Pops when ease off throttle

[Godzilla]

My Golf Digi has been doing this for over a month now but thought I would find out what it is!

She has a K&N panel filter, full s/s exhaust and is chipped. Since these mods were done I have had her tuned and thats when she starrted to make a kind of popping noise from exhaust when i ease off the throttle especially after hard throttle.....what is it, why and is it bad for my car?

[Agreeable Slick]

over fuelling, so that tune up, needs to be re-tuned. Not so bad for the engine as long as it doesn't blow back through the exhaust valve. Oh and it can render rear silencers useless pretty quick too.

[Godzilla]

Thanks Slick 

I will give the bloke a call and get him to re-tune it for me, hopefully for nothing as he tuned it wrong in the first place 

[russ-vdub]

thats more then likely down to the chip you have. Which chip have you got? Also as a quick fix, on the air flow meter, check that the screw isnt wound all the way to end, i mean turned fully clockwise. This will input max amount of fuel which could be contributing to the problem

[russ-vdub]

Forgot it to say, if the screw is, turn it back 1 and half turns and see if that helps.

[Godzilla]

thats more then likely down to the chip you have. Which chip have you got?

Its a Dubperformance one mate. Cost the grand total of £15.95 off Ebay    It claimed on the ad' to give another 6bhp (didnt believe that for one min!!) and get read of Digilag. Im sure it has not given even 1bhp and as for loosing the Digilag, nope, still comes to life past 4000rpm 

[russ-vdub]

take it out then, see what happens. i know from experience that those e-prom chips just adjust the values to make the car think its getting max amount of air in at all times. I studied the valvues from an ebay "performance chip" compared to a factory chip and the values where maxed out, for lack of better description.

[kittie]

and as for loosing the Digilag, nope, still comes to life past 4000rpm 

I've got a digi and have never experienced 'digilag', and the car certantly doesn't come to life only past 4000, surely there was something amiss with it to start with??

[kittie]

PS my car pops and bangs like a machine gun 

[russ-vdub]

Rubjohnys digifant tuning guide explains all.