1500 96 4.8 eng idles fast

Asked by Mar 01, 2014 at 11:01 PM about the 1999 Chevrolet Silverado 1500 STD Standard Cab LB

Question type: Maintenance & Repair

i have replaced idle air c, manifold af, ect, cool temp senor, vss, egr, throtles position s,
does not show a code  idle speed 1300  to 1800 rpm! need help?

3 Answers

116,505

Possible vacuum leak. Have you checked your pcv? If it's stuck open could possibly cause this issue.

105,385

I agree with dandy about the vacuum leak. After you have checked for a vacuum leak you might try to reset the ECM and then drive it as normal so it can relearn.

60

Check the gasket at the base of the throttle body and try some spray intake cleaner on the butter fly in behind the air intake.

Your Answer

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 174,502 nationwide Silverado 1500 listings starting at $955.

ZIP:

Chevrolet Silverado 1500 Experts

  • #1
    John Carson
    Reputation
    2,770
  • #2
    Rowefast
    Reputation
    2,080
  • #3
    Andrew Olsen
    Reputation
    1,810
View All

Related Models For Sale

Used GMC Sierra 1500
1,190 Great Deals out of 64,579 listings starting at $999
Used Ford F-150
3,264 Great Deals out of 221,641 listings starting at $1,200
Used Dodge Ram 1500
431 Great Deals out of 11,124 listings starting at $1,495
Used Toyota Tundra
690 Great Deals out of 34,300 listings starting at $1,500
Used Toyota Tacoma
705 Great Deals out of 45,624 listings starting at $1,000
Used Chevrolet Tahoe
785 Great Deals out of 42,001 listings starting at $1,987
Used Ford F-250 Super Duty
392 Great Deals out of 49,100 listings starting at $1,899
Used Chevrolet Camaro
458 Great Deals out of 31,607 listings starting at $1,450
Used Ford Mustang
590 Great Deals out of 39,474 listings starting at $1,895
Used Chevrolet Silverado 2500
10 Great Deals out of 238 listings starting at $3,995

Used Cars For Sale

2018 Chevrolet Silverado 1500 For Sale
21 Great Deals out of 84,444 listings starting at $21,719
2017 Chevrolet Silverado 1500 For Sale
215 Great Deals out of 28,096 listings starting at $16,394
2016 Chevrolet Silverado 1500 For Sale
251 Great Deals out of 6,937 listings starting at $14,997
2015 Chevrolet Silverado 1500 For Sale
504 Great Deals out of 11,974 listings starting at $12,510
2014 Chevrolet Silverado 1500 For Sale
462 Great Deals out of 12,294 listings starting at $9,900

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.