Q: my car is hesitant to accelerate when changing down to second gear uphill and sometimes it just won't accelerate.

asked by on

My car just won't accelerate when going uphill, sometimes changing down to the second gear it still hesitate to accelerate. There's no engine light or what's so ever on the dash, I've changed the clutch kit on Thursday the 19th Jan 2017, and cleaned the TPS & MAF Sensor. The Fuel Pump was changed together with the it's filter and the O2 Sensor is also new. The last suspects are the injectors. I've literally changed all my sensor and also installed the new catalytic converter. I'm starting to worry that by the time I found out what the culprit is, I would have changed most engine components. The vehicle was even taken in for diagnosis, with hope that at least faults would be picked by the diagnostic machine. I'd really appreciate your advice. I thank you.

My car has 380000 miles.
My car has a manual transmission.

Hi there. What were the diagnostic results? What were the data readings from the ECM? What diagnostic process did you use to determine the other parts were in need of replacement? These are the questions that I ask anytime I am presented with a unique concern such as this one. Compare data reading to factory specs before replacing any parts; air flow meters can be presenting incorrect readings that are not considered faulty readings. The ECM will simply adjust fuel trim to compensate. Of course, the meter may not be changing the reading at all from idle; imagine how the ECM will react to increased throttle opening with an airflow reading that matches idle speed (lots of throttle and no air) or increased airflow without an increase in throttle position if the TPS is faulty (lots of air and no throttle). I 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 low power inspection.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. my car is hesitant to accelerate when changing down to second gear uphill and sometimes it just won't accelerate.

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: What is the correct driving posture for my car?

Driving safely requires that you have the right position and posture when you’re behind the wheel. Not sitting properly in the seat can limit your view, limit your control of the vehicle, and put you, your passengers and others on...

Q: Tips for sap removal?

The first thing to try since it is hardened is to use a hot soapy water solution. Have the water as hot as you can stand it without burning your hands. The hottest water can be poured onto the sap...

Q: Leaking radiator cap

Hello there: Most of the time, the smoke you see coming from the front of the vehicle that has a coolant leak from the radiator cap is steam. This is an indicator that the radiator cap needs to be replaced;...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...