Backfire/Popping after clutch release - turbo

skylinegtr_r34, Jun 23, 7:24am
Hi, I am getting a pop or backfire after releasing the clutch when going up gears (1-2, 2-3 etc). This is in an sr20det s14 silvia running 11psi (standard I think). Any idea what this could be!

bigracket, Jun 23, 7:26am
unburnt fuel!

andrea_w, Jun 23, 7:43am
Does it do it every time or just sometimes!
Do you have a BOV fitted that vents to atmosphere!

intrade, Jun 23, 7:44am
is there a crank sensore on flywheel!

bigfatmat1, Jun 23, 9:17am
possible air leak! bov not vented correctly!

zoltec45, Jun 23, 9:53am
IT IS RUNNING LEAN. Sounds wierd but it is.
Same thing happened to me, popping when changing gear, black soot on the bumper! I upgraded the fuel pump then this started happening, you need to upgrade the fuel pressure regulator and tune- serious damage will occur if its not sorted

zoltec45, Jun 23, 9:55am
Also standard boost is 7psi so something is going on there, if its boosting extra but hasnt had a fuel upgrade, expect damage.

skylinegtr_r34, Jul 19, 1:08pm
I do have a BOV fitted, unsure if this vents into the atmosphere. This is my first turbo car - so not sure too much about them.