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Questions tagged [acceleration]

The act of increasing speed over time.

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3
votes
3answers
1k views

Difference between revving in park vs. accelerating in drive?

More specifically, what additional parts/sensors/systems are active/activated when the car accelerates vs when you revving the engine in park? How does the electrical system differ between the two? If ...
8
votes
3answers
87k views

Rough Low Idle and Engine Shakes, Hesitation and Lack of Power

On a 98 Mazda 626 GF 2L I'm working on the engine seems to shake / wobble for about a second / second and a half when going to WOT from any starting rpm. It also almost sounded like maybe one of the ...
2
votes
0answers
532 views

Clicking noise when stopping and accelerating. AC issue?

I drive a 2014 Corolla LE. Whenever I accelerate or brake, I get a tap or a click from within the dashboard near the center vent area. It happens when... I accelerate from a stop. I just tap the ...
13
votes
2answers
2k views

Accelerator pedal stuck briefly - how to make sure it doesn't happen again?

While reversing into my drive the accelerator pedal briefly got stuck - luckily in the "up" position, not the "down" position, but given the hump in my drive that needs a little gas to get over, it ...
4
votes
1answer
4k views

Opel Corsa D engine issue?

I have a 2011 1.4 petrol Corsa D. When accelerating the car lurches. This doesn't happen all the time and is seemingly random. It may happen when I accelerate from 60 on the motorway back to 70 or 30 ...
1
vote
0answers
2k views

Nissan xtrail T32 manual gear box/transmission issue?

I have a new Nissan xTrail petrol T32, and have noticed two issues. When I change from 1st to 2nd and from 2nd to 3rd especially, it does not go as smoothly and effortlessly as the other cars I have ...
5
votes
0answers
1k views

1998 Nissan Sentra (automatic): Hard/No (Re)start, Intermittent Stalling, Jerky Acceleration

In an attempt to be as detailed and thorough as I could be in order to correctly and potentially definitively diagnose the issue(s) plaguing the vehicle in question, this post is very long. ...
5
votes
0answers
288 views

High acceleration and dying when brake is pressed [closed]

I have a 2003 Ford Taurus its been good, only needed a new starter and new brakes besides the standard service in the 6-7 yrs since I got it. TL;DR: High RPM in idle, need to ride brake to keep ...
2
votes
0answers
28 views

vehicle will only pull when in 4 low. its a5 speed. at first it just happened to reverse but now it's the forward gears too

My 4x4 5 speed s10 blazer will only go when it's in 4 low. When it first happened it was only reverse but now it's the forward gears too
2
votes
1answer
292 views

Which acceleration threshold for blinking brake light?

I would like to modify the third brake light of my car to add blinking when a strong deceleration is detected. What threshold should I set? given the basic rules of friction, the maximum possible ...
3
votes
1answer
239 views

1995 Subaru impreza acceleration problem

I recently brought a 95 Subaru impreza 1.6 ltr 5 speed manual. I put my foot down on accelerator and it spits and splutters. If i put my foot down slowly I can get up to speed, but once I'm at say 100 ...
4
votes
2answers
278 views

Given the following scenario, what type of engine (diesel or petrol) allows for greater acceleration and/or top speed?

I know this isn't exactly a Motor Vehicle Maintenance & Repair related question but this seems the most appropriate StackExchange community to ask it. I apologize if I am being wrong in my ...
6
votes
2answers
11k views

Rough idle + slow acceleration + engine dying after spark plug change

I recently changed the spark plugs and wires on my 2002 Ford Focus SE with Zetec (DOHC) engine. I used NGK TR5IX (7397-4PK) Iridium IX plugs and Motorcraft wires. When I received the plugs, they were ...
4
votes
1answer
2k views

Acceleration practices and wear on automatic transmission

Does a driver's acceleration practices substantially influence the wear on a car's automatic transmission? If a driver accelerates with a RPM > 3500 from stop, is this any "easier" on the automatic ...
7
votes
1answer
844 views

Slow acceleration when pressing hard on the gas

I have a 99'chevy camaro z28. It has been accelerating very slowly and eventually dying on me. I've changed the battery, spark plugs and the fuel filter. It manages to turn on and stay on fine. It has ...
5
votes
2answers
4k views

Why is my car losing power when accelerating?

I have Skoda Fabia 2002 with manual gear and over the past few days I find the car losing power when accelerating fast. When I push gas pedal to accelerate quickly (in any gear) I hear the engine ...
5
votes
2answers
922 views

Bigger/smaller tires

On a track, bigger tires have more contact therefore more traction. However, it comes at a cost of more unsprung weight. Therefore, the 0-60 time is slower as tested by Car And Driver. This was tested ...
4
votes
1answer
122 views

Why does the engine have lesser pulling strength when the fuel in the tank is lesser?

I've noticed a difference that when the fuel in the tank is low, it takes a bit more time for the bike to accelerate to a higher speed than if the fuel tank is mid level or full. Same thing said by a ...
1
vote
0answers
46 views

Opel Meriva 2009 - Clicking noise

I have Opel Meriva 2009 model. It produces clicking noise while accelerating above 100km/hr. When I drive in lesser speed no noise. Also, no noise while accelerating in idle or braking. Could you ...
2
votes
1answer
5k views

Ticking noise during acceleration

I have a 98 Tahoe with 150,000 miles. When I accelerate from a dead stop I hear a ticking noise from under the vehicle. It is not present when idling or deccelerating. If I accelerate slowly the ...
7
votes
1answer
2k views

Warm fuel injected engine stutters when accelerating

I have a 1994 Honda Concerto 1.5l gasoline car, fuel injected. When the engine is cold there are no accleration problems. But once it warms up it stutters if I step hard on the gas. When it does ...
6
votes
1answer
791 views

Accelerator pedal goes to the floor sporadically while driving

One of my cars is a 1987 Chrysler LeBaron GTS, which originally belonged to my mother, and has only 30,000 miles on it. Occasionally, the accelerator pedal will go to the floor. (My mother took ...
3
votes
1answer
185 views

Maintains speed when I let off the gas

My 02 impala is either maintaining or picks up speed after I let off the gas pedal. It's almost acting like the cruise control in on, so I pulled the fuse to the cruise. The problem stopped for a week ...
6
votes
3answers
1k views

Optimal acceleration for automatic transmission? [closed]

In a car with automatic transmission, what's the best way to accelerate so as to minimize fuel consumption? Assume I'm not going to change the gears manually. Note that I'm also considering non-flat ...
5
votes
2answers
338 views

Varying acceleration while riding

My motorcycle, a KTM Duke 200, while riding is producing varying acceleration. This is during a single ride. For about a few minutes, the acceleration is alright, then after a few minutes, the ...
2
votes
2answers
112 views

My Toyota fails under full throttle but not when feathered

My car is a Toyota MK4 NA Supra and it has a problem I don't understand. When I push the throttle gently, whether in park or in drive, it gradually builds revs and moves but when I push it hard i.e ...
2
votes
0answers
272 views

What actually is brake horsepower (BHP)? [duplicate]

I know that BHP is the measure of power of an engine. I realised that I have no idea how the number (for example 540 BHP) relates to the engine itself. Does 1 HP mean one rotation of the crankshaft ...
5
votes
1answer
144 views

Acceleration pickup of a car

When I say "Tata Winger can accelerate from 0 to 100 Kmph in nearly 19 to 20 seconds, which is quite good for this class" - how is it measured? Is this by accelerating the car from 0 to 100 kmph on a ...
5
votes
1answer
19k views

Does using the entire rev range of a car damage it?

On my standard 2000 1.2 Opel Agila, I often have to get to about 5000RPM to join a fast road on a steep (1 in 10) hill, as it is gutless on hills. I have to do this almost every day, and I have ...
4
votes
1answer
518 views

2004 Ford Explorer accelerates too quickly from idle

I have a 2004 Explorer/v8/4wd/bauer edition. When I take off from a stop, there is a slight lag and then the vehicle over accelerates (sort of "jumps" off the line). If I gradually apply the ...
4
votes
0answers
3k views

Acceleration problem, but only immediately after stopping

Symptoms: The following applies mainly when accelerating from zero speed at 1st gear in RPM below 2500. Above that RPM range, there is no problem (then acceleration is assisted by turbo-compressor). ...
2
votes
2answers
2k views

Can trouble codes P2138 & P2279 be related for a 2005 Honda Pilot?

My 2005 Honda Pilot is having an issue where it loses power and the check engine light and several other lights appear at the same time. If I were to stop the car and cut it off and back on it will ...
4
votes
1answer
142 views

Is there a car black box to help solve the mystery of Sudden Unintended Acceleration?

Drivers blame the car while car makers blame the drivers. Dozens already killed and still no clear answer to what went wrong. It seems black boxes do not sense pedal action but are installed only to ...
1
vote
1answer
1k views

How Does a Stuck Purge Solenoid Cause Problems

In the WSM for my car, it lists "purge solenoid valve malfunction" as a cause of both a low idle with excessive shaking and loss of power during acceleration. I'm wondering the exact mechanism / why /...
3
votes
1answer
333 views

2015 VW Golf TSI Standard accelerating automatically

The car keeps accelerating after shifting to 3rd/4th gear at random times. I would shift, take my foot off the pedal and the speed would, in one occasion, accelerate to 40kmh and maintain speed. The ...
2
votes
1answer
345 views

Acceleration and engine issues

So I have a manual 02 Chevy Cavalier with 147000 miles 2.2L. I have been noticing that when I fully step on the gas I get zero acceleration. It gets even worse when I'm in either 4th or 5th gear after ...
6
votes
1answer
1k views

What could be the result of this missing o-ring?

Consider this o-ring : And this full diagram if you need a more global view : For completeness sake, here are the real parts : Where the o-ring goes : Where the little hole leads : The other end ...
2
votes
1answer
845 views

VW Passat 2.8 4motion b5 - Lack of Acceleration

Driving home car is working normally, driving at a constant speed then out of the blue heard a small thud then a rumble, after that the car had a problem where the acceleration was weak. Approaching ...
1
vote
1answer
1k views

What can possibly cause acceleration problem in a car?

I've a 2007 Honda civic (automatic transmission). I had to replace the starter in the car couple of days ago. After the replacement, I feel like I have to press the gas more than before to expect ...
3
votes
1answer
702 views

97 Sentra Slow Acceleration?

I just recently bought a 97 Sentra with less than 15k on it. I have never driven a Sentra before, so I'm not even sure if there is a problem. There doesn't seem to be a whole lot of power and I have ...
2
votes
0answers
291 views

2005 Chevy Aveo doesn't acclerate over 60 mph [closed]

This problem just begin yesterday. It's doesn't go past 60 mph and I don't know what's wrong. Can someone please answer this please?
2
votes
1answer
2k views

2004 LEXUS GX470

I have a 2004 Lexus GX470. I am having this problem where as I accelerate, my RPM goes up to like 5/6 and my speed is not going up. If I back off the pedal and try again it sometimes will accelerate....
3
votes
0answers
801 views

accelerating noise while the car is parked- VW GOLF

I have a 2005 VW Golf, automatic. Today after I parked the car a very loud accelerating sound came out of the engine, it sounded like I had pressed the pedal all the way down but I had not, I cannot ...