99 blazer missfire

Asked by Jul 02, 2016 at 03:02 PM about the 1999 Chevrolet Blazer LS 4-Door 4WD

Question type: Maintenance & Repair

New coil ignition control module  plugs wires distributor
maf iat ect throttle body iac tps fuel filter gaskets from
head up. New mfi conversion fuel pressure good
compression test good. P0300 only at idle mostly on #1
with small misfires on 4. 3 will misfire occasionally.
Sometimes 4 will misfire more than 1 and vise versa. Any
ideas. I also can't find any vacuum leaks

5 Answers

28,045

did you check for a bad cam lobe.../ vavle springs/pressures?

28,785

Maybe test the fuel injector circuit? http://www.autodiagnosticsandpublishing.com/feature/fuel-injector-testing.htm

Yes all injectors are getting power. How would I know about cam lobe or valve springs?

If you drive it it runs fine no issues no cel when I clear it. Watching my tech 2 only misfires at low rpms 800 and below and obviously idle.

Check the crank shaft sencer i had the same problem my engine wouldn't turn all the way over come to find out it was a easy fix

Your Answer

Blazer

Looking for a Used Blazer in your area?

CarGurus has 947 nationwide Blazer listings starting at $950.

ZIP:

Chevrolet Blazer Experts

  • #1
    Andrew Olsen
    Reputation
    2,110
  • #2
    yetilikesbeer
    Reputation
    1,400
  • #3
    Rowefast
    Reputation
    1,080
View All

Related Models For Sale

Used Chevrolet Tahoe
825 Great Deals out of 41,548 listings starting at $1,987
Used Chevrolet S-10
12 Great Deals out of 1,234 listings starting at $1,550
Used Chevrolet Silverado 1500
2,622 Great Deals out of 173,233 listings starting at $1,000
Used GMC Jimmy
196 listings starting at $2,500
Used Ford Explorer
1,200 Great Deals out of 68,629 listings starting at $750
Used Chevrolet Camaro
443 Great Deals out of 31,240 listings starting at $1,450
Used Ford F-150
3,178 Great Deals out of 218,644 listings starting at $1,200
Used Chevrolet C/K 1500
848 listings starting at $2,603
Used Jeep Grand Cherokee
1,057 Great Deals out of 71,468 listings starting at $1,195
Used GMC Yukon
590 Great Deals out of 20,734 listings starting at $2,695
Used Chevrolet Suburban
485 Great Deals out of 23,950 listings starting at $1,799
Used Toyota 4Runner
339 Great Deals out of 26,034 listings starting at $1,800

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.