A/c

[REDDOGG.XJ]

WHEN IN A HARD PULL, SAY A LONG HILL OR PASSING THE AIR FROM THE VENTS ALL BUT QUITS BLOWING. SEEMS LIKE A VACCUM PROBLEM.

HAS ANYONE ELSE HAD THIS PROBLEM?

THANKS,
REDDOGG.XJ :confused:

[RichP]

You are on the right track, I think you will find it shifts to the defroster vents, this is from lack of vacum. either leaky hoses or leaky cannister behind the front bumper.

[REDDOGG.XJ]

A PLACE TO START.

THANKS,
REDDOGG.XJ;)

[RichP]

Pay particular attention to the vacum hose that goes under the battery to the vac res behind the bumper, battery splooge usually eats thru it.

[MJR]

If the grades are real long and it changes gradually then it's normal. The problem is the vacumn check valve only works when there is a sudden change in throttle so if it is long and gradual then it doesn't close allowing the vacumn to bleed down.