fuel injection problem...car not running

I get a diagnostic error code 223 (idle control valve not present or
faulty.)

the car would run intermittant and tehn one day refused to start. I have
spark, and fuel to the the injectors (I can even get the injectors to
spray by pushing the valve in with a small screwdriver, but they are not
injecting fuel into the engine. I am really stumped. would the faulty
idle control valve prevent the car from starting? it's a $100-150 dollar
part, so I'ld rather not just start replacing things in a hit or miss
approach to repair. Is there a way to test? Does anybody know the
required voltage at the injectors?

thanks in advance--mike

 

Which car?

 

which model and year?

 

sorry

1989 740 gl 2.3l not turbo

 

1989 740 gl 2.3l nonturbo

 

The injectors get 12 volts through the resistors. At BAP, the guy at the
counter checked for basic operation with a little pulser device that ran off
a 9V battery. The symptoms really don't figure for actual injector trouble.
And I think the code is a red herring - the idle air control valve won't
kill the engine completely.

Have you verified you have spark? If not, start looking at the crank angle
sensor (on the flywheel housing in your model, IIRC) as a suspect. The
injectors don't inject if the engine doesn't seem to be turning. I know a
lot of people get uneasy when I suggest a spray of starter fluid in the air
cleaner to see if the engine will "vroom" if it gets fuel, but that is a
definitive way to determine whether your problem is just fuel delivery.

Mike