Silvia Club of NSW

Why drive when you can drift?
It is currently Sat Apr 27, 2024 5:10 pm

View unanswered posts | View active topics


Board index » Cars » 180sx

All times are UTC + 10 hours [ DST ]



Post new topic Reply to topic  Page 1 of 2
  [ 16 posts ]  Go to page 1, 2  Next
  Print view Previous topic | Next topic 
Author Message
scuba8085
 Post subject: Backfire on my 180SX
PostPosted: Mon May 29, 2006 4:12 am 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
Hi guys...

REcently i have encounter backfiring on my 180sx.

While on first gear trying to change to second gear at about 2.5k rpm... you will hear a backfire sound. This will not happen in higher gears...

Is this prob due to the the car is too rich in fuel?

What could be the prob?

Any advise?

Rdgs

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
ZEi250t
 Post subject:
PostPosted: Mon May 29, 2006 10:14 am 
Offline
Moderator
Moderator
User avatar

Joined: Mon Feb 03, 2003 10:19 pm
Posts: 16498
Car: Skoda Octavia RS
Real Name: Iain
your external BOV is probably leaking, OR you have a leak somewhere in the system. i suggest you test and clean your BOV, and/or check all your piping, if you have made any changes to anything, double check all your work.

_________________
M35 Stagea.info @ http://www.m35stagea.info/
Top
 Profile  
Reply with quote  
karbonphyber
 Post subject:
PostPosted: Mon May 29, 2006 8:56 pm 
Offline
T03 Hybrid
User avatar

Joined: Fri Jul 02, 2004 12:47 pm
Posts: 188
Location: Newcastle, NSW
Car: Karbon Industries 180SX
hi dan,

have you recently changed your fuel pump? any changes?

cheers

leonard

_________________
My 180SX Site
Top
 Profile  
Reply with quote  
scuba8085
 Post subject:
PostPosted: Tue May 30, 2006 2:54 am 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
Will BOV cause backfire?

Well, as for the piping... i don't think i have modified anything...

ZEi20T wrote:
your external BOV is probably leaking, OR you have a leak somewhere in the system. i suggest you test and clean your BOV, and/or check all your piping, if you have made any changes to anything, double check all your work.

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
scuba8085
 Post subject:
PostPosted: Tue May 30, 2006 2:57 am 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
i have change my fuel pump quite sometimes back...

after changing... nothing of this backfire happens...
only until recently... that i have this problem...

This backfire only happen during 1st to 2nd gear changed at low rpm...
it doesn't happen at high gears or high rpm...

i believe the fuel is too rich that causes this backfire?
anyway, there is not pull back...



karbonphyber wrote:
hi dan,

have you recently changed your fuel pump? any changes?

cheers

leonard

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
karbonphyber
 Post subject:
PostPosted: Wed May 31, 2006 12:45 pm 
Offline
T03 Hybrid
User avatar

Joined: Fri Jul 02, 2004 12:47 pm
Posts: 188
Location: Newcastle, NSW
Car: Karbon Industries 180SX
BOV is also considered part of the intercooler piping in the vehicle. assuming the bov activates the air that was reported to the computer as present will be purged into the atmos IF you purge it to atmos and it'll result in overfueling which results in it being dumped out.

if you had routed the bov back into the piping, thats a whole new issue.

_________________
My 180SX Site
Top
 Profile  
Reply with quote  
scuba8085
 Post subject:
PostPosted: Wed May 31, 2006 1:41 pm 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
Anyway, just to check.

Does the O2 sensor create this prob?
I took out my 02 sensor

karbonphyber wrote:
BOV is also considered part of the intercooler piping in the vehicle. assuming the bov activates the air that was reported to the computer as present will be purged into the atmos IF you purge it to atmos and it'll result in overfueling which results in it being dumped out.

if you had routed the bov back into the piping, thats a whole new issue.

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
karbonphyber
 Post subject:
PostPosted: Wed May 31, 2006 4:21 pm 
Offline
T03 Hybrid
User avatar

Joined: Fri Jul 02, 2004 12:47 pm
Posts: 188
Location: Newcastle, NSW
Car: Karbon Industries 180SX
yups, i believe it might.

removing the O2 sensor removes the signal to let the ECU adjust the fuel input when it's not WOT.

so it'll always run rich just to be safe. could explain the popping.

_________________
My 180SX Site
Top
 Profile  
Reply with quote  
scuba8085
 Post subject:
PostPosted: Wed May 31, 2006 6:56 pm 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
But before that I didn't have any of this prob

karbonphyber wrote:
yups, i believe it might.

removing the O2 sensor removes the signal to let the ECU adjust the fuel input when it's not WOT.

so it'll always run rich just to be safe. could explain the popping.

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
JayS14
 Post subject:
PostPosted: Wed May 31, 2006 8:03 pm 
Offline
Quad T78
User avatar

Joined: Wed Sep 21, 2005 9:43 pm
Posts: 3124
Location: Sydeny
Car: S14a
scuba8085 wrote:
But before that I didn't have any of this prob

Are you sayin before you removed the 02 sensor it was fine then you removed it and the problem started?

If so put the f**ken 02 senser back in :D

Why did you remove it any way?

_________________
Disclaimer: If you have'nt worked it out by now I CANT SPELL FOR SHIT.
Image
Top
 Profile  
Reply with quote  
scuba8085
 Post subject:
PostPosted: Wed May 31, 2006 8:13 pm 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
No...

when i got the car the 02 sensor is already removed...
and it was fine...

but the backfire comes out of a sudden...

so in other words... i am not sure if the prob is created by the 02 sensor...
cause i have never touch the o2 sensor before...

:P

JayS14 wrote:
scuba8085 wrote:
But before that I didn't have any of this prob

Are you sayin before you removed the 02 sensor it was fine then you removed it and the problem started?

If so put the f**ken 02 senser back in :D

Why did you remove it any way?

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
karbonphyber
 Post subject:
PostPosted: Thu Jun 01, 2006 1:26 am 
Offline
T03 Hybrid
User avatar

Joined: Fri Jul 02, 2004 12:47 pm
Posts: 188
Location: Newcastle, NSW
Car: Karbon Industries 180SX
Jay : hahahahah........ that's gold mate.

scuba : if you're not running a mapped ECU, you could try resetting your ECU to reset the fuel trims then follow the usual procedure of letting the ECU learn about the car again.

_________________
My 180SX Site
Top
 Profile  
Reply with quote  
scuba8085
 Post subject:
PostPosted: Thu Jun 01, 2006 5:00 am 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
I have already tried resetting the ECU...

still doesn't work...

karbonphyber wrote:
Jay : hahahahah........ that's gold mate.

scuba : if you're not running a mapped ECU, you could try resetting your ECU to reset the fuel trims then follow the usual procedure of letting the ECU learn about the car again.

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
karbonphyber
 Post subject:
PostPosted: Thu Jun 01, 2006 11:28 am 
Offline
T03 Hybrid
User avatar

Joined: Fri Jul 02, 2004 12:47 pm
Posts: 188
Location: Newcastle, NSW
Car: Karbon Industries 180SX
so..... do you recall what you installed that started this popping at 2.5k?

assuming u have

atmo bov
fmic
stock injectors
upgraded fuel pump
no fuel pressure reg

does your engine exhibit any oil leaks?

_________________
My 180SX Site
Top
 Profile  
Reply with quote  
scuba8085
 Post subject:
PostPosted: Fri Jun 02, 2006 12:17 am 
Offline
T03
User avatar

Joined: Mon Jan 17, 2005 2:56 pm
Posts: 100
Car: 180sx
i really don't know...

maybe faulty ECU?
that i have not try yet...

Will try to check one by one...
Lots of troubleshooting work...

karbonphyber wrote:
so..... do you recall what you installed that started this popping at 2.5k?

assuming u have

atmo bov
fmic
stock injectors
upgraded fuel pump
no fuel pressure reg

does your engine exhibit any oil leaks?

_________________
Believe in yourself and Others will too...
Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 2
  [ 16 posts ]  Go to page 1, 2  Next

Board index » Cars » 180sx

All times are UTC + 10 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 58 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

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group