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sensor grounds

tugalo

NAXJA Forum User
Location
easley, sc
Does anyone know the nomimal resistance to ground of pin B on the TPS? Pin B is supposed to be the ground, but it reads 27K on my 88 MJ. According to my wiring diagram, it grounds thru the ECM, the diagram does not show a discrete ground. Also, i found that the foil shielding on the wiring from the knock sensor is not grounded....

My truck skips badly at cruise around 2000-2500 Rpm....if i "feather" the gas
or step on the gas, the missing stops until i reach cruise again, the only other ideas i have are related to the change in vacuum, but i cannot find any leaks.....
 
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