My wife just called to tell me something odd is happening with the car,
basically when she is accelerating then lets off there is a bit of a jolt
not violent but noticeable jolt.

The only work done on the car recently was the fuel filter, but there was no
problem after that was done (by me) but it was serviced on Friday an only
really driven today and she has now noticed. Sadly the mobile mechanic who
did it is on holiday for a month so I'm wondering what might cause this ?

It was just the air filter, pollen filter, and oil-oil filter done. I asked
him about the throttle cable as it felt a little slow in responding at the
gas pedal he tightened it up as tight as it can go and put the clip in place
holding it like that. Could it be too tight ?

Nothing else was touched.

mk4 golf 1.6 8v 1999 AEH engine 80k petrol

On 12/07/2011 10:58, Pete wrote:
I asked
him about the throttle cable as it felt a little slow in responding at the
gas pedal he tightened it up as tight as it can go and put the clip in
place
holding it like that. Could it be too tight ?


Perhaps. I'm not familiar with the AEH, but many VW engines of that time
had a throttle with both a cable /and/ an electronic throttle valve- the
ECU trims the throttle adjustment using a stepper motor. You shouldn't
adjust the throttle cable, or otherwise bugger about with the throttle
valve without performing an electronic alignment: this runs the stepper
motor through the full range. Obviously your mobile guy doesn't know
this :-/.

http://www.ross-tech.com/vag-com/cars/throttlebody.html

This arrangment can give a slightly odd throttle response especially as
you're trying to pull away, I find, which may be why you found it slow
to respond. Our Lupo with an AFK engine has this arrangement.

If the electronic adaption is out, it can make the car run quite
erratically.