Hey guys, this post is gonna be kind of long, just so I can explain the problem as best I can. You may wanna grab a snack or a beverage.
Anyway, the problem that I'm having is that when you do a hard acceleration on the car, the engine jerks/bucks and hesitates (to see exactly what I mean,
). A few different mechanics had suggested that I try changing the fuel filter, and one such mechanic test drove it and said it felt exactly as though it was a bad filter. So I recently replaced that, and it made a difference for all of 10 minutes, and then the car was back to its old game. This problem only happens when the car is in motion and you're really pressing down on the accelerator. By the time you reach about 45-50 mph, the jerking/hesitation subsides a bit. It still happens, but it's noticeably less intense, than when you're first picking up speed. The car has no (noticeable) problems when it idles or when you rev it. I thought maybe it was a possible transmission issue, but it shifts fine when you ease on the gas, and get up to speed gradually. As you can imagine, consistently driving like that is a you-know-what, especially when trying to merge on the freeway.
Anyway, the other night on my way home, my Check Engine light came on. So the following morning I took it to AutoZone to get a diagnostic. The code it brought up was P1443, and this is what the diagnostic slip had to say:
EVAP canister purge valve mechanical fault or VMV fault condition
ECM detected a fuel tank pressure change greater than a minus 7 inches of H20 in 30 seconds with purge less than 0.02 lbs. per minute
1. - Failed EVAP pressure sensor
2. - Blocked hose between purge valve and FTP sensor
3.- EVAP purge valve stuck closed"
I have no idea what any of this means. The guy at Auto Zone also mentioned something about a vacuum hose leak. And one other mechanic that I talked to, said that the problem could be a clogged catalytic converter. Has anyone ever had an issue like this before? Any explanations would be appreciated. And again, I apologize for the long post. There's also another issue I'm having, but I want to get some possible answers on this one first. Thanks in advance!