Originally Posted by digieditny

Barry. Very interesting! This is news to me. My car does have a cigar hose though. The problem has been there since I have acquired the car. I will try everything you've mentioned! Looks like it's going to rain so I'll have to try later.

Funola. Would I need to buy the whole assembly or just the pump?

I would say it only happens when the tank is 1/2 empty or less. Never when it's full. But I would also say that it doesn't always happen. Sometimes The rough idle goes away and sometimes it gets really really bad (have to switch it to neural and accelerate to keep it alive) but ALWAYS happens when the tank is 1/2 empty or less.

There's no vacuum that I can tell. No swoosh. The car came with the style of fuel cap that clicks when you close it (attached). Doesn't feel air tight. Is it suppose to be?

Here something else that might be a clue to the problem or maybe it's a symptom of something else. I completely forgot about this... If you look at the area I circled on picture 2, that's usually filled with diesel slime (not sure what else to call it). It's not there now because I cleaned it yesterday. It's always there after I drive the car about half a tank. I find myself cleaning that area a couple times a month (I don't drive much). Maybe it's related?


I apologize in advance for my rookie questions...