Skip the auto shop - Our mechanics make house calls

Q: My car won't go up steep hills

asked by on

My vehicle won't go up a steep hill. If i try it stops and starts to smell like gas. I have changed the spark plugs and put in a new air filter. I have also changed 7 of the 8 ignition coils. What do you recommend?
My car has an automatic transmission.

A: Hello. Going up a hill is considered "...

Hello. Going up a hill is considered "extra load" on the engine. Issues with handling this extra load are typically due to poor engine performance. Starting with the spark plugs was a good idea. When you change the ignition coils, always change all of them. Have you preformed a fuel pressure test? You may have too much, or too little fuel being pumped into the cylinders. Inspecting your pump, filter, and injectors would all be a good idea. Although no engine warning lights have illuminated, the computer may still have codes set that will help with diagnostics. Specifically if there is a sensor or electrical issue. You may want to have the vehicle scanned, which can be done at most auto parts stores.

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: Engine noise when cranking. P0011 and P0021 codes

Hi there. The P0011 OBD-II error code indicates that you have an over advanced timing issue, which might be the reason why your engine stumbles for a brief moment when it's cold and first starts. Ignition timing is typically monitored...

Q: Either the oil pump or oil sending unit is going bad. I don't know which one.

Hello, If you are able to ear noticeable lifter noise or other valve train noise, it is quite likely your oil pressure gauge may be correct and that your oil pump may be failing or you are just low on...

Q: Crank bit won't turn over

This suggests you may have a fuel supply issue if you have confirmed that you do have spark. Try pulling one of the spark plugs out after cranking it to see if it is wet with fuel. If it is...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.