I just finished my 2.3 - 5.0 swap and first went carbed but it pissed me off so i finished installing the EFI last night and started her up. she started right up but my idle is all messed up. it goes up and down up and down from aroun 500- 1500 constantly and enetually if i idle long enough it dies. my previous car was carbed so i am not to good with this efi thing what should i check for, where could my problem be