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i mean, i have to drive it to work. which is only 2 miles or so away. whats the compression test going to tell me? ive heard that somtimes coolant leaks in through a bad manifold gasket. i just had my oil changed at valvoline, im pretty sure they fill the coolant and my resivoir is half empty...

It started with a slight shake at idle. Then when im at any speed and the rpms go to about 12k it shakes the whole vehicle. When i give it more gas, the problem goes away. i am running the codes saying cylinder 4 misfire and misfire detected at startup. also some 02 sensor codes which i feel...