20
votes
When I step on gas pedal, the engine revs up but there is no acceleration
This sounds like the classic symptoms of a slipping clutch.
The solution is to replace it or have it replaced. If it is a DMF (Dual Mass Flywheel - fitted to reduce vibration) type then it is usually ...
- 34.7k
14
votes
Why is my car losing power when accelerating?
This sounds very much as though your clutch is slipping. Essentially, the clutch plates aren't making strong contact and slip against each other under hard acceleration. Under gentle acceleration ...
- 1,432
9
votes
Accepted
Accelerator pedal stuck briefly - how to make sure it doesn't happen again?
There's 3 things you need to look at:
the accelerator pedal itself
the throttle cable
the throttle body
If you pop the hood, find your throttle body: it is between the air intake tube and the metal ...
- 12.2k
8
votes
Accepted
Why does the engine have lesser pulling strength when the fuel in the tank is lesser?
It sounds like you have a motorcycle with a carburetor with gravity fed fuel line. (i.e. Without a fuel pump of any sort). In those conditions I can see that there is a higher fuel pressure at the ...
- 6,569
7
votes
Accelerator pedal stuck briefly - how to make sure it doesn't happen again?
This is a well-worded, interesting, and valuable question. Unfortunately, not among the "gung ho risk taking" mechanics, I would not even guess at an answer without seeing the problem firsthand.
So ...
- 12.4k
7
votes
MAZDA 3 2006 (UK) - poor acceleration then takes off at 3250 revs
My gut says it's likely to related to either a dodgy throttle position sensor or a faulty air mass meter. Whilst it is reporting no errors, it's worth doing diagnosis such as resetting the throttle ...
- 23.4k
6
votes
What Accelerates a Vehicle With a CVT?
It is not strictly the increase in engine RPM that causes a vehicle to accelerate.
Newton's 2nd law of motion states:
In an inertial reference frame, the sum of the forces F on an object is equal ...
- 1,166
5
votes
Accepted
Rough idle + slow acceleration + engine dying after spark plug change
Probably not. Engines are pretty tough. But pull a plug before you drive anymore and check for mechanical damage. Pistons hitting plugs would not be good.
Also double check your plug wires and make ...
- 14.5k
5
votes
When I step on gas pedal, the engine revs up but there is no acceleration
While I agree it is probably a slipping clutch, before I had the cluth and pressure plate replaced I think you would want to have the clutch pedal cable checked to see if it is mis-adjusted. In some ...
- 91
5
votes
Accepted
Loud Knocking/Clicking While Turning Left
Two things come to mind:
Before you drive it any further, check the lug nuts all the way around to ensure they are tight. I've seen a lot of vehicles exhibiting what you are talking about have loose ...
- 160k
4
votes
Rough idle + slow acceleration + engine dying after spark plug change
Don't worry about engine damage. The main difference between these 2 spark plugs is the length, the one you used is shorter. That means 2 things:
the spark was not created in the best place, meaning ...
- 12.2k
4
votes
2001 honda civic won't go past 112 mph
The EEC in most cars has a speed limiter function that cuts fuel delivery to the engine past a certain speed.
- 1,169
3
votes
Difference between revving in park vs. accelerating in drive?
There aren't any additional sensors that are activated or inactivated when you are in Park or Drive. The ECU will manage the engine the best in can at all times based on sensor inputs.
Basically, ...
- 12.2k
3
votes
My Honda Shine gets auto accelerated?
Assuming what you are saying is that your engine goes to 4,000 RPM as soon as you start the engine, and increases as you ride...This sounds like your throttle is stuck, or is sticking.
NOTE: It is ...
- 9,005
3
votes
Accepted
Engine problem while accelerating
This is a well known problem. The clutch is slipping. The plates of the clutch are not gripping together correctly, as you accelerate, the plates move against each other.
If left alone, this will ...
- 1,432
3
votes
What could be causing a grinding noise when car accelerates quickly?
After arriving on the scene, first I established the scope of the problem and areas affected.
The noise did not happen if I reved up the engine rpm in park. so we can rule out a valve bearing or ...
- 318
3
votes
2007 Dodge Charger acceleration
Sounds like there are definitely issues with the car - the overheating is certainly something you need to get checked out ASAP. It could be a spurious reading from a failing sensor or other electrical ...
- 10.3k
3
votes
MAZDA 3 2006 (UK) - poor acceleration then takes off at 3250 revs
Remove the mass air sensor housing -- usually directly downwind from the air cleaner. Look inside and try to find the tiny insect body or other debris that has lodged itself between the two wires of ...
- 31
3
votes
Unable to accelerate after jump starting
The failure to accelerate sounds very much to me as though the car has gone into "limp home" mode.
This usually happens when the Engine Control Unit (ECU) detects a problem (or thinks it's detected a ...
- 10.3k
3
votes
White smoke coming from dash when I accelerate above 60 and steams up the windshield when I accelerate it up to 30 or 35 any advice would help thanks!
Your truck has a leak in the heater core. Engine coolant is circulated through the core to provide heat to the cab. Most vehicle heaters circulate coolant through the heater core even when the heater ...
- 3,667
2
votes
Slow acceleration when pressing hard on the gas
If you suspect the loose rocks may have caused this:
check the air intake for cracks and leaks (leaning out the mixture too much)
look at the steel fuel lines for kinks (poor fuel delivery)
inspect ...
- 12.2k
2
votes
Why is my car losing power when accelerating?
Slipping clutch by excessive wear. You need to change ideally the whole thing: pressure plate, disk and bearing. It could be oil leak but it would "burn" and eventually work, temporaly anyway.
- 3,346
2
votes
Scooter: Motor goes off when accelerating
It really sounds like your main jet is clogged. You can loosen the hose clamp holding the carburetor, then twist the carb a little to break it loose from the intake. Take pictures or tag all hoses ...
- 21
2
votes
Bigger/smaller tires
Contact patch is always the same size no matter what size the tire is and can be calculated by dividing vehicle weight by tire pressure. Going to a taller tire or a wider tire changes the shape of ...
- 21
2
votes
Bigger/smaller tires
Wider tires are only a benefit if you have been running out of traction. If you have been running out of traction, there are tires that offer an increased contact patch with the same size, like slick ...
- 12.2k
2
votes
Accepted
Acceleration practices and wear on automatic transmission
Automatic transmissions are not mechanically linked to the engine (unlike manual transmissions), they are linked by your transmission fluid only. That gives us 3 things to consider:
Gears: Since they ...
- 12.2k
2
votes
1995 Subaru impreza acceleration problem
This is typical of a fuel delivery issue. The only advice I could give you is test, exhaust back pressure, fuel pressure and intake vacuum. Make sure those numbers are correct.
If they are all within ...
- 3,343
2
votes
Accepted
06 Solstice - weird hesitation / bogging under heavy throttle
Solved!
Having cleaned the MAF, checked the O2 sensors, hunted all over for a vacuum leak (here's a hint - don't spray carb cleaner near a disconnected vacuum hose that's actually carrying positive ...
- 3,159
2
votes
What Accelerates a Vehicle With a CVT?
As it has been said before, the (continuous) changing of the (infinite) "gears" in CVT is what makes it accelerate.
Here's a video that explains visually the CVT.
The control unit will request a ...
- 1,006
2
votes
What Accelerates a Vehicle With a CVT?
Acceleration is primarily due to the changing ratio of the CVT (continuously variable transmission). Think of it as the inverse of the usually set up where you have a transmission with a number of ...
- 14.5k
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