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behind the plastic in the passenger side foot space on the right (behind the light) there are 3 screws holding the plastic on

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Q: Where is the ecu on a 1991 Nissan 240sx?
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On your 1991 Nissan 240sx came with ECU obd1 was bad so Can you use ECU obd2 for it?

no. must be the same. you may be able to get away with OBD0 (zero)


Ill a 1989 Nissan 240sx ecu work with a 1991 Nissan 240sx?

Yes the ecu will work. First disconnect the battery and connect the new one then reconnect the batter. Start up the 240sx and it should work it not it needs to be diagnoste goggle 1990 240sx ECU CODES FOLLOW THE STEPS AND THAT SHOULD WORK I know cause I'm using a 1992 ECU FROM Nissan Stanza. I was told it's alittle advanced on the horse power side and idle moves quicker.


How do you reset the ecu for 97 Nissan 240sx?

you push the reset button on the back of the ECU.


Do 1991 Nissan 240sx come with LSD?

no


Will the passenger window from a 1991 Nissan 240sx fit into your 1995 Nissan 240sx?

Nope, different body styles


How do you replace the clutch in a 1991 Nissan 240sx?

ask the mechanic from the Nissan company


Will 1991 Nissan 240sx coilovers fit in a 1990 Nissan 240sx?

Yes they will, both are the s13 model and virtually everything on s13s is interchangeable.


What is the spark plug gap for a 1991 Nissan 240sx?

My 1992 Nissan 240 sx is 038


What makes a Nissan 240sx stop while you are driving?

what makes a 1991 Nissan 240sx stop while you drive. and it is not out of gas or oil. Could it be the ignition module


Will a 89 Nissan 240sx motor and ecu go in a 93?

NO, to pass smog test, it all needs to be original


Will a 91 Nissan 240sx hatchback engine fit in a 89 Nissan 240sx coupe?

Yup. you must transfer the whole wiring harness and the ecu though, the job is easy and straight forward, everything is plug and play


Where is the fuel pump located on a 1991 Nissan 240sx?

in the floor of the trunk or hatch