The old motor had burneda hole ina piston. So a newer motor was found with 55000 and some change on it.

 

The compression is great. plugs an wires are good to.Im at a loss here.[>:]when i feel the motor it doesnt feel like its vibrating much though. it feels like being in a old corvette when inside though.

 

is it making any noises from the engine bay or under the car?

 

Im not hearing any banging, knocking or rattling. (still scratchin head) I also ran a code test on it today and the ses light wouldnt flash. It just stayed on... no #12flash or anything..ses light just stayed lit....all fuses are checked and good. I used a code reader and grounded the terminals to try it. But neither worked...... any thoughts?

 

Im gettin a feeling the ecm is shot or something.

 

i just put headers in and know it vibrates like jerakrys says is it normal

 

So you are saying these cars really vibrate like this? If so im not gonna worry bout it anymore.

 

No, they shouldn't vibrate the way you describe.

 

what the heck could it be vibrating from? This is drivin me nuts

 

I'm a little confused here, does it only vibrate when in park? or does it also vibrate in gear? If it doesnt vibrate in neutral and the engine doesnt jump up very far when you rev it then it could be the transmission. You said it was rebuilt 5000 miles ago, you dont just rebuild a tranny for fun, something was wrong.