and find that it smokes out of the exhaust.Quite badly if left on tick over for a while. There is,on each bank,front end under cover.a Diaphragm. These Diaphragms do not last very long,and with the smoke coming from back of car,you think it will cost £££££'s.Infact in England it does for the parts,the job is a DIY. I have now found instead of the £30-£142 each that you can buy in China/Hong Kong for under a fiver each.These though cheap will last longer because the spring under diaphragm is not as strong,So by having weak spring it is a win win. Luck.