When I plug in the temperature ascending unit, the motor speeds up. Unplug it, it slows back down. What could cause this?

Asked by Feb 12, 2015 at 05:22 AM about the Chevrolet Silverado 1500

Question type: Maintenance & Repair

7 Answers

80

Most temp. sensors that goes to engine computer determines if ecm is in open or closed loop. I think open loop is below 57 deg. F. you can check your sensor with scanner. should be within a couple degree's of actual engine temp. The colder the coolant sensor reading is the more fuel ecm gives engine. Just like the carburetor does with choke. Check your sensor reading and see what the reading is.

8,650

That would be engine coolant temperature sensor. ECT A temperature sending unit would operate the temperature gauge indicator.

70,995

Sounds like the sending unit is bad and telling the computer that the engine is cold when it's not. This will put it on fast idle. HTH. -Jim

8,650

The sending unit? or the ECT ? ECT sensor would be connected to affect runability, you must mean

80

Keeping it simple. first sentence says= sensor that goes to engine computer.

8,650

Right. I know that ukno, and ukno that I kno but do they kno?

70,995

Some vehicles use the same sensor for the computer and the gauge on the dash. HTH. -Jim

Your Answer

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 169,694 nationwide Silverado 1500 listings starting at $1,000.

ZIP:

Chevrolet Silverado 1500 Experts

  • #1
    John Carson
    Reputation
    2,660
  • #2
    Rowefast
    Reputation
    2,000
  • #3
    Silverado_owner_2006
    Reputation
    1,710
View All

Related Models For Sale

Used GMC Sierra 1500
1,016 Great Deals out of 66,359 listings starting at $2,495
Used Ford F-150
2,573 Great Deals out of 199,178 listings starting at $1,300
Used Chevrolet Silverado 2500HD
336 Great Deals out of 30,635 listings starting at $3,500
Used Dodge Ram 1500
367 Great Deals out of 10,819 listings starting at $1,500
Used Toyota Tundra
495 Great Deals out of 33,973 listings starting at $2,000
Used Toyota Tacoma
581 Great Deals out of 45,039 listings starting at $1,790
Used Ram 1500
1,017 Great Deals out of 110,728 listings starting at $6,900
Used Chevrolet Tahoe
730 Great Deals out of 41,715 listings starting at $1,995
Used Chevrolet Colorado
277 Great Deals out of 34,532 listings starting at $1,900
Used Ford F-250 Super Duty
331 Great Deals out of 45,895 listings starting at $1,700
Used Chevrolet Camaro
443 Great Deals out of 30,847 listings starting at $1,450
Used Chevrolet Silverado 1500HD
5 Great Deals out of 260 listings starting at $2,195
Used Chevrolet Silverado 2500
8 Great Deals out of 225 listings starting at $2,888
Used Nissan Titan
211 Great Deals out of 20,825 listings starting at $3,390
Used GMC Sierra 2500HD
110 Great Deals out of 13,923 listings starting at $2,999

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.