Uneven throttle

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Daiced
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Joined: Thu Mar 24, 2016 5:50 pm

Uneven throttle

Post by Daiced »

I've noticed that the reason to my car being so shaky some times is because my throttle is acting up. One thing that i can recreate is when i push the throttle to 1500 rpm and hold it there it goes up to 1500 rpm but then back down. And to get it to react i need too push it a bit further and then from there it's even. Or for example when i'm on the highway i have more acceleration with the throttle halfway than further down.( Don't know if that's really a problem.)

Is there anybody that has any ideas? I'm thinking of cleaning the throttle body or something like that.

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Capncol
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Re: Uneven throttle

Post by Capncol »

Any warning lights?
Throttle body suggests you have a petrol engine? If so, check for air leaks around inlet systen-listen for a hissing noise.
Cheers Col.


206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
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Daiced
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Joined: Thu Mar 24, 2016 5:50 pm

Re: Uneven throttle

Post by Daiced »

Capncol wrote:Any warning lights?
Throttle body suggests you have a petrol engine? If so, check for air leaks around inlet systen-listen for a hissing noise.

I had some warning lights when i bought the car but that's all taken car of and since i've cleared the codes none have showed up again. Well the engine is pretty loud and have a couple of weird noises. I'm not that good with an engine so if i uploaded a video would you or someone be able to hear the hissing noise?

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Capncol
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Re: Uneven throttle

Post by Capncol »

No. You need to listen around the pipework using something like a length of hose as a stethascope. We have had vidioed noises before on here and you just can't make anything out over the general din. Sorry.
What were the codes you had?
Cheers Col.


206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)

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Daiced
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Joined: Thu Mar 24, 2016 5:50 pm

Re: Uneven throttle

Post by Daiced »

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Capncol wrote:No. You need to listen around the pipework using something like a length of hose as a stethascope. We have had vidioed noises before on here and you just can't make anything out over the general din. Sorry.
What were the codes you had?
These were the codes that I had.
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Capncol
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Re: Uneven throttle

Post by Capncol »

Time for a new lambda by the look of it
Cheers Col.


206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)

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gazza82
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Re: Uneven throttle

Post by gazza82 »

Doesn't say whether pre or post cat though.

The crank sensor: was that replaced?

Problem with some obd code readers is they don't given you the full story on Pugs. What they say and what you have wrong may be different.

Check for leaks in exhaust too especially the flexi joint and manifold clamp.
Family Fleet: ex-Cayman Green 206 CC 2.0 LE, Indigo Blue 206 1.4 HDi Hatchback, Subaru BRZ Auto, Alfa Romeo MiTo

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Capncol
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Re: Uneven throttle

Post by Capncol »

That code will be pre.
Usually crank pos will give no start. Won't normally give hesitation but lambda will due to it's influence on fuel trim.
Cheers Col.


206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)

When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
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Daiced
Posts: 44
Joined: Thu Mar 24, 2016 5:50 pm

Re: Uneven throttle

Post by Daiced »

Capncol wrote:That code will be pre.
Usually crank pos will give no start. Won't normally give hesitation but lambda will due to it's influence on fuel trim.
As i mentioned i have already taken care of the codes by switching the lambda senor all errors were cleared. Although to add to my problem sometimes i still have the problem i had pre switching the lambda sensor, which is that the car starts and if i don't rev a bit extra it stalls and becomes a bit problematic to start again. It is less of a problem for me since it seems that it had to do with the weather and since it's getting warmer it has almost completely gone away.

But the problems that are left is the throttle and that the engine is pretty unnecessarily loud and has some weird noises. I'll link a video since all the different sounds can be heard. So if anybody has any ideas i'm willing to try anything. Since for some reason i can't post links just search "Peugeot 206 2005 loud engine + noises daniel daemi" on youtube and it'll the first video :)

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Capncol
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Re: Uneven throttle

Post by Capncol »

Daiced wrote:
Capncol wrote:That code will be pre.
Usually crank pos will give no start. Won't normally give hesitation but lambda will due to it's influence on fuel trim.
As i mentioned i have already taken care of the codes by switching the lambda senor all errors were cleared. Although to add to my problem sometimes i still have the problem i had pre switching the lambda sensor,
You actually said
I had some warning lights when i bought the car but that's all taken car of and since i've cleared the codes none have showed up again
Which didn't make it clear you had changed anything, and in your video that lambda doesn't look new.

As I thought, I just can't make out anything above the general din other than maybe a hiss at the end but that could have been the fan running. Anyone else make out anything?
Can you get live data on your code reader?
Cheers Col.


206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)

When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
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Slo
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Re: Uneven throttle

Post by Slo »

Something is whining on the cambelt train, either its rubbing on the cover or a bearing is on its way out, might be a good idea to slip the serpentine belt off and run the engine momentarily to see if it goes away then you can spin all the turny bits and feel if any are notchy.

If its still making that whining noise without the serpentine belt off then you need to get the timing belt cover off to investigate before it stops making any noises permanently :!:
Last edited by Slo on Sat Apr 09, 2016 11:58 pm, edited 1 time in total.
2003 03'reg Peugeot 206cc 1997cc Manual

Daiced
Posts: 44
Joined: Thu Mar 24, 2016 5:50 pm

Re: Uneven throttle

Post by Daiced »

Capncol wrote:
Daiced wrote:
Capncol wrote:That code will be pre.
Usually crank pos will give no start. Won't normally give hesitation but lambda will due to it's influence on fuel trim.
As i mentioned i have already taken care of the codes by switching the lambda senor all errors were cleared. Although to add to my problem sometimes i still have the problem i had pre switching the lambda sensor,
You actually said
I had some warning lights when i bought the car but that's all taken car of and since i've cleared the codes none have showed up again
Which didn't make it clear you had changed anything, and in your video that lambda doesn't look new.

As I thought, I just can't make out anything above the general din other than maybe a hiss at the end but that could have been the fan running. Anyone else make out anything?
Can you get live data on your code reader?
I can get live data, anything specific?

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Capncol
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Re: Uneven throttle

Post by Capncol »

Check lambda switching and throttle % as you open throttle. Should go up evenly to 100% (engine off for this)
Cheers Col.


206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)

When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
Better still, put the details in your signature.

Daiced
Posts: 44
Joined: Thu Mar 24, 2016 5:50 pm

Re: Uneven throttle

Post by Daiced »

Capncol wrote:Check lambda switching and throttle % as you open throttle. Should go up evenly to 100% (engine off for this)

I can't use my obd connector when the engine is off as far as i know.

Daiced
Posts: 44
Joined: Thu Mar 24, 2016 5:50 pm

Re: Uneven throttle

Post by Daiced »

So i figured out how to use my obd scanner and app to get the throttle info while the engine is off. And here is the result while the throttle is not pressed at all it's at 9% when i start pressing it, it takes a while but then suddenly it jumps up to 18% and then from there it goes more or less evenly up to 76,8% at the most. So i'm guessing there has to be something wrong with the throttle position sensor right? And if so where would i find it?