Small Backfire during gear shifts?

[ER2PLZ]

Hey all

my R32 rb20det has been backfiring during gear shifts, not huge backfires just a small pop just as i take my foot off the throttle, i have recently had probs with bov's (when i bought my R32 it had 2 bov's, the stock one and a second HKS mounted near Airbox) i had busted the plastic nipple where the hose joins (this bov is pretty old, i think the whole setup is factory but have only seen one other R32 with same setup, possibly a factory extra?) i replaced the pipe that had the bov on with one that didnt leaving only the stock bov but still had same prob, i ended up repairing the HKS bov and put it back on the car but prob is still there and gettong more frequint.

any suggestions on how to fix prob or if the 2nd bov was a factory extra would be great

[NZM.031]

the hks one would have been fitted after....you should remove them both and get a new bov for the factory position, they arent expensive these days.

stock bovs arent much chop, and neither are the early hks ones, and running two bovs is a silly thing to do on an rb20, no need for it.

popping is due to richness, which if you have air leaking from one of the bovs it wont adj fuel to match the air loss. atmospheric bovs cause it to backfire, but if its only just started, id say you have a problem.

cheers

Linton

[ER2PLZ]

prob has been occuring since i bought it but im noticing it more now, but the repair job i did to the bov isnt that crash hot, however after i put it back on i did notice a slight increase in power

[WazR32GTSt]

Hey all

my R32 rb20det has been backfiring during gear shifts, not huge backfires just a small pop just as i take my foot off the throttle, i have recently had probs with bov's (when i bought my R32 it had 2 bov's, the stock one and a second HKS mounted near Airbox) i had busted the plastic nipple where the hose joins (this bov is pretty old, i think the whole setup is factory but have only seen one other R32 with same setup, possibly a factory extra?) i replaced the pipe that had the bov on with one that didnt leaving only the stock bov but still had same prob, i ended up repairing the HKS bov and put it back on the car but prob is still there and gettong more frequint.

any suggestions on how to fix prob or if the 2nd bov was a factory extra would be great

is your car auto by any chance?

the auto R32gtst's have this weird thing on the pipe that comes from the intercooler that joins up with the crossover pipe, at about the level of the airbox...

its like a little pipe that is blocked off with a rubber thing around it (bad description, i know...)

don't know why its there but it is on the auto's and the ex-owner may have used it to mount a bov

[silver gts-t]

is your car auto by any chance?

the auto R32gtst's have this weird thing on the pipe that comes from the intercooler that joins up with the crossover pipe, at about the level of the airbox...

its like a little pipe that is blocked off with a rubber thing around it (bad description, i know...)

don't know why its there but it is on the auto's and the ex-owner may have used it to mount a bov

ive seen it on heaps of manuals also,

its weird

[xRHETTx]

My car pops sometimes when i change gears or take my foot of the accelerater. I have stock BOV plumbed back, so it still happens with atmo venting bovs.

[ER2PLZ]

is your car auto by any chance?

the auto R32gtst's have this weird thing on the pipe that comes from the intercooler that joins up with the crossover pipe, at about the level of the airbox...

its like a little pipe that is blocked off with a rubber thing around it (bad description, i know...)

don't know why its there but it is on the auto's and the ex-owner may have used it to mount a bov

car is manual and the hks bov is mounted in same position as that weird pipe thing

[(B1) MR_fanny]

couldnt it be just back pressure? i get pops on and off accell.