Bit of a update peeps, i took the pleneum off tonight and it stunk of petrol,i also found that it wasn'tsitting properly. all put back together but still have same problem ,i,ve also noticed that the chrome pipe in front of the drive belt gets red hot !! can any one explain why is this??? it has also blown the short rubber pipe it connects onto,could this be the problem??
If I am not mistaken those are the exhaust gases coming forward. There is obviously exhaust pressure (misfires, blockage, failure of the SAI one way valve on the SAI pipe, etc.). It may be related to your overall stuff but it is quite disturbing!
Should identify which side rubber coupling has been blown and others may help better or have ideas too.
Cheers.
Sorry I believe Marks DTM Calib already addressed it.