DMcV
Registered User
We had some snow a few days ago, went to use 4x4 and it wouldn't engage.
So today I did some research (online) to find it may be my electric Vacuum Pump.
Test = change heater settings to see if air would blow from dash or floor other than defrost vents. Results = would not stay on dash or floor, it would change back and forth on it's own. I checked all hoses and found only one on the passenger side split at the hub conection. Repaired that now found there is little to none vacuum at the hubs, pulled the hose at the vacuum pump and found very little vac pressure there. Now vac pump runs continually but will stop if I put a finger over the inlet (on the pump).
Question should the vacuum pressure at the pump and hubs be quite noticeable ??.... or does it relay on the accumulation tank to provide enough vacuum ?? Please help.... I don't want to go and by a new vac pump unless it's another problem.
Thank you in advance.
Dennis
So today I did some research (online) to find it may be my electric Vacuum Pump.
Test = change heater settings to see if air would blow from dash or floor other than defrost vents. Results = would not stay on dash or floor, it would change back and forth on it's own. I checked all hoses and found only one on the passenger side split at the hub conection. Repaired that now found there is little to none vacuum at the hubs, pulled the hose at the vacuum pump and found very little vac pressure there. Now vac pump runs continually but will stop if I put a finger over the inlet (on the pump).
Question should the vacuum pressure at the pump and hubs be quite noticeable ??.... or does it relay on the accumulation tank to provide enough vacuum ?? Please help.... I don't want to go and by a new vac pump unless it's another problem.
Thank you in advance.
Dennis