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backfiring on stock boost

dabigbolf

By dabigbolf,
in Engines & Forced Induction

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dabigbolf Proficient

dabigbolf

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hey,

i havestill got it set on stock boost, and its now backfiringand around 4500 rpm. Its not really loud but its enough to make the car feel like its surging. I have a bosch 040 fuel pump, i run it on mobile fuel. Premium stuff.

I also got the oil to air seperator installed. Now for this, the hose which normally runs from the cam cover into theinduction hose, has been blocked off. Now when starting the car up, it goes to about 700 rpm then drops down to where its about to stall then back up to about 500 rpm. And it sounds like it is idling really low. When oil to air seperators are used do people still keep the air circulating into the rubber induction hose? (its goes in just before the turbo)

And secondly i am going to install the plumb back Bov back on. For this to work it has to be as close to the throttle body as possible. In my case that is going to mean it will be on the otherside of the engine bay to where its going to have to be plumbed into.

Cause i have the front facing plenum. So do i have to run a really really long hose into the rubber induction pipe inbetween the air flow metre and turbo? or can i plumb it in somewhere else.

At the moment the rubber hose that used to go onto the crossover pipe, is being sent to the rubber induction pipe. This hose comes from the back of the plenum....

should this hose that i have sent to the induction pipe be going into the cooler piping, before the throttle body? and then run the plumb back bov to the induction hose instead?

its a little confusing, so many hoses can effect how the car revs, idles, etc.

This could be the cause of the backfiring aswell.

if someone could take the time to point me in the right direction it would be good. E.g someone with a front facing plenum, and a plumb back bov?

thanks

p.s

for an rb25

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dabigbolf Proficient

dabigbolf

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for anyone who has been bothered to read my long boring post....

i have done a search and have come across guys with the problems. Most people are talking about air flow metres, fuel cut, boost cut, needing an safc, or even a aftermarket ecu....

i am a bit confused about it all now.

one more thing, i also have the hose from actuator going up to the plenum. I dont have it plumbed into the cooler piping like from factory..

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