1993 Toyota Corolla
153K miles, Manual Transmission
I went awhile without a gas cap, so I figure my problem is partly water damage related. I have a gas cap now, and and one point my car would not start. With a bottle of HEET and ten minutes of trying it eventually fired up. I've been through quite a few fuel cleaners now and I still have a huge lack of power. The idle is rough and hesitates every ~5 seconds. There is a rattle when I am in a high gear while going a slow speed. After sitting for awhile I get white smoke from the muffler off the start. My lack of power is defined by an inability to accelerate quickly, struggles with steep inclines, and a governor kicking in earlier than it has before. Also my MPG has dropped (probably expected).
I have replaced the fuel filter and spark plugs, with hardly any improvement. Any suggestions?