dgoad

Another Update,
It looks like internet and my repair book is wrong on the subject of MAP sensor voltage. I was told that the MAP sensor puts out 1.2 - 1.6 volts at idle and around 4.2 - 4.5 at Wide open. This data is wrong. I found a chart that states the MAP sensor will return about 4.5 volts at 0-1000ft of pressure altitude and work its way down to about 2.2 volts at 10,000ft. That means that before idle ( car on ) the Baro and the MAP should read almost the same and since I am at sea level we should see about 4.x volts. Today the Barometer read 29.83 and the MAP read 29.47 and about 4.1 volts. Start the engine and the MAP sensor shows a small vacuum down to 27.xx and the voltage goes to about 3.9 +-. When the engine RPM is raised the MAP reading goes down into the 19.50 range with a voltage output of 2.6 +- or so at high RPMs. This would tell me that the manafold pressure is -10psi with respect to the outside air or 10psi of vacuum. I was getting a MAP sensor HIGH voltage error code. My old sensor was putting out about 0.5 volts too high or around 4.7 volts at ( ON ). I thought that the MAP was bad and today I changed it. The output voltage is lower and the error code is now gone, but the engine still runs and hunts very bad on idle with both injectors plugged in and runs 85-90% the way it should on only one injector. I guess I am back to being lost. I see that the computer is telling me that the injector ON time is running around 3.8 msec or so. This does change with throttle application. Question? Since I know that different injectors ( they make many sizes and flow rates ) flow more or less fuel with the same pulse width, where would I find out what flow rate the original injectors where to output( lbs/min ) and where is it written what pulse width should the cpu be sending to the injectors at idle. The engine did have leaking injectors before I changed them, but I am thinking that maybe the flow rates are different between the two sets. Maybe not. What I do know is that there is too much fuel spraying into the engine at idle when both injectors are pluged in. Also where can I find a list of data or specifications for all the sensors, on a normal good running 4.3L engine. What should they read at idle? Anyone got any ideas about where to find this stuff. I have spent hours looking on the internet for it and I can't seem to find it. Anyway, I still want to see about the computer also. I am still looking for anyone that might have any ideas, I am all ears. I will try to post any updates, as they might help anyone else. But this is getting pretty stupid and I am almost sure that the fix has been missed or it is the computer and I have not gotten there yet. I also re-read the fuel pressure specs and I think I mis-understood what it was saying. It should have been 13psi - down 3 to 10psi, not 13 down to 3, but I am still marginal there maybe a little low at full throttle, so I will have to fix that at some point, don't think it will effect my idle problem at this time. Thanks for your time and help.