missfire ,hesitant,pop and bang

yappa · October 30, 2009, 12:14:34 PM

the car idles really nice but as soon as i put my foot down it hesitates has complete loss of power and when i let of it pops and bangs. but if i take it nice and easy i can go all the way though the rev range an im really starting the scratch my head as ive put new plugs and leads on, cleaned the earthing point on the ecu and plenum to body, changed the vacum piping from the plenum to the boost sensor on the bulkhead andive checked for stored fault codes and non have been found so i reset the memory anyway and its still the same:3Confused
so i could really do with some help and tips yappa

Cooch · October 30, 2009, 12:16:01 PM

Boost leak?

Also this sounds exactly like what is happening to me. Cant boost atall on the second turbo

yappa · October 30, 2009, 12:47:19 PM

im running no seq with no rats nest,hks mushroom filters and a decat and stainless exhaust where was you getting boost leak from? cheers

Speedworks · October 30, 2009, 12:58:39 PM

check map sensor connection

yappa · October 30, 2009, 01:08:11 PM

is the map sensor the 1 on the bulkhead that goes to the plenum

Bobbit · October 30, 2009, 02:17:01 PM

When were the plugs last changed bud?

Speedworks · October 30, 2009, 02:30:36 PM

map sensor should be where your ABS unit is (RHD cars) it has a connector on it and a vac hose (underside).
check if it\'s properly on and if it has no cracks

Cooch · October 30, 2009, 02:50:45 PM

Quote from: yappa;651368im running no seq with no rats nest,hks mushroom filters and a decat and stainless exhaust where was you getting boost leak from? cheers

Could easily be fuel cut as thats what i was hitting with a decat, cat back and air pump removed.

My boost leak originally was from the Y-pipe (the joiner hose) and i think it might coming from there again.

Bobbit · October 30, 2009, 03:18:30 PM

Quote from: Bobbit;651390When were the plugs last changed bud?

D\'Oh, just re-read you\'re 1st post, ignore me!

Have you changed the fuel filter? If it\'s blocked slightly you may not be getting enough fuel to the engine

yappa · October 30, 2009, 03:49:57 PM

no i havent changed the fuel filter yet ill get hold off 1 and try that cause its really buggin me now cz i crnt drive the car how i wnt to

yappa · October 30, 2009, 03:50:54 PM

how can i stop fuel cut?

Cooch · October 31, 2009, 08:36:01 AM

with an FCD or a new ECU i.e Apexi or chipped ECU

yappa · October 31, 2009, 09:39:25 AM

ryt well ill hope and pray that a fuel filter solves it as i dont have the cash to buy a new ecu as ve just been made redundant

m1tch · October 31, 2009, 09:47:22 AM

Quote from: yappa;651368im running no seq with no rats nest,hks mushroom filters and a decat and stainless exhaust where was you getting boost leak from? cheers

What ECU are you running?

yappa · October 31, 2009, 11:57:09 AM

a standard ecu think its a n3a7