Skip the auto shop - Our mechanics make house calls

Q: No power when hot. 1999 Chevrolet Tahoe

asked by on

1999 chevy tahoe 5.7l All new below- Throttle sensor Fuel pressure 60-65 New cap & rotor Plugs n wires Fuel filter Knock sensor

Only when hot I have no power. I have toi feather the gas just to move. At 65 on the high way if I go to pass as soon as it shifts down it bogs down and looses all speed and again I have to feather the gas to get going. Anything more than 5% of the pedal and it bogs down. Again only when its ran for awhile this occurs...While cold it runs perfect.

At a total loss now!!!

My car has 150000 miles.
My car has an automatic transmission.

A: Hi there, thanks for writing in about your ...

Hi there, thanks for writing in about your 1999 Chevrolet Tahoe. You mentioned you replaced the throttle sensor, but there are a few different sensors related to this. Assuming you replaced the throttle body sensor and not the throttle position sensor, I would suspect that what you are describing is related to the throttle position sensor. This relays info on the position of your foot on the pedal relative to how much fuel is being introduced into the throttle body. As your foot moves, the computer relays this info to the throttle body and just fuels needs accordingly. If you would like to have this looked at, a certified professional from YourMechanic can come to your car’s location to diagnose the vehicle’s loss of power and let you know what should be done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car sluggish after 40 MPH

The transmission seems to be slipping internally. The 3-4 clutches are most likely bad, causing the transmission to slip. The transmission would likely need to be overhauled or replaced. I recommend that you have a mechanic, like the ones from...

Q: Steering wheel gets stuck left, grinding noise - 2004 Dodge Ram 2500

Hello. It sounds like the steering gear box and/or the power steering pump is going bad. The steering gear box is what is allowing the wheels to turn left and right when using the steering wheel. There are gears and...

Q: Oil Leak

Hi there. In order to repair an oil leak, it has to first be identified. It can be as minor as a small oil line that needs replacing or a major issue such as a broken oil seal or gasket....

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...