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Vacuum Leaks
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Car Vacuum Leak Problems
Question: 1999 Dodge Ram 1500, mileage: 149,000. I can hear hissing noises
from it when I blip the throttle slightly which leads me to believe there is a nasty
air leak somewhere. What is likely to be the problem on this (Although there could
be may reasons.)? I can't find any technical info on the dual ram. I'd like to be
able to check and make sure that all the lines are correct placed, and find damaged
faulty components if any.
Answer: Toady's car engine intake manifold is complex including
idle air control motor, tuned intake runners, split plenum etc. Intake manifold
air velocity noise is normal. To check for a intake leaks scan PCM for sensor values
that are operating out of range. Ex: If you have a trouble code mass air flow sensor
and a oxygen sensor at the same time you could have a vacuum leak.
Question: 2001 Ford Escort, mileage: 111,000. I have
a vacuum leak coming from under my dashboard. Where my brake goes thru the
firewall into the booster. What could be causing the loss in pressure when
I apply my brakes?
Answer: The problem you described is probably caused by a power brake booster
diaphragm that has ruptured. Your power brake booster needs to be replaced
to repair problem.
Question: 1999 Ford Explorer, mileage: 107,000. I have noticed a
hissing sound coming from the fuel pressure regulator port located on the fitting
where several vacuum hoses connect to the intake manifold. This port has only
a cap on it, I replaced the cap but the hissing is still there. I can push
on the cap and the hissing is reduced but what can cause this?
Answer: Check the vacuum port hoses behind the port with the
cap, repair as needed.
Repair
Topics / Vacuum Leaks
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