Hi guys ,, got a serious problem with my BA XR6T,, it drives good when accelerator pressed gently but starts backfiring( serious) when pressed hard ie on full throttle ... Please help me guys... Please ,....... It's All stock as a rock except typhoon intercooler... Please help me .....

could be plugs or coils. when were they last changed?

Change your Plugs!

Thanks guys I'll change plugs and c how I go....

Do the Plugs first!

Before you go to the expense of changing the Coils.

Thanks Rosie ....and boosted xr.... I don't know when they were last changed...... I'll change them tomorrow .... I ll let u guys know what's happening....

Hey guys I chNged the plugs but nothing changed car is still doing the same.... :(. It's kinda losing boost . It cruises good but when try to boost it... It slows down the car like engine braking thing and it doesn't go anywhere... HELP PLEASE.... please please.....

Maybe a blocked fuel filter, when was it last changed?

Did you check the gap when you changed the plugs?

Around .8 would be good for a fairly stock example.

Also, check that all your boost solenoid/wastegate

hoses are connected.

Otherwise it could be the good old valve springs....

EDIT: Just re-read your post, could be over boosting

due to the new 'cooler and hitting boost cut?

Edited July 26, 201115 yr by TurboMick

Thanks heeeeps guys I'll do that....