I've been tracking through a bunch of issues with the Jeep, but as it stands my fuel trims for both banks immediately go to -10% to -15% as soon as I apply any throttle.
I noticed the purge solenoid goes from it's normal slow clicking to pretty fast clicking the second the throttle is opened slightly (which I assume is normal). This made me try disconnecting the purge valve, and I can raise the throttle and the fuel trims stay in normal range with it unplugged.
I've tested the purge valve, it holds vacuum and doesn't leak down over time. I've also put a vacuum gauge on it while running, and it shows a vacuum reading between the intake vacuum and ambient, so it is opening and closing.
I'm wondering if there's anything in the system that would cause too much fuel vapour to be pulled through? The evap system diagram shows the canister vented to air, would this being clogged mean too much vapour flow? Or if the canister was saturated with fuel? Or do I just need to replace the purge valve even though it seems to test good?
I noticed the purge solenoid goes from it's normal slow clicking to pretty fast clicking the second the throttle is opened slightly (which I assume is normal). This made me try disconnecting the purge valve, and I can raise the throttle and the fuel trims stay in normal range with it unplugged.
I've tested the purge valve, it holds vacuum and doesn't leak down over time. I've also put a vacuum gauge on it while running, and it shows a vacuum reading between the intake vacuum and ambient, so it is opening and closing.
I'm wondering if there's anything in the system that would cause too much fuel vapour to be pulled through? The evap system diagram shows the canister vented to air, would this being clogged mean too much vapour flow? Or if the canister was saturated with fuel? Or do I just need to replace the purge valve even though it seems to test good?