Serious fuel injection problem.

[estrada42]

I've been trying to fix a fuel problem on my 89 525i 5-speed for a few weeks now, and searching just isn't fixing my problem.

I went to show the car for sale and the car started and idled fine. After the car warmed up, there sounded like there was a misfire. After giving it some gas three cylinder stopped firing all-together.

I limped the car (about .3 miles of flat surfaces) and pulled the engine code via the pedal stomp. Got code "1251 Fuel Injector 1 (or group 1)". I took my results to a mechanic friend of mine and he suggested resistance checking all the injectors and making sure there in spec. Also to try dis-connecting an injector at a time and see if the other five fired up.

All the injectors measured at either 15.8 or 15.9 ohm. If I disonnect any of the injectors, the car won't start at all. Right now the car starts but only runs on three cylinders.

My next thought is to test what ever it is that triggers the injector grounp to fire. Also to check and see if the injectors are getting a signal in the first place.

So my question is, whats the next step? Whats the next test I can try to get this car back on the road? Any thought? TIA.