Everybody! I finally have a "FIX" for my acceleration issue. As it turns out the P0453 Evaporative Emission Control System Pressure Sensor High Input code was significant. I was talking to my boss and he used to turn wrenches for a GM dealer. We talked through the problem. I had mentioned that I had a high pressure in the gas tank. It's important to understand how the evaporative pressure is handled. There is a valve that opens up and sucks the gas vapors from the charcoal tank. While the valve is open, the system tests for a vacuum or low pressure at the gas tank sender. Here is a schematic of the Evaporative leak system.

[img alt="Evap System
"]https://cimg2.ibsrv.net/gimg/www.crossfireforum.org-vbulletin/830x554/crossfire_evaporative_system_e970c87bd63c2b7bba6b5 1ef9743b7071a8a10b0.jpg[/img]
Evap System

There is a hose that goes to item 11, Evap Purge Solenoid from the vacuum intake at the throttle body. I had replaced that recently. There is a hose from there to the charcoal canister item 12. So when I was accelerating , that valve will open up and I will get a jerk or a hesitation. At idle the car would shut off when the valve open. So how do I know this? I removed the line from the Evap Purge Solenoid and plugged it. I used a end of a bottle brush I had cut off. See picture. Since then I had not a single issue. The car works wonderfully. Now having said that I still have a code and engine light. I will start a new thread.


My cheat code fix for my acceleration issue.



If the line was damanged or compromised in some way, when the valve