Okay I have a 1992 Camaro Rally Sport 6 cylinder 5 speed. I bought it as a project car and boy oh boy has it been a project! I can't really think of anything I haven't replaced on this car and it will not start. But...When the plugs are fresh and dry it does start. it'll run but, it idles extremely high 3000 and turn it off go to start it back it will not start because spark plugs are full of gasoline. Every sensor on this car has been replaced. Every test has been run on this car and everything is in working order. But it won't quit dumping gas in the plugs and burning real rich . Has anybody got any idea what else I can do?

 

If it's idling at 3000rpm then you either have a major vacuum leak, a problem with the IAC valve, or somebody has messed with the throttle stop screw and opened it way too far.

Check the fuel pressure. At key on engine off the pump should prime for 2 secs and pressure should be about 40psi. With engine idling it should be a few psi lower - the fuel pressure regulator should maintain a constant differential from manifold air pressure. When you turn the key back off, pressure should hold for at least several minutes. For an example, when I checked mine it leaked down about 5psi in 20 minutes.
If it leaks down quickly then you have a fuel leak, possibly at injectors.

 

I do know it has a vacuum leak I think it's in the manifold. Because all the vacuum lines have been replaced. However will that cause fuel to be dumped in all 6 spark plug reservoirs? Could all 6 injectors be leaky?. Every sensor on this car has been replaced and all the sensors have been tested and the fuel regulator has been checked the fuel pump is working it is brand new. Any other suggestions or is the vacuum leak causing it to dump the fuel? Or could it be the computer? Everything was fine until I started replacing things on it that were defective like the sensors the throttle positioning sensor and the idle air control sensor and the temperature sensor. I also had a map sensor in an EGR and they're all checking out to be in perfect working order. The car was running when I got it and somebody did mess with the idling screw but I have since then had the throttle body rebuilt. Also I have had the catalytic converter check to make sure it was not stopped up and it is not. Thank you in advance :-)

 

First things first , the IAC is not a "sensor" , it's a motorized device commanded by the ECM to adjust the airflow through the throttle body at idle . Not set up properly on initial installation it most certainly can be one hell of a vacuum leak at idle . But TBH that does not sound to be the source of your troubles , the soaking wet plugs indicating a far too rich instead of lean condition .

All things being equal and if the wiring and ECM are unmolested and functioning properly , your two prime suspects here are one or more leaking fuel injectors , or , despite the fact that you say it was checked , the fuel pressure regulator is bad , and fuel is being sucked from it through it's vacuum control port and flooding the intake manifold as it runs .

Unplug the vacuum line from the regulator , and give a good sniff for the smell of raw gas . ANY smell of gas in that line indicates a leaking diaphragm in the regulator and this would explain the super rich running condition .....

 

I think you have 2 separate issues. One being a vacuum leak, the other being the rich condition.

Are you getting any check engine codes? You should at least be getting a "rich exhaust" code, but maybe there are other codes also.
I agree the FPR is a likely cause of this.

Stepping back a bit, there are 2 general reasons for it to be rich:
1) There is a mechanical issue in the fuel system that is leaking fuel into the engine outside of ECM control
2) The ECM is intentionally commanding a ton of fuel (which would usually be caused by faulty sensor readings)

To decide between 1 and 2 - If you have a gauge, prime the system and then check the fuel pressure with key off. It should hold pressure at least for several minutes. If not, it's leaking somewhere and you have a problem in category 1.

If you don't have a gauge, at least check for fuel leaking into the vacuum line from the FPR as OrangeBird described. If you don't trust your nose then you can also try sucking on it with a vacuum pump or your mouth (obviously be careful if you do that). No fuel should come out.
If that test checks out, then I think it would really help narrow down the problem to get a fuel pressure gauge and do a pressure leakdown test.