Fordmods Logo

fuel system diagnosis. 

 

Page 2 of 2 [ 21 posts ] Go to page Previous  1, 2

 
 Post subject: Re: fuel system diagnosis.
Posted: Mon Dec 31, 2012 2:20 am 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 3440

Joined: 23rd Dec 2007

Gallery: 32 images

Ride: BA XR6T (mix of BA, BF and FG)

Location: Perth
WA, Australia

snap0964 wrote:
You can make a makeshift pressure gauge out of an old cappiliary oil pressure gauge. The gregory's does give you a fairly good std serviceability test for the pump - a telling one as previously mentioned is direct hookup to the pressure line before the injector rail. There is a leakdown test too - your pump motor might be okay, but the one way checkball might be allowing leakdown, meaning the pump's not cutting it at higher demand.
My XH's pump had this.



I think of the effort involved in all the possible tests and it seems like the best thing I can do is just swap the pump out and see if solves the issue. I have a spare here somewhere and I made a tool to get the tank lid off last time I did it so I can swap the pump out in 20 minutes.

Thank you all for the good advice and knowledgeable tips. I will get a fuel pressure gauge for the shed now so I have one ready next time.

Regards

Frank
Top
 Profile  
 
 
 Post subject: Re: fuel system diagnosis.
Posted: Mon Dec 31, 2012 8:21 am 
Moderator
Offline

Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

im pretty sure the pumps are a rotary vein or meshed gear pump, was your walbro a cheapy??
if and when you remove the pump look into the pick up hole in the bottom of the pump, if you see plastic its a walbro rip off.. if you see metal its a proper walbro..

just a thought, did you use proper submersible fuel hose linking the pump outlet to the line on the carrier??
if not the fuel hose may have perrished..
Top
 Profile  
 
 
 Post subject: Re: fuel system diagnosis.
Posted: Mon Dec 31, 2012 9:12 am 
Technical Contributor
Offline
User avatar

Age: 53

Posts: 5587

Joined: 14th Jan 2005

Gallery: 10 images

Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

frankieh wrote:
I think of the effort involved in all the possible tests and it seems like the best thing I can do is just swap the pump out and see if solves the issue. I have a spare here somewhere and I made a tool to get the tank lid off last time I did it so I can swap the pump out in 20 minutes.
In your case of course it's simpler.
You need to remove tubliner and floor panel to get to an XH pump, so it was easier to do a SST on the in situ pump - waste of effort accessing it if it tests to spec.
Other thing is it is useful to actually test pressure and leakdown - your spare could be marginal as well.
frankieh wrote:
Thank you all for the good advice and knowledgeable tips. I will get a fuel pressure gauge for the shed now so I have one ready next time.
The basic vacuum/pressure ones I've seen don't measure the pressures required for EFI - and ones that do were pretty expensive, hence the old oil pressure gauge - and considering the amount of use, it surprisingly did the job well.
If you do find one for reasonable $$$, let us know - I couldn't.

 

_________________

96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

Top
 Profile  
 
 
 Post subject: Re: fuel system diagnosis.
Posted: Mon Dec 31, 2012 10:28 am 
Technical Contributor
Offline
User avatar

Age: 28

Posts: 3705

Joined: 27th Sep 2006

Gallery: 20 images

Ride: ED Falcon

Power: 133 rwkw

Location: Leeton
NSW, Australia

snap0964 wrote:
frankieh wrote:
Thank you all for the good advice and knowledgeable tips. I will get a fuel pressure gauge for the shed now so I have one ready next time.
The basic vacuum/pressure ones I've seen don't measure the pressures required for EFI - and ones that do were pretty expensive, hence the old oil pressure gauge - and considering the amount of use, it surprisingly did the job well.
If you do find one for reasonable $$$, let us know - I couldn't.


I have one here Sanp from just a general tool/welding/farming shop... 0 to 60psi I think it is... And Collier & Miller in girffith were doing all std positive pressure gauge (not diagnostic gauges) for like 40 or 50 bucks from memory...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

Top
 Profile  
 
 
 Post subject: Re: fuel system diagnosis.
Posted: Mon Dec 31, 2012 7:05 pm 
Technical Contributor
Offline
User avatar

Age: 53

Posts: 5587

Joined: 14th Jan 2005

Gallery: 10 images

Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

Yeah, that's not too bad a price Tim.

 

_________________

96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

Top
 Profile  
 
 
 Post subject: Re: fuel system diagnosis.
Posted: Wed Jan 02, 2013 3:12 pm 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 3440

Joined: 23rd Dec 2007

Gallery: 32 images

Ride: BA XR6T (mix of BA, BF and FG)

Location: Perth
WA, Australia

TROYMAN wrote:
Just a thought, did you use proper submersible fuel hose linking the pump outlet to the line on the carrier??
if not the fuel hose may have perrished..



Troyman has the winning bid..

I pulled the pump out and took a look.. the hose was mostly gone.. It was proper hi pressure fuel line hose, but apparently not submersible. It disintegrated and coated everything with sludge. (I learned something today... I didn't know the hose had to be special submersible grade)

Image

Repco were having a 25-40% off after xmas sale so in the interests of not doing this again any time soon I bought a fuelmiser pump. with a 2 year warranty. Since my Walbro is fine, it goes back in the cupboard. The Fuelmiser had all new proper hoses and pickup filters so it should all be spot on for the foreseeable future. (Car runs like a dream again on lovely expensive 98 premium unleaded.)

While I had the car on stands to put the filter in.. I figured I might as well put the Gabriel Ultra's that have been floating around the boot for 6 months in too... makes a huge difference so I am glad I was put in a position where I was forced to do it. :-)

On the subject of fuel pressure guages.. the cheapie ebay rising reg I bought ages ago has a fuel pressure guage on it and I think I only paid $50 for that.... it looks like this:
http://www.ebay.com.au/itm/RISING-RATE-FUEL-PRESSURE-REGULATOR-200SX-SKYLINE-WRX-/180483423348?pt=AU_Car_Parts_Accessories&hash=item2a05a67c74 but as i said, I don't think I paid that much for it. Might be worth putting it in just for the benefit of a permanently connected guage.

Now that my petrol situation is stable for a while... My second Blos carby has just arrived.. so now that I have two I can start figuring out how to do the plumbing for them.. I was thinking of using the section of an old EF fuel runner intake pipe where it splits into 2 2.5 inch runners... If I can get two of those (have one here already) I can modify the intake to split into two for each BLOS gas carby and then back to 1 and into the intake. Spose I have to look for a y splitter for the hose from the converter too. good fun. :-)


Thank you to all of you for your help and suggestions... this place is a better resource than either of my manuals. :-)
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 2 of 2  [ 21 posts ]  Go to page Previous  1, 2

Who is online

Users browsing this forum: No registered users and 9 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

 

 

It is currently Thu Dec 14, 2017 12:10 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names