Okay, I’ve got a 2004 1500 with the 4.7. I’ve been getting the P2074 code (which nobody seems to have posted a solution for) and I’ve been checking for an air leak. I’ve replaced a few old/loose hoses which didn’t fix the issue. (I’ve also replaced the MAP sensor, AIC sensor, and cleaned the TPS sensor but this isn’t related to my direct question.) I also sprayed carb cleaner around the TB and all air hoses and never got a response in RPM.
I bought a compression gauge to see if the vacuum pressure drops while running. I saw this can help determine if there is a vacuum leak. I hooked it up to the intake manifold via the brake booster hose and via the PCV hose but I never got a reading.
How much pressure (psi) should I see? Perhaps it’s not enough to detect on my gauge? I added a picture of it so you all can see. Maybe I’m doing something wrong, but it seemed pretty simple.
I appreciate your help in advance.
I bought a compression gauge to see if the vacuum pressure drops while running. I saw this can help determine if there is a vacuum leak. I hooked it up to the intake manifold via the brake booster hose and via the PCV hose but I never got a reading.
How much pressure (psi) should I see? Perhaps it’s not enough to detect on my gauge? I added a picture of it so you all can see. Maybe I’m doing something wrong, but it seemed pretty simple.
I appreciate your help in advance.
