500 sec 1983mod.
 

Someone help me???MY 500 sec are going bad,specielly on low rpm... have test ignitasjon,its ok,,,some who know???:)Exuse my bad english:-) Engine are going badly...not going on every sylinder and very shaky.... little better when its bee warm but not good,It starting always and shaking much.

please repeat your question,with a little more detail...thanx

Yeah what do you mean "going bad"?
Gilly

i read it as the car is running very roughly on start up. after it is warm it is better but still running roughly. not on all cylinders.

stenne, do you push the throttle pedal down a bit on start up? if not try doing that. it is recommended at all times on these v8 equipped cars. it should help.

tom w

your intake manifold needs rebuilding.labour intensive job but parts are reasonable.

500sec
 

I thanks for help,some who knew more??:)