well i have eliminated alot since the last time i have post about it. I know it is the engine not tranny or flex plate/torque converter. I have also changed the balancer, plugs, wires, distibutor. I checked timing and besides a little flux it is on 6 deg btc. The timing chain is 1 year old and a double roller. The compression on all is between 135-145 psi. I have tried to pull the inctectors to see if any of them drop more than the other, with little change. I need a direction before i tear into the motor. It has been suggested the one of the springs is toast or a bent push rods..... Please point me in the right direction thnx THE SHAGGY( THOUGH NOW DEFUNCT) IROC:ROLLEYES:

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'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money

 

i forgot , no codes. Also it smells really rich at the back. Oh and it only seem s to happen after the motor is at temp(185deg)

 

back again, with an update........ I found out i had 4 bad fuel injectors. So that was the reason for the vibration at 1800 rpm. Now i have a vibration at 1600 rpm. The motor is smooth and the exhaust sounds very smooth, but in side the car the is a resonance. I also seem to have a vibration at 3000 and higher. Again this is all with the motor at temp. Also it is not the trans or T/C, as i have disconnected them and it is still there. I am wondering about fuel pressure? I have the 24 lbs SVO injectors set at 50 psi. Is this important? I don't seem to have any vacuum problems as i just put the whole intake and higher back toghether with new everthing.
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'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money

 

How did you make out with all of this?

 

I can't remember anything after about a month but 7 years???????