hanging rpm

  1. L

    Engine Rough Idle at Start, Possible CMCV Vacuum Leak

    Hi, I have a 2015 salvaged coyote in a 67 mustang running on the control pack. Everything is up and running, but it seems to have a rough idle at start. The idle continues to be rough until I rev the engine and it settles down to normal at around 1000rpm for about 5 seconds, after 5 seconds...
  2. N

    Engine 1987 LX 5.0 5 Speed - idle and . . .

    Hello all. This is my first post on this forum. I thank you in advance for the time and consideration you give to my issue. So, I just picked up a 1987 Ford Mustang LX 5.0, hatchback, 5 speed, all original, 100% stock, 27k miles. The thing looks like it was buried in an air tight time...
  3. Tk469

    Hanging rpms....still

    99 Gt. Bought the car from my son a few days ago. He "never noticed" that it increases rpm when you clutch/shift. Goes to 2k then very slowly drops. Replaced iac, cleaned maf, cleaned throttle body (professional products powerflow air inlet, bbk power plus TB 70mm) installed hose clamps on all...