RrtyRckt

I own an '87 N/A and it's just started acting up, this is what I'm dealing with. I noticed it the otherday when I was getting off the ferries here on Vancouver Island. When barley touching the gas or at low rpm's my car makes this muffled kinda powerless rumble, its hard to explain. Anyways, once i increase the gas and up the revs a little its fine. I also notice it when sitting behinds someone on a hill or at a traffic light, while I'm waiting to go on the acceleration I get that same powerless muffle. So.........I don't have a clue what it is, I haven't tuned my car up in about 3 months so maybe thats it. Anyways, any help would be greatly appreciated


Thanks, shawn