I have a 1999 Chevrolet blaze 4.3 vortex engine, ran great, suddenly won't start, is getting spark & fuel, spark is strong, not sure of exact fuel pressure but it seems sufficient...

Asked by Dec 15, 2015 at 02:50 PM about the 1999 Chevrolet Blazer LS 4-Door 4WD

Question type: Maintenance & Repair

Was told it was knock sensor, also told it
was mass air flow sensor..

1 Answer

785

You need to know the fuel pressure. If the pressure is low the poppet valves of the injectors will not open. With key on engine off you need to see 60-66psi of fuel pressure. Check your filter and try again before you fail the fuel pump.

Your Answer

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
784 Great Deals out of 41,984 listings starting at $1,987
Used Chevrolet S-10
12 Great Deals out of 1,221 listings starting at $1,550
Used Chevrolet Silverado 1500
2,660 Great Deals out of 174,430 listings starting at $955
Used GMC Jimmy
210 listings starting at $2,500
Used Ford Explorer
1,225 Great Deals out of 69,461 listings starting at $1,000
Used Ford F-150
3,278 Great Deals out of 221,661 listings starting at $1,200
Used Jeep Grand Cherokee
1,049 Great Deals out of 72,190 listings starting at $1,195
Used Chevrolet C/K 1500
859 listings starting at $2,603
Used Chevrolet Camaro
456 Great Deals out of 31,600 listings starting at $1,450
Used Chevrolet Suburban
475 Great Deals out of 24,201 listings starting at $1,799
Used Toyota 4Runner
340 Great Deals out of 26,693 listings starting at $1,800
Used GMC Yukon
599 Great Deals out of 20,736 listings starting at $2,500

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.