I have a 1985 BMW 318i. Refurbished the engine, but someone
put in the battery backwards before getting the car restarted. Now, Fuel, Air and Spark are all ok, it will chug with the gas from the Cold Start Injector, but won’t start. My only guess is the Injectors (new) are not getting correct signal. I’ve been working through the Bentley Service Manual, with a multi-meter, and have found the injectors’ voltage is ok, as well each is grounded ok, but there doesn’t seem to be any pulse at the injectors. All the electrical checks at each of the main electrical components seem to be ok, which Bentley tells me means I need to replace the component. I’m wondering if anyone has any
advice on which component to start on or other things to check, as opposed to trying/buying all new electronic components. Thanks for any help or advice you can give.