Got a miss

[blk_jaws]

Ok guys Ive got some kind of a miss that Im very confused about.

The car runs great for a while but when I start running it a little hard it starts to miss, and it aint a tiny miss. When you got the gas down you can actually fell the car missing, it feels like its shaking and jumping.

Some people say that its the valve springs but I aint sure.

Any help

[blk_jaws]

No ideas huh?

[0rion]

how many miles on your plugs and wires? Have you checked your fuel pressure? How many miles on the fuel filter? Just start with the small obvious things first and work your way up the ladder. Is the car throwing any codes? If so what are they? Sounds possibly fuel related to me but without actually being there and data logging the car that's more of a guess than anything.

[blk_jaws]

Well the car has 78,000 miles on it. I do have the service engine light on, i got it checked at advance auto and it said 2 o2 sensors were bad and a random cylinder misfire. I changed the o2's but it still does it.

[0rion]

78k on the plugs and wires? Those are probably about due up. Do you remember what the actual O2 codes were? I would probably start at the plugs and wires with that many miles on them. I would also check fuel pressure at the rail while I was at it or just go ahead and replace the fuel filter because it's over due anyhow at those miles.

[JayTA98]

Orion I will suggest the same. Change your spark plugs and wires. My TA 98 went thru 2 set of wires that had 1 or 2 wires open. This will cause a bad idle and sometimes a miss on my car. I replaced the wires with MSD's just to try them out. So far no problems. Hope this helps.

[mikeaford]

I had a HORRIFIC miss shook the bajezus out of the rear when I hit the gas - loose spark plug.... Check there!!