hey guys ive done a few jobs to try and get her moving just dont know what to try next work so far

coil packs

breather hoses

bost pipes

maf sensor

but now getting code 16804 once a week and cel on

its still feeling like its holding back

any ideas ????? thanks in advance

:( i know what the code stands for but what is causing it

Was the MAF sensor a genuine Vag part?

16804 look here. http://wiki.ross-tech.com/wiki/index.php/16804/P0420/001056

could still be a boost leak, you need to check the whole system.

ok im going to get my mate to test it with his smoke tester over the crimbo break to look for leaks just want to get it going as it should

best thing to do is get someone with vagcom to do some logs and check block32? as that lets you know if it has boost or vac leaks.

would a snap on tester tell me this i gan have free use of one

Check for cracks in your exhaust manifold/downpipe/cat.

If they're cracked they'll be sucking in air when backing off the throttle.

Steve

thats sounding expensive oh well what will be will be want the little bugger flying maybe i need to drive another one so i can compare maybe im expecting to much

thats sounding expensive

Not really,

If it is a blow in the down-pipe/cat you could probably get it welded up for next to nothing. Hopefully that would solve the problem.

It might be worth checking the pre-cat o2 sensor too.

Steve

its booked in at rk engineering in cornwall for them to have a look

thats sounding expensive oh well what will be will be want the little bugger flying maybe i need to drive another one so i can compare maybe im expecting to much

Has it been remapped? If not to be honest they don't feel quick at all standard. A remapped one should fly though (unless you've got a slipping clutch like me)

Has it been remapped? If not to be honest they don't feel quick at all standard. A remapped one should fly though (unless you've got a slipping clutch like me)

it was mapped for about a week celtic tuning did it needless to say it was removed very quickly when funds allow i will be getting it done again but just want the motor to be tip top first

it was mapped for about a week celtic tuning did it needless to say it was removed very quickly when funds allow i will be getting it done again but just want the motor to be tip top first

It could be something left over from the map then? I've heard peoples cars running funny after having demo maps run out. If it was a duff map then it might still be playing havoc?

im thinking of having it mapped again now ive done all this work i have the last 2 fill ups run it on v power and no fault codes and its going better