Skip the auto shop - Our mechanics make house calls

Q: my 4runner has no power pulling hills?

asked by on

my 2000 Toyota 4 runner has no power when pulling hills. It gears down and starts to miss. we Have changed the fuel filter, fuel pump, EGR senser, O2 senser, muffler, and checked the engen pursure, air filter. oil, and oil filter still dose the same thing. It is not setting any codes eighter. THANK YOU MARSHA

My car has 168433 miles.
My car has an automatic transmission.

A: Hi Marsha. Has the timing belt been recentl...

Hi Marsha. Has the timing belt been recently serviced? If so, did the concern start after this service? The timing belt may be incorrectly set. However, if the timing belt has not been recently serviced there are other possible reasons for your concern. Using a scan tool that provides data, what is the airflow measurements at idle and when under loads? What is the short term and long term fuel trims? What does the throttle position sensor read at idle and under load? What are the readings from the O2 sensors? What are the transmission readings while under load going up hill? I could go on and on checking data searching for a lead for your concern. If a reading is out of normal specifications, that is where I would begin testing. For example, if the air flow meter is showing 5 grams/second while going uphill we know this reading is out of specification because it normally reads between 4 & 5 grams/second at idle and I would begin testing this circuit. And, if the transmission solenoids were indicating an upshift instead of a downshift, I would test this circuit for faults. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a car has no power inspection.

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・Save up to 30%

Get a quote

What others are asking

Q: The starter is out in my car

Hi there: There used to be a time where you could simply attach a battery cable directly from the battery to the starter to test the solenoid. However, with newer electrical sensors on vehicles, doing this can cause serious electrical...

Q: On slow moving traffic, when i release the brakes, the car has lags for half a second before take off... computer scan shows p2138

This code is related to a faulty throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of a vehicle. The sensor is usually located on the butterfly spindle/shaft so that it can...

Q: Rattle sounds undercarriage

There are countless potential causes for your noise. It could be anything from a loose heat shield, to a worn strut mount. I suggest you have a trained professional, such as one from YourMechanic, listen to your vehicle firsthand to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...