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20-09-2013, 09:35 AM
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Regular Member
Join Date: Jun 2007
Posts: 214
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G'day people.
I have a 2001 AU XR6 VCT Ute. When cold it simply does not want to start, always takes a couple of goes, and it helps if I pump the accelerator... When hot the engine starts first kick just like it should. The interesting part is that when cold, if I turn the key to on (without actually starting the engine) and leave it there for about a minute, and then try to start it, the engine fires first time and runs just like it should. Now in my mind, this means that I am "priming" the fuel pump by letting it run for a minute or so, building up fuel pressure before trying to start. I mentioned this to the mechanic who rebuilt my diff, and he said that there shouldn't be anything wrong with the fuel pump, because they either just stop working or work fine, there's no in between.. He suggested changing the fuel filter which I did but has not helped.. I have also recently replaced spark plugs, leads, intake gasket, cleaned the throttle body and air filter (K&N), and about 2 years ago I had the injectors reconditioned. Any ideas? |
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20-09-2013, 07:07 PM
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
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if you think it's a fuel problem perhaps, next fill wack a bottle of fuel system cleaner in the tank, use the tank up and see how it goes, if it's no good start testing stuff.
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20-09-2013, 10:07 PM
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Au Falcon = Mr Reliable
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
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I'd try mik's suggestion first & if that dont work a fuel pressure test could help diagnose a fuel system issue. Ask your mechanic about it if you cant diy, good luck!
Cheers, Maka
__________________
Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792 Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007) |
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20-09-2013, 10:15 PM
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When in doubt, GAS IT!!
Join Date: Sep 2006
Location: Lower Eyre Peninsula, SA
Posts: 3,018
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I think I read somewhere that there a gauze filter up at the fuel rail as well, but I may be mistaken. If it's there, maybe you should check that it isn't blocked as well. I'm sure someone will be able to confirm or refute if there is one.
Bushbasher
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. HERS- BFIII Wagon Gold, alloys, dual fuel, bullbar, big tow pack, trans cooler, fully rebuilt HD suspension, Clarion, alarmed, full 2 1/2" sports system, mint body MINE- AUII Forte Meteorite, dual fuel but otherwise bog stock. MINE- AUII Fairlane Sportsman Liquid Silver over meteorite,HIDs', Airhog, Eagle Leads, dual fuel, custom rear springs, BA slotted discs + a second one for spares . |
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21-09-2013, 09:56 AM
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Au Falcon = Mr Reliable
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
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Quote:
Its located in the fuel pressure regulator, heres how to clean it - http://www.fordforums.com.au/showthread.php?t=11376426 cheers, Maka
__________________
Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792 Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007) |
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21-09-2013, 08:02 PM
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5.6L x 2 pilot
  
Join Date: Dec 2009
Location: Canbra
Posts: 14,902
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Hi Wannabe.
My experience with the stock fuel pump is like exactly like your experience, not what you mechanic has theorised. The stock fuel pump will decrease in performance. I have had a 2yo pump showing signs of leaning the engine out on a dyno. I believe that you may be on the right track, by priming the pump and allowing the pressure to build. Cheers Stu
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2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024  2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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23-09-2013, 09:04 AM
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Regular Member
Join Date: Jun 2007
Posts: 214
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Sweet thanks fellas. I will try the fuel system cleaner and the regulator clean before spending any money.
Failing that, does anyone know if the fuel pump is easy to get to and replace in a ute, if I remove the tray liner first? Ta, Mark |
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23-09-2013, 10:10 AM
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Au Falcon = Mr Reliable
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
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Re: ute tub & fuel pump removal, have a look at these great threads -
http://www.fordforums.com.au/showthread.php?t=11308479 http://fordforums.com.au/showthread.php?t=11405023 cheers, Maka
__________________
Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792 Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007) |
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Another cold starting issue... AU XR6 VCT
Linear Mode
