04 gmc sierra ac pulling into vacuum above idle.

[gtc4d]

Hello, i am new to the forum. I have a 04 sierra that i am having issues with. Several weeks back i pulled out all the 134a changed the orfice tube with a new one, pulled a vacuum and added 134a back in to proper amt. (i was having issues before and hoped this would fix it). when i observed the pressures it was around 90deg outside and pressures from memory were around 50L/230H at idle and when i added throttle the low side started to pull into a vacuum. from what i can tell it cuts out on low pressure the when pressure rises it kicks in again. after awhile it triggers a code and have to reset ecu to get it to reset. it seems like a good deal of oil on high side also. is this normal. any advice is very much appreciated.

Thanks,
Todd

[JohnHere]

The problem(s) could be someplace else, e.g., too much oil. But the first questions about the OT you should verify: #1, Did you install the correct OT having the right orifice size, and did you install it in the proper orientation?*; #2, Did the replacement OT match the color(s) of the old one?; #3, What type of debris, if any, did you find on the screen when you removed the old OT?; #4, Is another OT already installed in the condenser outlet, and did you install the new OT elsewhere in the liquid line?; #5, Is an in-line filter located in the condenser outlet?

*OEM lists at least two different OT's for your vehicle, hence, question #1.