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Tachometer jumping around

Milage gauge only reads in kilometers and while driving tachometer jumps around out of control

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Posted on Jan 02, 2017

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SOURCE: temp gauge fluctuates, fan comes on, car jumps in

there is air in the system

Posted on Aug 19, 2009

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1 Answer

Temperature and depth reading is bouncing around all over. Is that something I can fix???


Popular Mechanics - Jan 1961 - Page 139 - Google Books Result

https://books.google.com/books?id=XNsDAAAAMBAJ
Vol. 115, No. 1 - ‚ÄéMagazine
Right, plates of full depth and weight ... Loose hold-downs - bouncing arounddamages a battery several ways ... Excessive loads - using the starter to move thecar should be only a ... ask for a temperature-corrected hydrometer reading, which should be 1.260 specific gravity. ... All this is dependent on the individual car.

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Jan 23, 2016 | Cars & Trucks

1 Answer

What would cause temperature gauge bouncing ?


Sounds like the sending unit has an intermittent short to ground. Unhook the the wire from the sending unit, and see if the needle stops jumping around. If it quits jumping around, replace the sending unit. If it still jumps around, you have a bare spot somewhere on the wire and it is hitting ground which will cause the needle to jump. Cut out the bad part of the wire and splice in a new section. That should fix it.

Jul 20, 2014 | 1996 Buick Century

1 Answer

Temp gauge and blazer jumps around when driving


Vehicle temperature gauges (temp gauge) read the temperature of the liquid in cooling system. From what I understand, the temp gauge jumping around has since gone away after you placed water into the radiator. It is very possible that water converted into steam was trapped in the cooling system and reached the temp sensor in your engine. The vehicle moving caused this steam to shift around reflecting rapid changes in temperature on the sensor, causing the needle to jump around on your console.
Hope this helps.

Nov 06, 2013 | 2001 Chevrolet Blazer

2 Answers

I have a 1993 Jeep Cherokee. I just changed the oil and noticed ( hasn't happened before) the oil pressure gauge occasionally jumping around erratically up past the last line. I changed the oil filter...


the gauge should be at around 40 psi steady and higher at higher rpms,try using thicker oil if you have high milage ,if no change go ahead replace the oil pressure switch. hope this helps you please vote.

Apr 26, 2010 | 2000 Chevrolet S-10

1 Answer

99 cavalier - the fuel gauge doesnt read accurately and it jumps


Possibly a bad ground wire at the sender on the tank,

Check for that first before tearing into the dash to replace the guage.

Mar 31, 2010 | 1999 Chevrolet Cavalier

1 Answer

Gas gauge jumping around


Gas gauge jumping around usually implies fuel level sensor in tank is going bad...Usually if the gauge in dash is going bad will read empty or at various positions depending on fuel level in tank..Electrical short problem in gauge usually affects other gauges in cluster

Jan 06, 2010 | 1991 Dodge D150

2 Answers

03 gmc envoy with 5.3 140000 miles. Oil pressure reading fluxuates between 0 and 40. When problem first started pressure read 80. When vehicle was new it stayed at midpoint (40) vehicle has plenty of oil....


There may be a loose wire or the gauge or sending unit may be going bad. The first thing I would do is to hook up a temporary oil pressure gauge, not using the old one at all. With this watch gauge while driving and see what readings you get. If the readings still jump around you have a pump that is getting weak and failing, If that is the case the pump should be replaced, but with high milage you may consider rebuilding the entire engine. If the readings stay normal start checking for a loose wire at gauge or sender. Then check sender, then gauge and replace as needed.

Oct 02, 2009 | 2003 GMC Envoy Xl

1 Answer

Fuel gauge, odometer, tachometer problems


Check the ground wire, could be corroded.

Jul 18, 2009 | 2003 Toyota Camry

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