Have the fuel pressure checked. Low fuel pressure can result in poor performance. What was the trouble code retrieved?
March, 23, 2011 AT 7:18 PM
It said something about emmissions, not sure of code. Could the filter be the prolem before the pump.
March, 24, 2011 AT 1:37 PM
Unless the filter is badly clogged, otherwise it would only affect performance but not the rough idling. Get the code for me so I can understand if it is anything to do with the issues you are experiencing. National chain parts outlets provides free scanning services.