How can I test for a faulty oil pressure sending unit

Asked by Dec 19, 2014 at 01:41 PM about the 2002 Chevrolet Blazer 2 Door LS

Question type: Maintenance & Repair

I have been banging my head for the past few months - replaced the fuel pump/wire pig
tail with AC Delco ( and new fuel filter ).  Worked for a few weeks - then no
pressure/juice to pump.  Dropped the tank/reinstalled pump ( just in case there was a
short somewhere ) - worked for a few weeks then no pressure/no juice to pump.  My
questions is this - would a failing / faulty oil pressure sending unit cause kill the power
to the pump and how would I know if this is the problem.  is there a way to test this
before removing the distributor cap / replace unit.  One other tid bit / I have noticed
while running the oil pressure fluctuates quite a bit at idle after the engine warms up  /
sometimes dropping low enough to almost stall..   Any ideas ./ advice?

1 Answer

19,245

It would kill the power to the pump. See if the pump is getting power

Your Answer

Chevrolet Blazer Experts

  • #1
    Andrew Olsen
    Reputation
    2,030
  • #2
    yetilikesbeer
    Reputation
    1,350
  • #3
    Rowefast
    Reputation
    1,030
View All

Related Models For Sale

Used Chevrolet Tahoe
665 Great Deals out of 39,392 listings starting at $1,000
Used Chevrolet TrailBlazer
88 Great Deals out of 4,567 listings starting at $1,475
Used Chevrolet S-10
8 Great Deals out of 1,217 listings starting at $2,500
Used GMC Jimmy
238 listings starting at $1,950
Used Chevrolet Silverado 1500
2,146 Great Deals out of 167,073 listings starting at $1,498
Used Jeep Grand Cherokee
899 Great Deals out of 70,389 listings starting at $1,045
Used Chevrolet Suburban
331 Great Deals out of 21,730 listings starting at $1,900
Used Ford F-150
2,316 Great Deals out of 182,093 listings starting at $1,000
Used Ford Explorer
835 Great Deals out of 63,128 listings starting at $1,000
Used Chevrolet Camaro
411 Great Deals out of 30,658 listings starting at $3,550
Used Jeep Wrangler
292 Great Deals out of 16,176 listings starting at $2,500
Used GMC Yukon
407 Great Deals out of 21,296 listings starting at $1,495

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.