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15-02-2011, 08:39 PM
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#1 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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Hey Hey,
I have and AU2 SR, Since converting it manual its been hard to start in the mornings when its dead cold. It started fine on the auto ecu and but as soon as i fitted the manual ecu its been hard to start when cold. The ecu is a AU2/3 HP XR6 item. I have checked the Head temp sensor, Wiring, plugs, ecu connections, cluster and had ford check the sensor when its cold with IDS and its fine. Ive checked everything. Ford is useless and cant tell me anything. Hot/warm starts are perfect. I'm thinking the XR6 ecu is dumping in too much fuel when its cold ?
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15-02-2011, 08:41 PM
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meh.
 
Join Date: Jul 2010
Location: Was Central Coast, Now Sydney NSW
Posts: 8,584
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dumping more fuel when cold helps with spark ;)
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Previous - BF XR6T - 325rwkw, 6 Speed Auto, Process West, X-Force and Turbosmart gear |
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15-02-2011, 09:00 PM
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#3 | |||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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Quote:
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15-02-2011, 09:03 PM
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#4 | ||
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meh.
Join Date: Jul 2010
Location: Was Central Coast, Now Sydney NSW
Posts: 8,584
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aha... now i see..
might it have something to do with the factory XR6 tune that is calibrated for the bigger reg/injectors/fuel pressure?
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Previous - BF XR6T - 325rwkw, 6 Speed Auto, Process West, X-Force and Turbosmart gear |
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15-02-2011, 09:05 PM
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#5 | |||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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Quote:
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AU XLS. |
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16-02-2011, 03:48 PM
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#6 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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Tried to get a snap on scan tool to check for codes today and it wont connect to the ECU but it will connect to the BEM fine.
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AU XLS. |
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16-02-2011, 10:29 PM
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
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is it possible that something else has started fail at the same time as your conversion??? sometimes the most unlikely things happen coincedently.
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17-02-2011, 01:29 AM
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#8 | ||
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Miami Pilot
 
Join Date: Jan 2005
Location: ACT
Posts: 21,704
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Try this when it won't start cold:
1. Turn ignition off 2. Put foot on throttle and hold flat to floor (Keep it pressed until step 4) 3. Turn key to start car. 4. It should fire up within about 3 to 5 seconds. If it does, the foot to the floor thing tells that car that it is in a flooded state and so cuts fuel but continues spark, so if it's flooded, it should start, and once you release the throttle, it meters out the right amount of fuel to continue running. If it doesn't, then it's possibly not getting enough fuel, or your leads/plugs/coil need replacing, or perhaps even your battery and/or alternator. Sorry to be so vague, but non-start on cold but OK start when warm tends to suggest a spark meeting fuel issue, and if it's not fuel, then it must be spark, which could be anything from not enough CCA when cold to get a good spark, through to failed coilpack, or leads, or plugs. Not everything shows up on a scan tool (which makes this kind of thing just that little bit harder to diagnose.
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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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18-02-2011, 04:49 PM
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#9 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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A scan tool wont even talk to it, IDS wont talk to it. If i plug the auto ecu back its perfect. Plugs, leads are new and the coil is fine as i checked that today with a known good unit. My battery is about 5 or 6 years old but it cranks fine and i can have the stereo going at work all day and have no issues with cranking.
I will try pedal idea tomorrow morning and post results. Thanks.
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19-02-2011, 01:43 PM
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#10 | ||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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the HP ecu expects to see a different cam and fuel pressure reg thats your best starting point
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[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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20-02-2011, 02:28 AM
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#11 | ||
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
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any updates?
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20-02-2011, 09:39 AM
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#12 | ||
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Miami Pilot
Join Date: Jan 2005
Location: ACT
Posts: 21,704
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One more thought - have you checked the inlet manifold bolts? If they are loose, then when cold it may make it hard to start.
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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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20-02-2011, 12:37 PM
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#13 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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Holding the pedal to WOT wont let it start at all, Not even cough or splutter. Manifold bolts are tight and no leaks.
With the xr6 gear fitted ie the FPR and cam, The HP FPR has just a few psi extra fuel pressure but its worth a look. I dont think the cam would make much difference but ill look into it too. Ill get a video of it start tomorrow morning at 5am.
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20-02-2011, 02:40 PM
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#14 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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Something just popped into my head. Ford programmed the ECU for me so their IDS must have been talking to the manual ECU then. Why isnt it now
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22-03-2011, 09:15 PM
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#15 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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XR6 HP rail and reg was fitted this arvo and it was instantly better. Tomorrow morning will tell with dead cold starts.
Forte rail/reg = 39 psi/2.7 bar XR6 HP rail/reg = 50psi/3.5 bar
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29-03-2011, 07:57 PM
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#16 | ||
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Smile
Join Date: Dec 2004
Location: Merrylands Sydney
Posts: 8,541
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It sounds like the ecu is running the engine too lean. If it doesnt start.Unplug the exhaust gas sensor and try again.If it starts well its because the ecu will dump more fuel in without ego connected
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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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29-03-2011, 08:07 PM
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#17 | |||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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correct me if I'm wrong but my understanding is that the EGO sensor has no impact on cold start / running doesn't it have to heat up before it reads?
Quote:
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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29-03-2011, 08:13 PM
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#18 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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XR6 reg fixed everything. Ecu was expecting 50psi at the rail and was only getting 39psi.
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29-03-2011, 08:30 PM
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#19 | ||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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good stuff should have more go when driving too
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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31-03-2011, 08:41 PM
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#20 | ||
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Smile
Join Date: Dec 2004
Location: Merrylands Sydney
Posts: 8,541
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Got to love happy endings
__________________
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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AU2 hard start when cold.
Linear Mode
