Thanks everybody, Today I put a cap on the second port, but nothing changed. I found the vacuum diagram and checked each hose, but didn't find anything wrong. I used propane like suggested and the only time the RPM's went up is when I sprayed propane directly into the second connector on the manifol...

Thanks a lot for your help. I'm quite certain that the hoses I check do not leak. However, I will take you advice and use propane to find the leak. Does anyone know what the extra hose connector at the manifold is for? See picture above.

Thanks

It is not a plug. It is a connector just like the one where there is a vacuum line is connected to it. There is no connector unoccupied on the air filter box. So I don't know where it would connect to and there is no loose vacuum line anywhere that might connect to it. I closed that connector to see...

Was unable to find any vacuum leaks, but found a empty hose connector. However, it made no difference when I put a cap on it.
Does anyone knows if there should be a vacuum line connected to (see pic) and where the other end would connect to?

Thanks Dreaser,

Is there an actual vacuum pump or what creates the vacuum?

I have a problem with what seems to be the LT FTRM1 & LT FTRIM2 since both of these values do not change and both remain at -0.8 See attached scanner readings. The car starts up and idles, but when reaching approx. 2000 rpm it will stall.(The car is not drivable) I changed both O2 downstream sen...

Dreaser you have been great help! I think you're right that the o2 sensors in bank 2 are not working. I didn't physically check how may sensors there are, but I believe there are 2 in bank 1 and 2 in bank 2. I sprayed some brake cleaner in the intake like you suggested, but nothing changed in the re...

Thanks, why is fuel sys 2 still open? Do you know what is fuel sys 1 and what is fuel sys 2?

I attached a doc with the engine readings

HERE ARE SEVERAL READINGS WITH WARM ENGINE: ABSLT TPS 31.1% ABSLT TPS 21.6% ABSLT TPS 20.4% COOLANT 106 CELSIUS CALC LOAD 5.5% COOLANT 99 CELSIUS CALC LOAD 14.1% COOLANT 104 CELSIUS CALC LOAD 6.3% ENG SPEED 1498 RPM ENG SPEED 577 RPM ENG SPEED 749 RPM FUEL SYS 1 CLSD FUEL SYS 1 CLSD FUEL SYS 1 CLSD ...