At low throttle angles and cruising, my car experiences surging. Not enough to see on the stock tach but I imagine that it is rapidly accelerating 200RPM and then dropping, when it should be holding steady. I had this problem before I swapped the engine too! Only things that are the same are the distributer, exhaust mani, fuel pump etc. It's a different trans.

It also stumbles a little bit at idle and once in a while it will stall when coming to a quick stop. But otherwise the engine is very strong with excellent compression across the four cylinders.

 

bump

 

No one can help? Im the only one who has ever had this problem? IM DOOMED!

 

you should check the throttle body idle valve...
it's the valve that goes thru the throtle body, it's where anti-freeze enters the throttle body... i can't explain it... i could just fix it...
you should of searched or something...