Car jerks when accelerator is released

[simex]

Has anyone ever had the problem where their car jerks slightly when taking your foot off the accelerator pedal?

It seems as though when I take my foot off the pedal, the car revs a little by its self. This happens in all gears and at throughout the entire rev range.

I have a 2001 VW golf GL 1.6

Thanks

[william]

it could be a number on things my opinion is that it may be a clutch or airflow meter how many ks has the vehicle done

[simex]

it's on 100,000 km's

i don't think it's the clutch, for the reason that it happen in neutral. (reving slightly as i take my foot off the pedal)

It could possibly be the air flow meter.

[william]

the best way to check the airflow meter is to just disconnect the connector plug and see if the idle changes ,this just happens on idle if so i could be a misfire caused but cheapo fuel so use premium bc it fowls up o2 sensors what is your location i can put the car on the computer and i can give u an instant fault its hard to determine as the 1.6 simos engines have many faults that can cause other faults

[william]

melbourne hmm to far also check coolant temp sensor to check if green plug if so fault may not be in temp sender unit but start there as is cheapest part all of 50 dollars where the air flow meter is 350 including labour

[simex]

thanks for the advice William, I will have a look at those things you mentioned.

It could also be something to do with the accelerator cable. Just as i release the pedal, whether i'm in gear or not, i feel i slight "kick" in the pedal.

Could be the cable getting stuck...?

[william]

uncommon but may be the case the best way to check that is by pressing the accelerator they pulling it back up if the revs change you know the cable need adjusting i cant recal if u can adjust on throttle body

[Bug_racer]

It can be adjusted outside , it works the same way as mk3's .

I think its none of these problems .
My thought is the throttle body itself .
If the throttle position sensor (tps) is playing up then the engine ecu will not use this cause its outside its tolerances and use the MAF and Lambda probe to adjust the throttle instead . Since the MAF and lambda dont react as quick as the tps you will get bucking and jerking . A quick test is to see if the cruise control still works .

[simex]

sadly i have a GL and don't have cruise control.

what would a throttle body set me back $$ ??

[h100vw]

http://www.ecstuning.com/stage/edpd/pagebuild_v2.cgi?make=Volkswagen&engine=1.8T&model=Golf%20IV&submodel=&category=Engine&subcategory=Cooling

A bit cheaper from the states.

Gavin

[mikinoz]

I have recified this fault myself on my 1.6.

You go to the point on the acc. cable where it emerges at the throttle body end, you take the clip off that retains it, pull it so that it is not opening the throttle, but tight and then return the clip back.

It somehow loosens, and this fix sorted me out for 20000km now.

You will also get better throttle response now. Maybe give the throttle body a clean too... why not !

[gtimk5]

The main thing is to make sure you are not getting full throttle before the pedal hits the floor as no doubt the cables aren't cheap! If you don't check this then you are straining the cable every time that you apply full acceleration. That is a bad thing!

[simex]

Thanks Mikinoz, that will save me some money if it works.

GTIMK5: In order to prevent the cable from undergoing any strain, should i just increase the height of the stopper under the pedal?

[gtimk5]

Yes, you sure can. That is an option. However, you shouldn't need to adjust that if the cable is set correctly. Cheers, Andrew

[polak]

same problem

Ive once had this exact same problem on my 2000 1.6 GL. However funnily enough before i knew it the problem had actually fixed itself. It just topped doing it.
Good Luck with it