Here's the scenario...
Car has been intermittently hard to start. Yesterday, the car stopped starting all together. I suspected the Idle Valve as it was not buzzing as it used to however when I connected it a working car, it buzzes and appears to work. While troubleshooting, I noticed the CHECK ENGINE light is not lit when the key is turned on. I am going to check all the fuses in just a bit and am looking for other suggestions. On the chance that the ECU has gone south, will the ECU from an 87 325i plug in and work or are there problems with it being an older ECU?