I'm looking for some help in sorting out the poor running of my 6. The car sputters and misses when accelerating under load. Most noticable at low rpm's. Car will actually shudder and may even backfire. What's more the backfire seems to be coming from the front of the car not the tailpipe. Car has a new fuel pump and coil and really hasn't run right since. Carbs were rebuilt 2 years ago however the car ran great between then and now. Only other thing I can say is it is revving high at warm idle (1200) and at cold choke it may go up to (2000).
Thanks.
Thanks.