Welcome to the North American Subaru Impreza Owners Club Monday July 28, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Miscellaneous > Off-Topic

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 10-06-2012, 08:20 PM   #51
VpointVick
Scooby Specialist
 
Member#: 93193
Join Date: Aug 2005
Chapter/Region: South East
Location: Charlotte
Vehicle:
'90 Ishtbox Corolla
maroon, as in, I hope not

Default

Quote:
Originally Posted by UKscooby View Post
Hmm that gas has been in there for years with stabil added. However the boat has been doing this for a lot longer than the age of that gas. It was given to me because of this issue.

Haven't checked the difference honestly as I only got to run it for about 15 minutes. I do know that a 1/4 turn will now make a difference whereas before it was a good turn before I could detect a change. Starting is much easier too.
Change your fuel, but I'm also starting to wonder about the possibility of an intake leak. If you have to go almost full rich on your idle screw to get it to run, then you could still not be getting enough fuel to it under tip in even with the accelerator pump working.
* Registered users of the site do not see these ads.
VpointVick is online now   Reply With Quote
Old 10-06-2012, 08:35 PM   #52
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

Idle screws in = rich? It runs rough if they are all the way in.
UKscooby is online now   Reply With Quote
Old 10-06-2012, 08:37 PM   #53
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

I have some starter fluid which I can use to check for leaks.
UKscooby is online now   Reply With Quote
Old 10-06-2012, 09:03 PM   #54
VpointVick
Scooby Specialist
 
Member#: 93193
Join Date: Aug 2005
Chapter/Region: South East
Location: Charlotte
Vehicle:
'90 Ishtbox Corolla
maroon, as in, I hope not

Default

Quote:
Originally Posted by UKscooby View Post
Idle screws in = rich? It runs rough if they are all the way in.
The screws control fuel flow, so, turning them in leans it out.
VpointVick is online now   Reply With Quote
Old 10-06-2012, 09:17 PM   #55
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

Spec says anywhere from 2 to 7 turns with a turn difference between screws. Its easily within spec and is probably 3.5 turns out each.
UKscooby is online now   Reply With Quote
Old 10-06-2012, 09:23 PM   #56
VpointVick
Scooby Specialist
 
Member#: 93193
Join Date: Aug 2005
Chapter/Region: South East
Location: Charlotte
Vehicle:
'90 Ishtbox Corolla
maroon, as in, I hope not

Default

This has some tips about using a combo square to make some of the static adjustments.

Do the rebuild kits still come with the useless plastic square and the measurement charts that nobody ever bothers with?
VpointVick is online now   Reply With Quote
Old 10-06-2012, 09:33 PM   #57
hkerekes
Scooby Specialist
 
Member#: 66310
Join Date: Jul 2004
Chapter/Region: South East
Location: Removing passenger seat
Vehicle:
2012 Orange

Default

Have you checked fuel pressure and or the ignition system?

Low fuel pressure = leansauce

It still will run but just like **** and it might squirt some but not enough.

A worn cap / rotor will also make it run crappy.
hkerekes is offline   Reply With Quote
Old 10-06-2012, 09:38 PM   #58
VpointVick
Scooby Specialist
 
Member#: 93193
Join Date: Aug 2005
Chapter/Region: South East
Location: Charlotte
Vehicle:
'90 Ishtbox Corolla
maroon, as in, I hope not

Default

Quote:
Originally Posted by hkerekes View Post
Have you checked fuel pressure and or the ignition system?

Low fuel pressure = leansauce

It still will run but just like **** and it might squirt some but not enough.

A worn cap / rotor will also make it run crappy.
I agree that it'd be a good idea to check fuel pressure, but the backfire at tip in is pretty telling of a lean out. He says that it'll run strong on top if he gets it there gradually, so I doubt the ignition system's the culprit.
VpointVick is online now   Reply With Quote
Old 10-06-2012, 11:46 PM   #59
Matt K
NASIOC Supporter
 
Member#: 45204
Join Date: Oct 2003
Chapter/Region: NESIC
Location: you are so complex
Vehicle:
16 you don't
respond to danger

Default

It might not be the issue, but trying to diagnose and tune a carb on old gas is bad juju. Put fresh gas in it even if you don't thi.k thats the problem. I like to drain the tank and put the old gas in my fiancee's car, since modern fi engines rarely give a ****.

It still sounds like its lean on tip in. 2 things i might try (although they are sort of bandaid fixes) would.be backing the screws out a turn or 2, and/or raising the float in the primary bowl. Both will ricken up the mixture a bit (the screws at idle and the float across the board), maybe enough to get by.

Might also take apart and clean the pump again, and the sqirter nozzle. Sometimes when amateurs like us rebuild a carb we knock gunk loose from one place.and it gets.stuck in a new place...
Matt K is offline   Reply With Quote
Old 10-06-2012, 11:50 PM   #60
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

Brand new cap, rotor, condenser, wires, plugs and coil. I haven't checked fuel pressure but it will run up to wot if you take about 5+ seconds to do it. If you "floor it" at anything above 3000ish rpms it does not bog, hesitate or shoot flames.

If it stops raining tomorrow I'll see.if I can take some video.
UKscooby is online now   Reply With Quote
Old 10-06-2012, 11:54 PM   #61
noise boy
Scooby Newbie
 
Member#: 190706
Join Date: Oct 2008
Location: Baltimore, MD
Vehicle:
2004 WRX Wagon
Black

Default

Might need a bigger squirter for the accelerator pump, if you can do the 3000rpm and up mash it you are already through the pump stroke at that point and solidly in the secondaries.
noise boy is offline   Reply With Quote
Old 10-06-2012, 11:57 PM   #62
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

I hear you Matt. In all honesty this thing looked very very good inside. No dirt and very minimal scale buildup in the bottom of the float chamber. I cleaned everything out with carb cleaner and then blew it out with 120psi shop air.

I still do not like the pump operation. I was playing with it again and it doesn't do anything until the throttle has been moved about 25%. It should start as soon as the throttle is moved. I took it all apart and confirmed measurements are correct per that crappy square and the table only I look at. It is an improvement but in no way is it a solid instant instantaneous squirt.
UKscooby is online now   Reply With Quote
Old 10-07-2012, 12:00 AM   #63
hkerekes
Scooby Specialist
 
Member#: 66310
Join Date: Jul 2004
Chapter/Region: South East
Location: Removing passenger seat
Vehicle:
2012 Orange

Default

I agree that its also likely a vacuum issue now or the carb itself has issues that a rebuild cant fix.

Last edited by hkerekes; 10-07-2012 at 12:08 AM.
hkerekes is offline   Reply With Quote
Old 10-07-2012, 12:06 AM   #64
hkerekes
Scooby Specialist
 
Member#: 66310
Join Date: Jul 2004
Chapter/Region: South East
Location: Removing passenger seat
Vehicle:
2012 Orange

Default

Quote:
Originally Posted by UKscooby View Post
I hear you Matt. In all honesty this thing looked very very good inside. No dirt and very minimal scale buildup in the bottom of the float chamber. I cleaned everything out with carb cleaner and then blew it out with 120psi shop air.

I still do not like the pump operation. I was playing with it again and it doesn't do anything until the throttle has been moved about 25%. It should start as soon as the throttle is moved. I took it all apart and confirmed measurements are correct per that crappy square and the table only I look at. It is an improvement but in no way is it a solid instant instantaneous squirt.
hkerekes is offline   Reply With Quote
Old 10-07-2012, 12:28 AM   #65
VpointVick
Scooby Specialist
 
Member#: 93193
Join Date: Aug 2005
Chapter/Region: South East
Location: Charlotte
Vehicle:
'90 Ishtbox Corolla
maroon, as in, I hope not

Default

Quote:
Originally Posted by noise boy View Post
Might need a bigger squirter for the accelerator pump, if you can do the 3000rpm and up mash it you are already through the pump stroke at that point and solidly in the secondaries.
Good advice if it was a Holley 4bbl, but it's a Rochester 2bbl we're talking about.
VpointVick is online now   Reply With Quote
Old 10-07-2012, 12:27 PM   #66
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

Crap video close up of the carb. Its in portrait and has a piece of paper tape flapping in the way but it does have flame. You're seeing the choke flap moving.

So, new issues this morning. After a very cold wet night (34 deg F) it started rough this morning and idled for crap. It ran best with both needles turned in full and there are fuel drips from each venturi. I can also see that the accelerator jets are working terribly again.

I'll get better video in a bit when my phone has charged up some more.

UKscooby is online now   Reply With Quote
Old 10-07-2012, 01:15 PM   #67
hooziewhatsit
Scooby Newbie
 
Member#: 143938
Join Date: Mar 2007
Chapter/Region: NWIC
Location: State of Jefferson
Default

Quote:
Originally Posted by UKscooby View Post
So, new issues this morning. After a very cold wet night (34 deg F) it started rough this morning and idled for crap. It ran best with both needles turned in full and there are fuel drips from each venturi. I can also see that the accelerator jets are working terribly again.
What's your fuel pressure? Dripping usually means the needle valves aren't shutting completely (crap in the way), or to much fuel pressure. If you pinch off the fuel line do they stop dripping?
hooziewhatsit is offline   Reply With Quote
Old 10-07-2012, 01:32 PM   #68
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

If they were dripping it'd be running rich and the bogging would be less, right?
I don't know the pressure. I'm guessing its more to do with the needles not seating right.

More video:

http://static.photobucket.com/player...007_131132.mp4

http://static.photobucket.com/player...007_125748.mp4

Last edited by UKscooby; 10-07-2012 at 01:39 PM.
UKscooby is online now   Reply With Quote
Old 10-07-2012, 03:55 PM   #69
Matt K
NASIOC Supporter
 
Member#: 45204
Join Date: Oct 2003
Chapter/Region: NESIC
Location: you are so complex
Vehicle:
16 you don't
respond to danger

Default

i can make my holey drip fuel by raising the floats to high...

if you're not getting fuel from the pump till 1/4 throttle, then that is still probably the problem. You should get fuel almost the instant you breathe on the throttle.

How big a motor and carb are we talking about? My holley 650cfm carb on a ford 351 appears to shoot a good deal more fuel than that (of course that's just based on eyeballing your videos)

If you disconnect the pump from the linkage, can you actuate it manually?

Last edited by Matt K; 10-07-2012 at 04:01 PM.
Matt K is offline   Reply With Quote
Old 10-07-2012, 04:42 PM   #70
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

I rebuilt the pump and had it running perfectly for about 5 minutes. Super excited until I looked down at the temp gauge and saw 160 instead of 120. It was then I realized I forgot to turn the hose pipe on. I killed the impeller. Supposedly this ez load trailer is worth about $800. Any takers? Comes with free boat.
UKscooby is online now   Reply With Quote
Old 10-07-2012, 06:02 PM   #71
L Bo
RIP Brother
 
Member#: 8739
Join Date: Jul 2001
Chapter/Region: MAIC
Location: ~ 38.45 -75.05
Default

Did you already drain and replace your fuel before posting that vid? Not familiar with your carb but know dirty fuel can wreak havoc as well dirty or clogged jets.

If you rebuilt the carb and still have issues I would start with new fuel and making sure jets are clean. Thats all I got.
L Bo is offline   Reply With Quote
Old 10-07-2012, 06:44 PM   #72
VpointVick
Scooby Specialist
 
Member#: 93193
Join Date: Aug 2005
Chapter/Region: South East
Location: Charlotte
Vehicle:
'90 Ishtbox Corolla
maroon, as in, I hope not

Default

Quote:
Originally Posted by UKscooby View Post
I rebuilt the pump and had it running perfectly for about 5 minutes. Super excited until I looked down at the temp gauge and saw 160 instead of 120. It was then I realized I forgot to turn the hose pipe on. I killed the impeller. Supposedly this ez load trailer is worth about $800. Any takers? Comes with free boat.

They say a boat is a big hole in the water that you throw money into.
VpointVick is online now   Reply With Quote
Old 10-07-2012, 07:08 PM   #73
UKscooby
Scooby Specialist
 
Member#: 33287
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: 2013 Focus ST, Yella
Vehicle:
RIP Nik
I will always miss you

Default

I was sick to my stomach. I almost cried. All weekend long I've been telling myself water first engine second.

L bo: fresh fuel and a spotless carb. It runs fine now.
UKscooby is online now   Reply With Quote
Old 10-07-2012, 08:09 PM   #74
Matt K
NASIOC Supporter
 
Member#: 45204
Join Date: Oct 2003
Chapter/Region: NESIC
Location: you are so complex
Vehicle:
16 you don't
respond to danger

Default

Hahaha, impeller should be like $30 and 10 minutes to change out, everybody does it once

Congrats on getting it running right!
Matt K is offline   Reply With Quote
Old 10-07-2012, 08:57 PM   #75
bcblues
Scooby Specialist
 
Member#: 17256
Join Date: Apr 2002
Chapter/Region: MWSOC
Location: America's Outback
Vehicle:
04 STi
Blue w/ custom bug splat

Default

Did my original post never make it though the sensors? Or is this a new thread?
bcblues is offline   Reply With Quote
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


All times are GMT -4. The time now is 10:06 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.