I have a problem with a 1994 Ford F150 125K miles 5L engine.
There is a problem with the Vac that runs the Panel door Vac Motor. It works OK when in idle...when I take off I lose vac to it and the instr panel register close. I put a vac guage on it and it registers 10 when in idle... under the hood there is a Vac check valve the has a red hose coming from the manifold and two black hoses on the output...one of these hoses go inside the cab.. the other goes to a fitting on the air cond housing under the hood...If I block the hose that goes to the air cond housing I get a reading of 20 inside the cab and everything works OK...
Do you have any idea what this other hose does? It seems to have some resistance when I blow thru it...
Could this be the cause?
There is a problem with the Vac that runs the Panel door Vac Motor. It works OK when in idle...when I take off I lose vac to it and the instr panel register close. I put a vac guage on it and it registers 10 when in idle... under the hood there is a Vac check valve the has a red hose coming from the manifold and two black hoses on the output...one of these hoses go inside the cab.. the other goes to a fitting on the air cond housing under the hood...If I block the hose that goes to the air cond housing I get a reading of 20 inside the cab and everything works OK...
Do you have any idea what this other hose does? It seems to have some resistance when I blow thru it...
Could this be the cause?
Jul 23, 2007 at 5:54 PM