Fusion 1.6 Posted May 31, 2016 Share Posted May 31, 2016 Got a 07 Fusion Duratec recently while driving noticed a jerky throttle response. This only happens when the speedometer is not working. Has any one come across a similar issue. How to resolve this. Quote Link to comment Share on other sites More sharing options...
Jimgeriatric Posted September 21, 2016 Share Posted September 21, 2016 Hi newbie yes I have had this problem in the past changed spark plugs then ok. Also found I had same characteristics took to a specialist garage for electronic and ecu problems in Warringtod they diagnosed coil pack problem they fitted a new Ford coil pack and ht leads wow it was suddenly like a ford Ferrari. Hope this helps. Regards jim Quote Link to comment Share on other sites More sharing options...
Tdci-Peter Posted September 21, 2016 Share Posted September 21, 2016 On 31/05/2016 at 3:56 PM, Fusion 1.6 said: jerky throttle response. This only happens when the speedometer is not working. Jerky throttle on its own could be plugs & coil pack, as Jim found, or dodgy throttle body. But if it really is linked to the speedo failing, then it looks to be more of an electronic problem. Likely suspects are the IC (Instrument cluster) & the wiring to it. The IC gets speed data from the ABS (or PCM if it is a non-ABS car), and usually it reads one of the dual accelerator pedal sensors, and sends this data to the pcm. The main system bus (HS-CAN) carries this data. If it is electronic, I would be a bit surprised if no codes (DTCs) were being generated. A system like Forscan can read all the car's modules, and extract any DTCs. These might give a clue, if found. Quote Link to comment Share on other sites More sharing options...
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