[fanl]

Check Plugs and Wires, Clean EGR (carb cleaner) and check vacuum tubes.

 

[fanl]

buy an 3M carb cleaner ($5) take the egr valve off, its is very easy to do, and take all vacuum hoses off too, inspect for any leakage on hoses, and use carb cleaner on the egr where exhaust gases flow, not on the "pressure cam". You can use the carb cleaner on the holes of the exhaust and trottle body connect on the egr too...
its like play lego !! lol !

probably, after this your engine will be fine =] thats what i did on mine.

 

[fanl]

If you followed the correct procedure for timing, then I would say check the condition of the various hoses. Sometimes the ends get dry rotted and cracked. As for the EGR, don't use any cleaners in it as it will damage the diaphram. Generally, the tube leading from the exhaust to the EGR gets clogged with some really tough stuff. It's ok to take apart the EGR but there is a gasket that you should replace. You just want to make sure the diaphram moves freely. Good luck!

yes ! do not use any cleaner on DIAPHRAM.. just on down part of egr !