Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Essentially my question would be about the integrity of testing a circuit for resistance.
But my fusion starts, idles ok. But upon pressing the accelerator pedal it starts surging, different results if i just floor it, it will rev up nicely.
Read codes and p0122,p0223,p02101,p02111, and p0113,p0103 for maf sensor.
I am following fords pinpoint test c, vref came short by 2 volts.
tp1 and tp2 values are way off.
So now i am at the part where you check for resistance between tps(on the 2.5 its technically etbtps) (electronic)and pcm connector.
its under 5ohm, next step calls to check pcm harness and ground, and here it wants over 10k ohms, i am measuring 1.4k.
Or test for 5v ref at another sensor. Then you'll know whether everything is being pulled down or just the TPS feed. And even if everything is being pulled down it might be the TPS feed doing it since you got a low resistance to ground on that wire.
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