Skip the auto shop - Our mechanics make house calls

Q: Hesitation when the 1999 Honda Civic Sedan goes downhill

asked by on

I have a 1999 Honda Civic Sedan. Just recently I noticed the car starts to hesitate when it goes downhill, while I'm pressing the gas. There's no throttle spins when the hill begins to smoothes out. What could it be?

A: Going downhill? That's interesting for ...

Going downhill? That's interesting for this. Normally, they get problems when you are going uphill. If it's hesitating going downhill and it's not doing it when it goes uphill, unfortunately on that, if you have automatic transmission, it can be a sigh of automatic transmission going out.

Because normally, you have throttle problem going uphill. That means that either the fuel pump is weak, the fuel injectors are not working. But going downhill there is less strain on the engine, and the only thing that I’ve ever really seen that did that, was the transmission going out.

Or, say if your fuel pump has a problem in the gas tank with the feed, and the rubber was rotting, and the gas starts to slash when you go downhill, it could be problem with the fuel pump. You might have that checked out too. Because the fuel pumps and when you move it, the gas slouches into one end or the other and if your pump system has a problem and it doesn't pick up right, it can do that. It can go one way or another or even on the left angle or the right angle.

A professional mechanic will be able to inspect your car's hesitation if you need assistance getting this repaired.

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: I was told replace either fuel pressure regulator the throttle positon sensor or the fuel strainer, due to ghost rev

It sounds like you are having some kind of fuel delivery problem. Since the fuel pump and the fuel pressure regulator work somewhat as a team in getting the fuel from the tank to the intake, I would recommend changing...

Q: Car wont stay running

Hi There, It sounds like you may have a dirty or faulty idle air control valve or potentially a bad fuel pressure regulator or fuel pump. The idle air control valve monitors the air intake as it is mixed with...

Q: How do you use the glove box?

The glove box is an ideal place to store things like your owner’s manual, insurance papers and other important documents or small items. It’s also easy to use. Here’s how: Make sure the glove box is unlocked. Pull the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.