I have a 2004 Pontiac Montana. The engine rattles on the left side when under acceleration. Sounds like a diesel. I cannot pinpoint the noise. Any ideas?

10

Asked by Nov 26, 2015 at 02:01 PM about the 2004 Pontiac Montana Base

Question type: Maintenance & Repair

3 Answers

79,235

Sounds like old fashioned pinging or denotation. Your knock sensor should be hearing this and retarding the ignition timing to stop the denotation. Most likely the knock sensor is bad. HTH. -Jim

10

I thought that might be the problem but there are no service-engine codes. Is it possible that a bad knock sensor would not trigger a code?

1 people found this helpful.
79,235

If the knock sensor is just not hearing the noise that could be the case. Try a higher grade of fuel at your next fill up. If the noise goes away then the knock sensor would definitely be my first suspect. HTH. -Jim

Your Answer:

Montana

Looking for a Used Montana in your area?

CarGurus has 165 nationwide Montana listings starting at $1,500.

ZIP:

Pontiac Montana Experts

  • #1
    Countrygal77
    Reputation
    2,200
  • #2
    Robert Reed
    Reputation
    1,590
  • #3
    Jim Space
    Reputation
    870
View All

Related Models For Sale

Used Pontiac Montana SV6
104 listings starting at $1,999
Used Dodge Grand Caravan
215 Great Deals out of 30,430 listings starting at $1,995
Used Chevrolet Venture
266 listings
Used Chevrolet Uplander
8 Great Deals out of 618 listings starting at $1,995
Used Toyota Sienna
258 Great Deals out of 23,222 listings starting at $2,490
Used Honda Odyssey
466 Great Deals out of 37,329 listings starting at $1,480
Used Hyundai Sonata
383 Great Deals out of 47,957 listings starting at $250
Used Chrysler Town & Country
193 Great Deals out of 12,932 listings starting at $2,350
Used Pontiac GTO
3 Great Deals out of 375 listings starting at $7,900
Used Toyota Tacoma
444 Great Deals out of 48,834 listings starting at $2,994
Used GMC Sierra 1500
757 Great Deals out of 61,528 listings starting at $1,395
Used Pontiac Grand Prix
11 Great Deals out of 1,761 listings starting at $800
Used Chevrolet Impala
442 Great Deals out of 25,964 listings starting at $950

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.