Skip the auto shop - Our mechanics make house calls

Q: poor acceleration going uphill

asked by on

I have a suzuki grand vitara 2001 the problem is it started to have poor acceleration going uphill I replaced the sparking plugs but the problem still exist can you please tell me what could it be? thank you
My car has an automatic transmission.

When a vehicle runs well in all situations but under load (such as climbing a hill), this can be a tricky thing to diagnose. The easiest and first thing I would be testing is the fuel pressure. Specifically, I would tape a fuel pressure gauge to the windshield and drive it up a hill to see what the fuel pressure does in a high load situation. During these times more fuel is required to produce more power. Often times, this results from a plugged fuel filter. This is a maintenance item that should be replaced on a regular schedule.

If fuel pressure is good, I would be looking at camshaft timing. This symptom is quite complicated so I would recommend having a certified mechanic inspect your acceleration firsthand to pinpoint the problem.

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

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: My car wont start and i dont know why

I would first at least determine the source of the cooling leak to make sure it is not in the head gasket area, or other troublesome area to repair, because if it is that repair (of the leak) has to...

Q: Rpm tachometer installation doubts

Unless you can find a tachometer that can be used with a 3 cylinder engine then if you tried to install tachometer set to 6 cylinders will give you an RPM reading half as high of what your engine is...

Q: I have a 2002 Ford Escape 3.0L V-6. I just bought this vehicle a few weeks ago and i do not know what oil they have ran in it, 5w-

Your vehicle requires 5W-20 engine oil. If you suspect that the wrong viscosity is currently in use, YourMechanic can [change the oil and filter]https://www.yourmechanic.com/services/change-oil-and-filter). Oil pressure can be verified using an external gauge. If the measured oil pressure does meet...

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...
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...
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...