Car Over Revs when changing gear

[JeNvEy]

Hi, i have a Ford Fiesta (P registration) and every time i change gear the car over revs. It isn't me causing it because it happens after like 10 minutes ive taken it out.

 

I dont no whats causing to over rev, im thinking its something to do with the clutch, perhaps its wearing out.

 

Help would be great thanks

[Starion]

I'm no professional, but it sounds like the clutch is slipping due to wear. I say take it to a garage and get the clutch checked properly, and maybe to get a quote on a new clutch for it if it is worn.

[-slash]

Well as long as you're sure it's not you're puting the clutch in too early or leaving the accelerator slightly on I'd say that the throttle is sticking.

 

The clutch should only really slip under load because with the clutch in you're disengaging the plate from the flywheel so it has no contact with the engine whatsover.

 

The revs of the engine are controlled by your speed and the gear ratios, so when you accelerate, if the clutch slips, the engine loses it's grip on the drivetrain and the flywheel spins more easily, hence the revs increase.

 

So really the only thing that can make the engine work harder is the throttle, or gearing down. Otherwise what you guys are saying is that the clutch is grabbing the engine and forcefully spinning it harder.

 

 

 

Unless I've completely misunderstood what the problem is?

[carobsessedfreak]

Or get rid of the fiesta...

[Mark]

Does it pull away as quickly as it used to? I know Kas have clutch issues, not sure on Fessies.

[fuckindumass]

It's probably slipping all the time, and just gets more noticeable when it gets hot and slips more. Most likely the clutch disc is worn down to the rivets and is carving grooves into the flywheel and/or pressure plate. Could be the pressure plate has worn out springs or maybe even broken springs. Could (unlikely) be the clutch disc has become contaminated with oil if the rear main seal is seeping. Or maybe the dual turbos and nitrous you've installed is overpowering the clutch assembly when the hoops grab. Anyway, you'll soon need a new clutch. Get an estimate on replacement disc, plate, throwout bearing, pilot bushing and flywheel resurfacing. If the rivets are scoring the flywheel, or you're overheating it with slippage, it may not be reusable. Don't they sell cans of 'clutch-fixer-upper' at the parts store?

[stretch.]

There are loads of diifferent faults possible. does it have an erratic idle?

 

Is it a 1.25?

 

when was its last service?

[JeNvEy]

Thanks for all your comments. I think its the clutch slipping, it cant be serious because it had an MOT about 2 to 3 weeks ago and a service but this happened after the service which is just my luck.

 

Thanks again

 

 

[-slash]

You didn't even bother to read my post did you.

[stretch.]

Nope he didn't

 

My moneys on a bum ecu map, or a lambada o2 sensor throwing in a lack of o2 on the readings causing it to suck like crazy and bang bigger compression explosion causing resulting revs.

 

Or the magic fairies, which are bastards.

[JeNvEy]

You didn't even bother to read my post did you.

Yeah i did read it, most people have been saying the same as you and ive asked family and friends and they say its most probably the clutch slipping.

 

Im no expert on cars btw

[stretch.]

-slash pointed out it most likely wasn't the clutch.

 

A clutch doesn't control the revs of the engine, just the connection between the engine and the gearbox/driveshafts.

 

So if it's over revving when the clutch is depressed, it's more likely to be a throttle problem.

[-slash]

-slash pointed out it most likely wasn't the clutch.

 

A clutch doesn't control the revs of the engine, just the connection between the engine and the gearbox/driveshafts.

 

So if it's over revving when the clutch is depressed, it's more likely to be a throttle problem.

Thanks stretch, at least someone listened.

 

 

f*ckingdumass, Jenvey, The only reason revs increase when a clutch slips, is because it generally happens when your foot is flat to the floor. This is because there is no longer any resistance on the engine because the drivetrain is no longer connected properly. And the drivetrain is connected to the entire weight of the car, so suddenly your engine doesn't have to work to move 1.5 tons of metal. Make sense?

 

Hence, the clutch slipping can in NO WAY increase the revs by itself. There needs to be throttle input. It's really very simple.

 

 

As I said before, if you're not granny shifting, my bet would be on your throttle sticking. My work ute used to do it.

 

 

 

But how about instead of coming on here you just take it to a mechanic?

[Suction Testicle Man]

Or he might be changing gear downwards.

 

But seriously slash, one does press the throttle in order to give the engine the extra strength to retain its revs, at which point the engine could be exerting added stength and the clutch slips under a slower rev. To me it honestly sounds like the clutch.. especially since it's a Ford.

[fuckindumass]

yeah, I didn't catch that he meant it revs during the change. Could be a lotta sh*t causing that.

[Rocketkiller]

Or he might be changing gear downwards.

 

But seriously slash, one does press the throttle in order to give the engine the extra strength to retain its revs, at which point the engine could be exerting added stength and the clutch slips under a slower rev. To me it honestly sounds like the clutch.. especially since it's a Ford.

How I understood it, the engine revs when he presses the clutch in, which means there's no way a bad clutch is causing it. When this starts happening, when happens when you rev it in neutral? Will it settle back to idle quickly or will it stay high? What I'm thinking is a sticky throttle linkage, so I would just spray the hell out of the linkage near the throttle body with some WD-40.

[JeNvEy]

-slash pointed out it most likely wasn't the clutch.

 

A clutch doesn't control the revs of the engine, just the connection between the engine and the gearbox/driveshafts.

 

So if it's over revving when the clutch is depressed, it's more likely to be a throttle problem.

Thanks stretch, at least someone listened.

 

 

f*ckingdumass, Jenvey, The only reason revs increase when a clutch slips, is because it generally happens when your foot is flat to the floor. This is because there is no longer any resistance on the engine because the drivetrain is no longer connected properly. And the drivetrain is connected to the entire weight of the car, so suddenly your engine doesn't have to work to move 1.5 tons of metal. Make sense?

 

Hence, the clutch slipping can in NO WAY increase the revs by itself. There needs to be throttle input. It's really very simple.

 

 

As I said before, if you're not granny shifting, my bet would be on your throttle sticking. My work ute used to do it.

 

 

 

But how about instead of coming on here you just take it to a mechanic?

Dumbasss? bit harsh dont you think, i just dont no alot of stuff about cars. But i get what stretch means and what you meen (kinda) lol. It makes more sense. And i am going to take it to the mechanic soon. Ive just paid for a service a week ago, problem was the issue happened after it. And im guessing its guna cost money to get it sorted out.

[Rocketkiller]

 

-slash pointed out it most likely wasn't the clutch.

 

A clutch doesn't control the revs of the engine, just the connection between the engine and the gearbox/driveshafts.

 

So if it's over revving when the clutch is depressed, it's more likely to be a throttle problem.

Thanks stretch, at least someone listened.

 

 

f*ckingdumass, Jenvey, The only reason revs increase when a clutch slips, is because it generally happens when your foot is flat to the floor. This is because there is no longer any resistance on the engine because the drivetrain is no longer connected properly. And the drivetrain is connected to the entire weight of the car, so suddenly your engine doesn't have to work to move 1.5 tons of metal. Make sense?

 

Hence, the clutch slipping can in NO WAY increase the revs by itself. There needs to be throttle input. It's really very simple.

 

 

As I said before, if you're not granny shifting, my bet would be on your throttle sticking. My work ute used to do it.

 

 

 

But how about instead of coming on here you just take it to a mechanic?

Dumbasss? bit harsh dont you think, i just dont no alot of stuff about cars. But i get what stretch means and what you meen (kinda) lol. It makes more sense. And i am going to take it to the mechanic soon. Ive just paid for a service a week ago, problem was the issue happened after it. And im guessing its guna cost money to get it sorted out.

He wasn't calling you a dumbass, he was referring to the user f*ckindumass.