Skip the auto shop - Our mechanics make house calls

Q: The vehicle is experiencing a lack off power.

asked by on

G'day Robert, i drive a 1997 1FZ-FE FZJ80R 4.5L petrol Toyota Land cruiser,the vehicle is experiencing a lack of power and throttling between the RPM ranges of 2200-2800 only on hwy use, between 100 and 120 kms per hr in hwy gears.It's never had this problem before. It does not have an idle problem, pinging, stalling ,misfire or knocking problem. The timing is set at 7 degrees, The engine light does not appear at any stage . The parts that i have changed so far and are all genuine toyota parts, which i will list for you below. Spark Plugs,Ignition Leads,Air Flow Meter, Air Filter,Fuel Filter, Distributor .These parts where changed on the 18/11/2016. This vehicle has no oxygen sensor as the exhaust manifold has been changed with pacemaker extractors. The parts i haven't changed are> Throttle Position Sensor and Knock Sensors, Do you think these parts may be the problem ?

My car has 444400 miles.
My car has an automatic transmission.

A: Your throttle position sensor is a possibil...

Your throttle position sensor is a possibility if there is a spot along the sensor that is damaged. The vehicle data can be watched with a professional scan tool. As you sweep the throttle, you should see the voltage change at a steady pace. You may see the voltage reading drop out when the sensor pickup passes over the dead zones. Consider hiring an experienced technician like one from YourMechanic who can come out and take a closer look at the lack of power concern and offer a more personal diagnosis.

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: Check engine light on, lost engine power 2x, now get 5-6 mpg less..ideas?

You will need to have the engine computer scanned again to get the codes and then properly diagnose any codes that are received. Fuel evaporative codes may cause the truck to run richer than normal but should not cause the...

Q: Car won't unlock electronically, nor mechanically.

Hi there. What seem to have happen is the battery went dead over night. If there was no sign of power, then the battery drained with a parasitic load overnight. The ECM and the fuses are protected to keep water...

Q: Do I need to replace the lower O2 sensor or upper O2 sensor?

As you may know there are two O2 sensors in your vehicle, one that measures exhaust gases prior to entering the catalytic converter and one that measures the gases as they exit the converter. The purpose of the lower sensor...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...