95 s10 blazer 4.3 vortec vin w rough idle
10

Asked by Bird473 Jan 09, 2016 at 08:22 AM about the 1995 Chevrolet Blazer LS 4-Door RWD

Question type: Maintenance & Repair

I'm still working on my 95 s10 blazer 4.3 vortec vin
4 it is idling  rough & fouling  plugs with black Sutt
but is will rib up acts like the mass air flow sensor
but don't have one I changed the o2 & intake air
temperature sensor sometime it will level out do u
think it could  be egr r tps sensors no engine light
on  I Changed the map sensor knock sensor on
one side but not the driver side please help

1 Answer
60,385

Andrew answered 8 years ago

There is only one map and knock sensor... sounds like an internal fuel leak. Either the regulator is leaking or the lines inside the plenum going to the fuel injector spider is leaking, those lines are referred to as a nut kit. This can be tested for by checking fuel pressure and leak down rate. It shouldn't leak down much if any over 5 min. If you don't have a tester cycle the key a few times to allow the pump to run, turn it off and wait 2 min. The go behind the intake and press the Schrader valve on the fuel line, if no fuel comes out then your fuel pressure is leaking down. Take the upper intake off and look for clean spots, that's where the leak is. Everything should look dirty and black

3 people found this helpful.
Best Answer Mark helpful

Your Answer:

Related Questions

  • 95 s10 blazer 4.3 vortec vin w rough idle 1 Answer

    I'm still working on my 95 s10 blazer 4.3 vortec vin 4 it is idling rough & fouling plugs with black Sutt but is will rib up acts like the mass air flow sensor but don't have one I changed the o2...

    1995 Chevrolet Blazer LS 4-Door RWD

    -

    Maintenance & Repair

  • rough idle on 95 s10 blazer 4.3 vortec vin w 2 Answers

    Will a bad knock sensor cause rough idle & black smoke come out the tail pipe if u rib up the engine it dont have mass air flow sensor r crankshaft sensor it runs good when I first crank it after...

    1995 Chevrolet Blazer LS 4-Door RWD

    -

    Maintenance & Repair

  • repair on 95 s10 blazer 4.3 vortec vin w 1 Answer

    Truck will not stay running it is wetting the spark with gas but has 60 psi of fuel pressure has anyone had this problem please help me with this problem

    1995 Chevrolet Blazer LS 4-Door RWD

    -

    Maintenance & Repair

  • 2001 chevy blazer 4.3 W motor swap with 1998 s10 X Motor 1 Answer

    I have a 2001 blazer with a blown 4.3 W engine. Can a 4.3 X engine out of a 1998 s10 be put in its place?

    2001 Chevrolet Blazer LS 4-Door 4WD

    -

    Maintenance & Repair

  • 93 4.3 vortex s10 Blazer 11 Answers

    Got this did plugs and wires cap and button and retimed it because when I got it the timing was 180 out replaced the maf sensor and it ran and idled fine for about 15 min shut it off tightened the ...

    1993 Chevrolet Blazer 2-Door 4WD

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet Blazer Questions

CarGurus Experts

  • #1
    Andrew Olsen
    Reputation
    4,240
  • #2
    Rowefast
    Reputation
    3,540
  • #3
    yetilikesbeer
    Reputation
    2,410
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Tahoe
12 Great Deals out of 807 listings starting at $9,980
Used Jeep Grand Cherokee
137 Great Deals out of 3,677 listings starting at $5,555
Used Ford Explorer
62 Great Deals out of 2,025 listings starting at $6,990
Used Toyota RAV4
136 Great Deals out of 3,049 listings starting at $3,900
Used Jeep Wrangler
133 Great Deals out of 5,940 listings starting at $8,990
Used Toyota 4Runner
35 Great Deals out of 557 listings starting at $9,999
Used Honda CR-V
178 Great Deals out of 5,024 listings starting at $440

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.