This is kind of hard to explain without you feeling it, but basically the car shakes or rumbles when driving or sitting. You could also call it a shudder.
This happens at pretty much all speeds, but is less noticeable when going faster.
The RPM's don't change much, if at all when this happens.
It is very intermittent, but it has become a problem because I will try to floor the car to overcome this and all of the sudden the car will full send.
It also makes the car stall, again being very dangerous.
I have ran the car out of fuel about a dozen times now because the fuel gauge/full dash lights don't work.
The car will always start just fine which makes me think it is more serious than a bad fuel pump/clogged filter.
There are no engine lights on (they should work, they come on when the key is at acc).
The "Trac" orange light will come on sometimes (not to be confused with the "Trac Off" light that does not work) , but doesn't seem to correlate with the issue.
Apologies for the bad description, but it is really the best I can come up with.
Thanks for any help you can offer.