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2003 Tahoe power loss

My 2003 Tahoe starts fine and the engine seems fine. Problem is that it starts to lose power and speed won't get above 25 mph no matter how much gas was given. It did not sputter or choke out not even when braking. Engine does not change speed or rpm during power loss as to be expected with braking. What could be wrong with it?

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  • Cars & Trucks Master
  • 975 Answers

If the exhaust note sounds like a jet engine ,loud hissing,the catalitic converter has plugged. Makes the symtom you are speaking of.

Posted on Nov 26, 2013

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6ya6ya
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Posted on Jan 02, 2017

ndguy2481
  • 251 Answers

SOURCE: engine power loss

Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). in this list u will find a answer to ur problem Shaun 2 Inspect Spark Plug Fouled, damaged or broken spark plug(s). 3 Inspect Fuel Filter Clogged or dirty fuel filter 4 Inspect Distributor Worn, loose or incorrectly adjusted distributor. 5 Inspect Distributor Cap Loose or cracked distributor cap 6 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. grey_line.gif 7 Inspect PCV Valve Plugged or damaged pcv valve. grey_line.gif 8 Inspect Air Filter Restricted or clogged air filter. grey_line.gif 9 Inspect Catalytic Converter Clogged, damaged, defective or faulty catalytic converter. grey_line.gif 10 Inspect Automatic Transmission Improperly adjusted kickdown cable adjustment or internal transmission problems. grey_line.gif 11 Inspect Fuel Pump Improperly functioning fuel pump or circuits. grey_line.gif 12 Inspect MAP Sensor Improperly connected or faulty m.a.p. sensor. grey_line.gif 13 Inspect Mass Air Flow Sensor Improperly connected or faulty mass air flow sensor. grey_line.gif 14 Inspect Throttle Position Sensor Faulty throttle position sensor or throttle position sensor circuit. grey_line.gif 15 Inspect Timing Specification Incorrectly adjusted engine timing. grey_line.gif 16 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. grey_line.gif

Posted on Nov 15, 2008

  • 37 Answers

SOURCE: Loss of Power at Freeway Speeds

Sounds like itr is not getting enough fuel. Try or check the fuel filter for dirt or water, and also check the fuel pump pressure to see if it meet factory specs.
Good Luck Jerry
jerry1938@hotmail.com

Posted on Dec 13, 2008

  • 15 Answers

SOURCE: 2003 Kia Spectra Loss of power during exceleration

Hi,
The air cleaner mighty be clogged causing insufficient air supply. That is why it runs fine on idle because less air is needed and when the engine demands for more air, there isn't enough.

Posted on Jan 31, 2009

jackiaria
  • 350 Answers

SOURCE: 2005 Ford Five Hundred engine sputtering

Dear anew32, Wed 2-11-2009 3:43am EST (USA)

Do you often run your gas tank to near empty?
If so.......
This sounds like it may be as simple as cleaning the water or gunk out of the gas tank which is what I always do 1st because it's easy and inexpensive.
If your fuel is contaminated with gunk, grime, water and/or bottom junk like rust this will cause stalling and rough riding!
Try spraying a can of starter fluid in the air intake and see if it runs! If it does, it's most likely bad fuel or clogged injectors so....
Fill the tank with High Test, Add some dry gas and a good fuel system cleaner or 2 or 3 and this should dissolve all the gunk and clean the injectors! Read & follow the cans' instruction carefully.
If this cures the problem never let your gas tank get below 1/4 and especially never run it to empty as this is when the gunk and/or water will enter the system!
Hope this helps!
Good Luck!
jack
c9d5d1a.jpg

Posted on Feb 11, 2009

  • 72 Answers

SOURCE: 2000 Ford Focus Sputtering / Speedometer Needle Jumping

It could be a spark plug, plug wire, or a coil. Sometimes thay break down intermittently. If it needs a tuneup, that would be the first thing to do.

Posted on Jun 20, 2009

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