I just got my engine rebuilt. I have this issue and is that the rpm's wont go any lower than 1100 and that's ok with the A/c om but without it it stays at 1100 and sometimes even higher. I have try adjusting the Idle screw and it just goes higher no matter which way i try. Try playing with the dis but thats a no no as well it will just give me a poor performance. So no error codes and im out of ideas. Did they set the timing on a different DTC? And if that's the case the front chain cover will have to be remove to set it back on specs? I will verify first and check to see where the distributor is pointing at DTC. Will update. Any advice?