rb20 to s13 wiring gremlins

[lunzee]

Im asking for a rundown, im about to pick up a car this weekend, I will try to give as much information as possible. Its a 1991 240sx hatch no sunroof or power options, the motor is a rb20 that has been overhauled it was originally dual cam according to the owner, he said he purchased a lower swap harness from a company and the upper harness came with the car, but the problems that I know of are

Check engine light wont light up
No tach signal at all
No coolant temp signal
Speedometer works
Fuel gauge works
gauges are illuminated

Any help :rolleyes:would be appriciated

[budderigs]

You should find this to be helpful. After you get the car. I might be able to walk you through diagnosing it better

RB20DET Wiring Guide For Dummies (http://www.nicoclub.com/archives/rb20det-wiring-guide-for-dummies.html)

[lunzee]

I am also curious to how difficult this could turn out to be, worst case scenerio? Im not bad with wiring just not so happy I might have to do it

[lunzee]

And thank you that would be really appriciated

[budderigs]

I am also curious to how difficult this could turn out to be, worst case scenerio? Im not bad with wiring just not so happy I might have to do it

The car runs and drives fine correct? There are no wiring related driveabilty issues?

[lunzee]

The car runs and drives fine correct? There are no wiring related driveabilty issues?
No the car runs, drives,boosts perfectly, the speedometer gas gauge and light also work just the problems listed above

[budderigs]

It should be an easy fix.

[lunzee]

Then im going for it, thanks for the help I will definetly take you up on the offer to walk me through the wiring if I get stuck




Sent from my front right pocket,damn its dark...

[baube]

it's all under the dash, there's a brown plug near the heater. pretty easy to figure it out with a wiring guide. I used highfive's one for my swap...

[lunzee]

Can I access all of the wries easily or must the cluster or dash be pulled out

[godsmack]

it's pretty easy. it's in the kick panel where the computer is. if all else fails just wire up an aftermarket 5" tach and the coolant might just be a bad sensor.