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Car Forum / Ford / Ford Falcon / May 2005Falcon XF EFI Computer Codes
Hello All I have a problem with an XF falcon and I was wondering if anyone knows how to extract the computer codes with a multimeter? I have a genuine Ford workshop manual that says the codes can be extracted using a multimeter but it does not say how. The fault with the Falcon is that it will barely start (after a lot of winding) and as soon as the automatic transmission is placed into gear the engine will not accelerate. When out of gear and on the rare occasion it does start it idles and accelerates very poorly. I have a complete set of sensors, meters etc to change over if needed. All I need is to extract the codes. Regards Phil > Hello All > I have a problem with an XF falcon and I was wondering if anyone knows [quoted text clipped - 12 lines] > > Phil wack a sensor up the tail pipe , bet its leaning out. > Hello All > I have a problem with an XF falcon and I was wondering if anyone knows > how to extract the computer codes with a multimeter? I have a genuine > Ford workshop manual that says the codes can be extracted using a > multimeter but it does not say how. You can make a simple code retrieval device by using the following equipment: A test light (two watt globe maximum) A pair of leads that will reach from the battery to the code output connector. A two pole on-off switch with leads. Connect as follows: Connect one side of the switch to the single wire at the code connector, and the other side to either the red wire on the 6 pin main code connector (for early models) or the black wire (for later models) (early and late models refers to pre and post ADR 87. Most unleaded versions are "late" models). Connect one side of the test lamp to the battery positive terminal. Connect the other side of the test lamp to the red/brown wire of the 6 pin code connector. You can now turn on the switch and read the code flashes on the lamp. > The fault with the Falcon is that it will barely start (after a lot of > winding) and as soon as the automatic transmission is placed into gear > the engine will not accelerate. When out of gear and on the rare > occasion it does start it idles and accelerates very poorly. I have a > complete set of sensors, meters etc to change over if needed. All I > need is to extract the codes. XF EFI Falcons are suseptible to a few niggly faults that cause problems like you've described, and you could check the following: Fuel pressure: Obviously it won't run properly if it's not getting enough, so make sure your filter is in good shape. Throttle position sensor adjustment. Idle air by-pass valve. Air flow meter. Vacuum leaks in the manifold or rocker cover (particularly the rocker cover area). Hope this helps, -- Regards, Noddy. > > Hello All > > I have a problem with an XF falcon and I was wondering if anyone knows [quoted text clipped - 46 lines] > Regards, > Noddy. Thanks very much Noddy. Very much appreciated. One more question, If I replace a sensor or meter do I need to reset the computer? I am pretty sure with my EF Falcon if a sensor is changed the computer has to be reset but I am not sure about the XF's. Regards Phil my XE had a sorta similar prob, after a few mechanics chased EFI solutions it still persisted, while checking the fuel pump i found a perished fuel line split half through (underneath) that caused probs whenever under load. col >> > Hello All >> > I have a problem with an XF falcon and I was wondering if anyone [quoted text clipped - 67 lines] > > Phil "PC" <fordtruc@norex.com.au> wrote in message > Thanks very much Noddy. Very much appreciated. One more question, If I > replace a sensor or meter do I need to reset the computer? I am pretty > sure with my EF Falcon if a sensor is changed the computer has to be > reset but I am not sure about the XF's. Not for the new device to work properly, but to eliminate the fault codes you need to run the engine and then recheck. -- Regards, Noddy. > "PC" <fordtruc@norex.com.au> wrote in message > [quoted text clipped - 9 lines] > Regards, > Noddy. Hello All This is proving to be a big problem. The EGR valve was leaking so I replaced it first. I then used Noddy's method to extract the codes and according to the workshop manual the computer system checks out OK but just to be on the safe side I swapped the throttle position sensor, idle air bypass valve and the air flow meter with ones that I know work as they were removed from a working engine. I also swapped the computer none of which fixed the problem. I checked the fuel pump and it was within specs in both pressure and flow. I have not yet checked for leaks around the rocker cover or manifold as yet. Regards Phil > > "PC" <fordtruc@norex.com.au> wrote in message > > [quoted text clipped - 40 lines] > > Phil Sounds like a fault along the electrics side of things: - First I would swap the coil and the TFI module. A faullt in one will kill the the other and vice a versa. So if your coil is going or gone the your TFI module is likely to go soon afterward - an it can die like a B grade actor in ham mode. I had a similar problem, but more extreme the engine would die when put into gear. An auto-electrician fixed it in around ten minutes for $60. The other thing I would check is the fuel filter - it’s often overlooked in the supply of petrol chain and a clogged one will not supply enough fuel fast enough whether or not the pump is in spec. Hope this helps. |
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