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19-08-2010, 02:20 AM
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#1 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2009
Posts: 629
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Hi everyone,
my AU XR8 is idling terribly and chewing through alot of fuel! When the car is left idling for a couple of minutes, the revs drop as low as 2-300rpm and if u giv the accelerater pedal a little stab it drops even lower and sometimes stalls. Also, when it idles in P or N u can smell the fuel being dumped out of the exhaust. Car has 130,000kms. No mods, just twin 2.5 inch exhaust. I'm guessing could be leads or something? Coil packs are same from factory..... What about O2 sensors or fuel pump? Any help would be great! thanks in advance |
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19-08-2010, 08:45 AM
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#2 | ||
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Formally kotevski22
Join Date: Feb 2010
Location: Shellharbour
Posts: 697
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Check fuel pressure regulator vacuum hose for leak or cracked.
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19-08-2010, 09:07 AM
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Miami Pilot
 
Join Date: Jan 2005
Location: ACT
Posts: 21,703
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Is the MAF connected? Is it clean? The default state of tune when the MAF doesn't work or is not connected is a very rich base tune, with resulting loss of power, poor idle and lots of fuel being dumped out the back.
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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19-08-2010, 10:40 AM
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#4 | ||
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Back on the road
Join Date: Dec 2004
Location: Wollongong, NSW
Posts: 3,205
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Start by looking at the MAF, as per JCs comments.
Or even the pipework connecting the MAF to the Throttle-body...maybe its loose and is not airtight i.e. massive vacuum leak.
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------------------------------------------------------------------------- AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute 5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor. Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash. |
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19-08-2010, 11:54 AM
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#5 | ||
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not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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Check MAF then 02 sensors.
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2024 F150 XLT
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26-08-2010, 06:08 AM
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#6 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2009
Posts: 629
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Whats the best way to clean a Maf?
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26-08-2010, 08:33 AM
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#7 | |||
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Miami Pilot
Join Date: Jan 2005
Location: ACT
Posts: 21,703
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Quote:
But I know you meant what product. Carbie cleaner will do it. Wd40 will work. Even good old metho. But clean it gently and let it air dry (or use hair dryer or heat gun) before you try starting it up again. Before you clean it though - are you running a K&N filter? Has it recently been oiled? If not, chances are the MAF itself is OK, but check the plug. If you can get a scan tool hooked up to it to see if there's any codes, that would be the first thing to do. While we can try to help over the net, you may replace or clean etc random parts for no effect, whereas $50 odd to take it to a workshop for a scan tool read and/or diagnosis might end up being cheaper.
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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26-08-2010, 03:52 PM
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#8 | ||
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adrian
Join Date: Aug 2005
Location: Christchurch, New Zealand
Posts: 495
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what ever you use it musn't leave a residue. thats what screws them up, so carbie cleaner or brake cleaner, nothing oily, and you are better off not touching it with anything, just use the cleaner and a hair drier.
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T3 TS50 #17 275kW AU3 XR8 SVP 220kW |
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26-08-2010, 04:01 PM
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#9 | ||
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not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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You can get specialist MAF cleaner from autobarn.
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2024 F150 XLT
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26-08-2010, 05:33 PM
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#10 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2009
Posts: 629
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Thanks guys
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26-08-2010, 06:28 PM
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#11 | |||
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Miami Pilot
Join Date: Jan 2005
Location: ACT
Posts: 21,703
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Quote:
__________________
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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AU XR8 S3 idling terribly!
Linear Mode
