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From my experience with Ford and holden to say a faulty map would only mean that after power is remove from system (battery) for more than 10 seconds this allows the ecu to dump its memory (map) and on first start up a procedure can be used like holden first start take revs to somewhere around 2500 and with attention to keeping the accelerator pedal position still at all times as once the revs level at 2400 2700 and keeping accelerator still you will notice the revs and even the timing alter a number of times the will sound tighter or loser as the ecu reads sensors and maps (tunes) the engine this is normally 60 sec in the manual i allways let 1min30sec go by OR the car will remap itself over the next 100klm or as written in manual

THIS should be done after any parts replaced or repairs have been done as the ecu will not igknowlege this untill after this procedure or driving 100klm at wich point a lot of people wonder why its not much different and tinker again only to give change for the ecu to detect I recommend to know the first start procedure as you know the car has new parts from performance and smooth idle MAKE sure to have your coded radio code first you will need to enter this I recommend anyone doing their own work buy a workshop manual like Ellery,s or such you need it even to set idle my 5lt ford you unplug one loom of intake certain size feeler gauge behind adjuster screw set 750rpm when hot then turn off replace plug and done idle set for the ecu to manage

and how to check sensors and sender units

I hope this helps some one even after a dead/ flat battery this will make idle smooth again

Darren

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โˆ™ 2012-03-28 10:29:58
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Q: Could faulty MAP cause erratic idle?
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