Hi all
I’m trying to get to the bottom of smoke issue that has developed as a result of installing aftermarket boost pipes, (SFS). The issue began after installing a full silicone set, and has now become worse after installing a set with alloy sections.
The car:
Cupra TDI, non mapped with a full straight through 2.5" exhaust. No fault codes, no vac or boost leak. EGR is standard, no noticeable drop in mpg...
The issue:
The car appears to be over fueling when driving in slow moving traffic below 1500 rpm such that i can see smoke when stationary and a lot of smoke when pulling away just on boost. If i sit stationary holding the revs at around the turbo spool up point i can create my own private smoke screen to hide in. This is embarrassing
Am i right in thinking that at these low revs I’m not getting enough air through to combust the amount of fuel that’s being injected?
Could the MAF be thinking that the volume of air coming in is fine, when in fact post MAF larger diameter boost pipes result in a lower than expected amount of air as boost pipe volume increases? Would a larger MAF unit compensate for this?
Any help much appreciated!
Cheers
I’m trying to get to the bottom of smoke issue that has developed as a result of installing aftermarket boost pipes, (SFS). The issue began after installing a full silicone set, and has now become worse after installing a set with alloy sections.
The car:
Cupra TDI, non mapped with a full straight through 2.5" exhaust. No fault codes, no vac or boost leak. EGR is standard, no noticeable drop in mpg...
The issue:
The car appears to be over fueling when driving in slow moving traffic below 1500 rpm such that i can see smoke when stationary and a lot of smoke when pulling away just on boost. If i sit stationary holding the revs at around the turbo spool up point i can create my own private smoke screen to hide in. This is embarrassing
Am i right in thinking that at these low revs I’m not getting enough air through to combust the amount of fuel that’s being injected?
Could the MAF be thinking that the volume of air coming in is fine, when in fact post MAF larger diameter boost pipes result in a lower than expected amount of air as boost pipe volume increases? Would a larger MAF unit compensate for this?
Any help much appreciated!
Cheers