200sx S14 returns exhaust with stage 1

[seb.racing]

hello
I have a friend who owns an S14 and since the installation of the chips stage 1
it returns the exhaust deceleration below 3000tr / min

it has no problem with the original ECU

thanks

[Jonny Wilkinson]

Not sure what you mean by "returns the exhaust"

Do you mean popping and banging and flames out of the exhaust pipe on the overrun ?

[seb.racing]

yes, the poc exhaust
small flames
in deceleration below 3000tr / min

[Jonny Wilkinson]

I think its a case of "They all do that, Sir".

Most people seem to like a bit of popping and banging on the overrun.

[seb.racing]

ok, it was to sure there is nothing wrong
the phenomenon must come from mapping that continues to fuel injected closed throttle

[Vigilant teSte]

Our SX runs a Nur Spec with all catalytic convertors removed from the downpipe and front section and even on a standard ECUmap you get a nice burbly popping on overrun. It is what I miss most about the old girl while she sits on the drive making the garden pretty.

[seb.racing]

ok thank for the information
I was wondering because with the standard ECU, I have very little flame to deceleration

[Slamz]

With a standard ECU mine popped and flamed with a decat/exhaust, with a stage 1a chip it does it even more. Are you running a blow off valve/recirc or not? Mine runs none which causes them to run rich on overrun, meaning more bangs and flames.

[seb.racing]

here is my configuration
- exhaust mongoose
- filter apexi
- walbro
- denso ik24
- blitz DD (atmospherique)
- stage 1 chips

thank

[Slamz]

The atmospheric dump valve will contribute to the bangs/flames. It's not necessarily a bad thing, but if you ran it recirculating, it should help if you really want to stop them.

[seb.racing]

Yes, my problem is not to shift gear
but to deceleration and closed throttle

[seb.racing]

for more understanding
my symptoms like a gun at the exhaust

[Slamz]

when I close the throttle on mine it normally bangs too