Vacuum leak?

Asked by Skinnybikerdude Jan 16, 2017 at 05:35 PM about the 1996 Chevrolet C/K 1500 Silverado Extended Cab RWD

Question type: Maintenance & Repair

Having trouble when switching from vent to defrost
to floor. Any switching from one to another only
happens when I let off the pedal then I hear the
clunk when the doors move with a surge of
vacuum. It also idles rough but fine when driving.
Sometimes the engine surges after starting when
engine is still hot from normal driving. Once going
again it stops. Have replaced idle control sensor
with no change in symptoms. Gas vapor purge
system is all good.  Brake booster and vacuum line
good. Can't find a vacuum accumulator or any
other vacuum lines to inspect for damage. Any
help will appreciated.

1 Answer
35,335

lrodri911 answered 7 years ago

It does sound like a vacuum leak. Try spraying quick start around the intake manifold, you may have a leaky intake gasket or loose bolt. If it checks out good, disconnect one hose at a time from intake manifold instead of chasing hoses away from engine and see if you find the one feeding the problem area

4 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • Vacuum leak? 1 Answer

    Having trouble when switching from vent to defrost to floor. Any switching from one to another only happens when I let off the pedal then I hear the clunk when the doors move with a surge of vacuu...

    1996 Chevrolet C/K 1500 Silverado Extended Cab RWD

    -

    Maintenance & Repair

  • Oil Leak 2 Answers

    Just replaced oil filter adapter gasket and stopped my main oil leak, thought I was in the clear but noticed a small leak coming from front of motor. Looks like it is coming from the bottom of the c...

    1990 Chevrolet C/K 1500 Silverado Stepside 4WD

    -

    Maintenance & Repair

  • Oil leak bad 1 Answer

    I got a 96 Chevy Silverado 1500 with a 4.3 Vortec and I have a bad oil leak and I cannot figure out where the oil is coming from and my pressure in the radiator water pressure I guess you'd say is ...

    1996 Chevrolet C/K 1500 Silverado RWD

    -

    Maintenance & Repair

  • i have a chevy truck 1990 and it has no vacuum advance why 1 Answer

    i have a1990 chevy truck 4.3l and the vacuum advance dont work why

    Chevrolet C/K 1500

    -

    Maintenance & Repair

  • TBI gas leak 3 Answers

    So I was changing my oil earlier, got done, topped off fluids etc, fired her up and started looking/listening for anything that might need attention. Noticed a wet spot on the intake right behind th...

    1989 Chevrolet C/K 1500 Silverado RWD

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet C/K 1500 Questions

CarGurus Experts

  • #1
    Andrew Olsen
    Reputation
    15,950
  • #2
    Rowefast
    Reputation
    9,670
  • #3
    John Saffrahn
    Reputation
    6,480
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
128 Great Deals out of 7,142 listings starting at $3,950
Used Ford F-150
315 Great Deals out of 15,266 listings starting at $1,712
Used Chevrolet C/K 2500
1 listing
Used Chevrolet Camaro
12 Great Deals out of 312 listings starting at $9,499
Used Chevrolet Tahoe
20 Great Deals out of 924 listings starting at $11,900
Used Dodge RAM 1500
4 Great Deals out of 73 listings starting at $500
Used Chevrolet S-10
3 listings starting at $12,975
Used Chevrolet Corvette
30 Great Deals out of 1,057 listings starting at $15,871
Used Ford Mustang
64 Great Deals out of 1,285 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.