: Brisbane

Posted: Wed Mar 06, 2013 8:08 am

Swapping leads around. EG: putting number 4 lead onto number 1 on the dizzy. Good backyard stuff for fixing a blocked carby in the bush.

_________________
[quote="royce"] I wouldnt mind insulating my rear

atari4x4

az supporter

Joined: Mon Dec 11, 2006 10:30 pm
Posts: 34842
Location: East Radelayed
Vehicle: SV420+SV620 Vitara's

Posted: Wed Mar 06, 2013 8:57 am

very similar to the french tune up, where you rev it up & smother the carby to try & suck the crap through the jets.

_________________
You're just hating because you don't understand

alien

Joined: Wed Mar 24, 2010 10:30 pm
Posts: 16343
Location: Perth
Vehicle: '92 Sierra, 1.6efi, SPOA, 31s.

Posted: Wed Mar 06, 2013 9:11 am

maybe check the auto-choke isnt going... mine did all sorts of weird shit when that happened... i replaced the auto choke twice before dtiching it for a weber with manual choke so it wouldnt happen again, cos its a pain in the ass.

zookz

az supporter

Joined: Wed Mar 30, 2011 2:38 am
Posts: 80
Location: South West
Vehicle: Vitara G16b , Sierra G16b

Posted: Wed Mar 06, 2013 10:44 am

The auto choke has been disconnected by me so it's not that...
Maybe contaminated fuel?
It's just really weird because when I backfire it, it runs so sweet.

Matthew

Joined: Mon Jun 15, 2009 11:30 pm
Posts: 472
Location: S.E. Melbourne
Vehicle: SWB Sierra

Posted: Wed Mar 06, 2013 10:50 am

Have you got a fuel filter between the fuel pump and carby?

atari4x4

az supporter

Joined: Mon Dec 11, 2006 10:30 pm
Posts: 34842
Location: East Radelayed
Vehicle: SV420+SV620 Vitara's

Posted: Wed Mar 06, 2013 10:50 am

could be dirty fuel tank/lines, heaps of people run a 2nd fuel filter just before the carby

EDIT: beaten

_________________
You're just hating because you don't understand

Built4thrashing

Joined: Wed May 21, 2008 11:30 pm
Posts: 4972
Location: Dandenong .Vic
Vehicle: 1999 GV. Locked and Lifted

Posted: Wed Mar 06, 2013 3:28 pm

Check the fuel pump is not stuffed and sucking oil into the fuel.

Blocked PCV Valve.

Crap leads or rotor button

Page 1 of 1

[ 11 posts ]

Board index » Talking About Stuff » Suzuki Talk

Who is online

Users browsing this forum: No registered users and 297 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum