Rpm and fuel

Asked by Sep 14, 2017 at 08:29 PM about the 2008 Chevrolet Cobalt LS

Question type: Maintenance & Repair

When my rpm gauge works,it jumps and drops and
my car hesitates. But when the rpm gauge
completely stops, my car runs fine. Any
suggestions?

1 Answer

15

Sounds to me like the wire for your tachometer (rpm gauge) has broken insulation somewhere along its path. In addition the wire strands are broken. When the ends of the wire make a connection, they brush against the grounded metal that cause then to break. When this ground happens, you loose spark because the tachometer runs off of your coil / distributor system. It could even be inside the tachometer as well. Try inspecting the wires that connect to the tachometer. Look for anywhere that it comes close to metal. Hope this helps

Your Answer

Chevrolet Cobalt Experts

  • #1
    lightGear
    Reputation
    1,180
  • #2
    munron
    Reputation
    1,080
  • #3
    dandyoun
    Reputation
    970
View All

Related Models For Sale

Used Honda Civic
349 Great Deals out of 3,893 listings starting at $1,495
Used Chevrolet Malibu
109 Great Deals out of 2,028 listings starting at $3,485
Used Ford Focus
108 Great Deals out of 2,952 listings starting at $1,095
Used Chevrolet Impala
114 Great Deals out of 1,113 listings starting at $996
Used Toyota Corolla
269 Great Deals out of 4,553 listings starting at $1,400
Used Ford Mustang
15 Great Deals out of 1,155 listings starting at $4,500
Used Honda Accord
89 Great Deals out of 1,108 listings starting at $750
Used Dodge Charger
80 Great Deals out of 800 listings starting at $2,298
Used Chevrolet Silverado 1500
183 Great Deals out of 11,620 listings starting at $1,700
Used Ford Fusion
187 Great Deals out of 2,109 listings starting at $1,695
Used Toyota Camry
110 Great Deals out of 2,540 listings starting at $2,000

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.