Little background on the Situation First. I have a '90 CRX Si with a ZC Swap.

I recently purchase a Set of OER ITBs(Not Yet Installed), and the set up came with a N1 Spec ECU. Today I tried hooking it up instead of my '89 Teg ECU. I turned the Ignition to On, but did not start the car. Immediately the ECU started Flashing Code 13 (Atmospheric Pressure). With my '89 Teg ECU it gives no Codes and the car runs 100%.

The ECU is a PM7, that has been socketed with a PROM.

My question is, Why would it be throwing a code after only just being hooked up? I started and let the car idle and revved it a little bit and it stumbles. I checked my Manual and cannot locate this Atmosperic Pressure Sensor in the engine bay. I tried resetting the ECU to no Avail.

What else could this be and is this a Sensor the USDM cars have?

Thanks in Advance,

Mike

Here is a Picture of the ECU, may be it will lend a clue to someone out there.




Modified by '90 ZC REX at 8:20 PM 6/16/2004


Modified by '90 ZC REX at 8:20 PM 6/16/2004