should there be a difference with isc disconnected - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

pippen · 10-17-2005, 05:07

should there be a difference with isc disconnected, i disconnected it and it made no difference to the way the engine run at all.

oldwagon · 10-18-2005, 00:31

It depends. Is the motor hot, is it cold, etc.! If it is an EF or EL it could have a faulty ecu.

NARCEA · 10-19-2005, 21:46

carrying on from this topic i disconnected the O2 sensor on the ea and been driving it all week without issues..... does that mean it's cactus?
cheers,
ian

oldwagon · 10-20-2005, 01:45

Your o2 sensor is most likely stuffed - I bet it will pick up nearly 100km extra out of a tank of fuel if you replace it. BTW, on an EA or similar o2 sensors will make no noticeable difference to how the car drives; it only trims the fuel setting - the map and coolant temp do most of the work.

NARCEA · 10-20-2005, 02:46

cheers oldwagon... anyway of testing whether its stuffed for sure. will it show up if i read the ecu?

NARCEA · 10-20-2005, 02:53

and if it helps im getting around 215km from 30L combination of stop start and some freeway driving.
cheers,
ian

EED-250 · 10-20-2005, 03:23

i have my ISC disconeccted on my ED. The only things i notice are when i change gears my revs drop quick, they dont hang, and it wont idle when its cold. It takes about 20 seconds before it will idle cold.

oldwagon · 10-21-2005, 00:36

Just change the sensor! A new one should not cost you more than $100. You would probably need an oscilloscope to test it properly.