Very low boost on 2000 GTP
1,865

Asked by John Feb 18, 2017 at 03:56 PM about the Pontiac Grand Prix

Question type: Maintenance & Repair

My 2000 GTP rather suddenly will only produce very low supercharger boost. There are no computer codes and other than  the low boost problem it runs fine. It has 142,000 miles on it. The supercharger itself is not mechanically noisy, and the supercharger oil has been changed 3 times in its life. What controls the boost and how can I fix this problem??

1 Answer
1,865

John answered 7 years ago

I found that the "dump valve" was being held partially open at all times. Disconnected the vacuum actuator and soaked the damper actuator shaft where it enters the supercharger body with PB Blaster. Then I worked the shaft by hand until it regained its full range of motion with no sticking or drag. Reassembled linkage and took it out for a test run....... it works fine and comes up to full boost again.

3 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,150
  • #2
    james sparrow
    Reputation
    7,480
  • #3
    Dorian Hendricks
    Reputation
    6,030
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Impala
9 Great Deals out of 131 listings starting at $3,495
Used Pontiac Bonneville
1 listing
Used Pontiac Firebird
18 listings
Used Pontiac GTO
4 listings
Used Pontiac G8
1 listing
Used Chevrolet Monte Carlo
7 listings starting at $9,800
Used Pontiac Grand Am
2 listings
Used Chevrolet Corvette
27 Great Deals out of 782 listings starting at $15,900
Used Pontiac G6
19 listings starting at $3,990
Used Chevrolet Camaro
17 Great Deals out of 467 listings starting at $11,999
Used Ford Mustang
34 Great Deals out of 1,596 listings starting at $7,999
Used Dodge Charger
42 Great Deals out of 858 listings starting at $5,995
Used Buick Regal
20 listings starting at $6,395
Used Buick Lucerne
3 Great Deals out of 9 listings starting at $3,995
Used Chrysler 300
24 Great Deals out of 523 listings starting at $4,990

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.