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07-03-2011, 09:12 PM
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Custom e-series owner
Join Date: Feb 2006
Location: wodonga vic
Posts: 840
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hi there all
i have a 02 xr8 ute and it has been getting like a big flat spot, say when taking off it just hesitates a fair bit then decides to go. its duel fuel and doesn't do it on gas. so i know its fuel related just where to start. i have only had the car for about 5 months. i have put new leads, plugs and msd coils on it. i am going to get a fuel filter for it, its only started doing it the last couple of weeks. i was thinking fuel pump but once it gets through that flat spot it will rev out. anyone had any problem like this?? also i only run bp ultimate in it. cheers for any help
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88 ea falcon fresh paint, 20 inch chrome wheels, ed xr front, scorcher body kit, ef/el mirrors and door trims, UPC 330mm twin piston big brakes, manual, front adjustable coil overs, 2.5 inch exhaust, twin thermos etc etc **atomic built 660kw AU engine being fitted**
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07-03-2011, 09:15 PM
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Starter Motor
Join Date: Oct 2009
Location: North QLD
Posts: 8
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Does this happen only when it cold or all the time?
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07-03-2011, 09:56 PM
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not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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Is the MAF clean?
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2024 F150 XLT
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08-03-2011, 08:50 AM
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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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dirty injectors perhaps?
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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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08-03-2011, 11:51 AM
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#5 | ||
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Custom e-series owner
Join Date: Feb 2006
Location: wodonga vic
Posts: 840
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its a little worse when cold but still happens when hot
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88 ea falcon fresh paint, 20 inch chrome wheels, ed xr front, scorcher body kit, ef/el mirrors and door trims, UPC 330mm twin piston big brakes, manual, front adjustable coil overs, 2.5 inch exhaust, twin thermos etc etc **atomic built 660kw AU engine being fitted**
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08-03-2011, 03:51 PM
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#6 | ||
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adrian
Join Date: Aug 2005
Location: Christchurch, New Zealand
Posts: 495
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clean the maf
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T3 TS50 #17 275kW AU3 XR8 SVP 220kW |
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08-03-2011, 04:00 PM
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#7 | ||
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Starter Motor
Join Date: Oct 2009
Location: North QLD
Posts: 8
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because you are still burning fuel(LPG) it creates carbon and since you are not utilizing the fuel injectors on petrol all the time they can carbon up causing flat spots. I was once told by an old school ford mechanic of a very crude method of removing the carbon from the injectors by mixing 50/50 water and brake fluid, taking a vacuum line off the manifold and whilst reving the enging suck up the mixture slowly through the vacuum line it actuall disolves the carbon from the inlet valve and the injector nozzles. Be aware it smokes like a b*#ch so you should take it somewhere deserted.
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10-03-2011, 06:33 PM
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#8 | ||
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Custom e-series owner
Join Date: Feb 2006
Location: wodonga vic
Posts: 840
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cheers fellas, i've cleaned the maf, but stilll happening. put some injector cleaner in the tank and see how that goes. if its doesn't start going better soon i'll pull the injectors out and give them a clean, plus i hae to change my fuel filter and i might also put some new oxy sensors in while i am at it
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88 ea falcon fresh paint, 20 inch chrome wheels, ed xr front, scorcher body kit, ef/el mirrors and door trims, UPC 330mm twin piston big brakes, manual, front adjustable coil overs, 2.5 inch exhaust, twin thermos etc etc **atomic built 660kw AU engine being fitted**
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19-04-2011, 10:19 AM
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#9 | ||
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Regular Member
Join Date: Nov 2009
Posts: 39
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So what fixed the problem, cause im having a similar problem but with my ba 6
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19-04-2011, 04:03 PM
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#10 | ||
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rexnet
Join Date: Feb 2010
Location: Adelaide, South Australia
Posts: 3,562
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inlet manifold gasket?
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19-04-2011, 07:19 PM
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#11 | ||
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Custom e-series owner
Join Date: Feb 2006
Location: wodonga vic
Posts: 840
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Changed the fuel Filter and that made a difference.. i still have a little bit of a rough spot with the fuel but it is better than before.
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88 ea falcon fresh paint, 20 inch chrome wheels, ed xr front, scorcher body kit, ef/el mirrors and door trims, UPC 330mm twin piston big brakes, manual, front adjustable coil overs, 2.5 inch exhaust, twin thermos etc etc **atomic built 660kw AU engine being fitted**
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19-04-2011, 08:49 PM
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#12 | ||
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Smile
Join Date: Dec 2004
Location: Merrylands Sydney
Posts: 8,541
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Disconnect the car battery and leave it of for 20 odd minutes to reset the ecu. If that doesnt work then your fuel system needs looking at.
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Stingray Car Security ph 0414445444 Single din radio fascias for fg to fgx fords Australia wide . FG 1 2 and 3 gauge holder in stock now! https://stingraycar.com.au/shop/ Site Sponsor See Sponsor Stingray Car Security 😍👌✌ AU wagon 6 14.241@96.75 1/4 mile sold.Octane fg xr6 turbo!! 12.312 112.21 mph home tune f6 injectors gone ..now in nitro fgxr6t ready to go again 
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flat spot
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