can anyone give pointers as to running problem, when first started cold runs with low acceleration, but once the engine is warm and the engine has either stalled or swithched off and restarted the 'service engine light' has gone out and runs like it should. my fiero is a 2.8 v6 gt

When you first start it, does the check engine light stay on? Have you checked for codes?

yes, the service light stays on. i have checked codes and flases as normal code 12 i think

How is your idle at start up?
Is it steady and what rpm?
check codes again to be sure, If the check engine light is coming on after start up it should be setting a code.

i think i have found the problem. i removed the distributor cap and found that the tube which runs from the egr at the left hand side near the coil, around the cap to the plenum chamber nr the throttle housing, broken at the plenum end from its flange i positioned the pipe bak to its position and the car ran fine (only tempory) thus i can only think it is this which is evident.
thank you for trying to help.
now going to find a tube on the net.

jon m
england

That would do it. Sounds like you've got it.