OK, heres how it went....

Left to go to a friends house, pulled into traffic, got in the gas a little bit, not to the floor, only got up to about 3300 rpm or so. When I got to the light to make my turn, car started shaking real bad. When I gave it gas to go, it puttered really bad, I didnt give it more gas, just held the pedal where it was, then it just revved like normal and went, but with a little jerk. Check Engine Light just comes on. I already know its a missfire code, dammut!

I get right around the corner from the light, shut it off for a minute, continued to my friends house just fine, which is only about 2 miles max. Got there and pulled the codes....300: Random/multiple cylinder missfire...152: o2 sensor circuit high volts.

Made one little run around the block, and it did it again once, then fine again. Car sat for the nxt 2 hours.

Started the car up to leave, after about 10 seconds, it idles down to about ~500 or so and holds it, but the whole car is shaking, not vibrating, shaking. So I unhooked the batt for about 10 minutes, left to go home, car starts it again a block away.

1st light car starts actin bad again, so I shut it off, turn it back on, no help. Pulls a 302 code now too, start to accelerate, it putters, I hold the gas steady, not giving it more, it bogs, then goes, bogs, then goes. At this point I was mad and ready for it to blow. Next light, it idles about 550-600, but no shaking, and continues on home for the next mile or so no problems.

The engine isnt making any noises, no ticks or clicks. One buddy is suggesting a broken valve spring. He's broken them before and had them not make any noise, his opinion is valued, so Im planning on pulling a valve cover tomorrow too. I still havent pulled the plugs in this car since Ive owned it, for about 4 months now. Car is stock with mods listed, and 191k miles. Any other ideas?

 

Bump for the day crew.

 

The best thing you can do is pull the valve covers and spark plugs as you said. With 190,000 miles, it might not hurt to invest in a new set of springs and valve seals. If you did manage to break one, it at least sounds like it's kinda holding together (as opposed to being shattered), in which case you should consider yourself extremely lucky. If one of the stockers let go and you drop a valve, it'll be a BIG problem. Either way, I wouldn't start 'er up until you have a look see. Just don't rush yourself through it...

 

Well Im going to start pulling it apart in about an hour or so. I figure it could be a spring, just because of the mileage, and because it starts right up with no effort still, then after a few seconds starts to shudder, maybe a clogged fuel filter. If it is a spring still holding on, yes, I consider myself lucky right now that it made it home.

But if I end up having to pull the heads, what goodies may go in?!

Thanks for the input.

 

OK I didnt get much done today because I ran out of daylight, and I dropped the only 10mm socket I had and the car happily swallowed it up, but heres the drivers side....all checks out so far.