Snowy_RA

I have a late 94 RA (Its 95 Spec), anyway yesterday
while going for a run Id been giving it some stick. While poodling
I brought the boost into about 0.6 bar and there was a pop and
and bang/misfire and the car decelerated momintarily before
I got my foot off the gas fast - No CEL.

I then tried accelerating in it but it refused to go over 0.5 bar of
boost and I remember reading about 'Limp home mode' and can
only assume my car had entered this mode. I stopped, did some
shopping, returned to the car and it was back to just over 1.1 Bar.

Its got a full decat, Induction Kit and running a scoobyECU chip.
Now about 30mins earlier I performed an ECU reset and switched
MAP's over to the ScoobyECU one (I had been using the default
one due to a faulty 2 way switch I bought and didnt realise)- dont
know if this is related.

So after all that my question is.. what causes limp home mode
Could I have overboosted and caused it etc?

To be honest I tought it could be overboost as it boost's too high
on the standard map.. 1 Bar - Im thinking of getting a dawes to
fix it at just under 1.1 bar.. however at 0.6 bar Hmmm?

911

Possibly the car sensed overboost, fuel cut followed and the ecu dropped to Limp Home.

When I suffered regular fuel cut never had the Limp home mode though (Sti v3).
I think this can happen if det sets in. Are you using Optimax at minimum?

Maybe someone closer to your prob will post.

911

Snowy_RA

Always used optimax though I have stopped adding booster - I guess it must have been det as nobody else seems to have any ideas..

I better either get a Dawes or change chip back then.

Cheers