scoobycarsean

hi there had a new exhaust fitted 22 12 06 put a 3inch all the way thought on it. with a decat so no cats on the car now but i now lost some of the turbo pressure in fact it is loseing more and more can anyone tell me wot prods would be causeing this thanks

cookstar

iTrader: (6)

What car/year

scoobycarsean

new age 2003 wrx sti import was ok before had exhaust fitted fitted by hayward and scott

p@ul

Yes m8 get it remapped,i was told this as when i booked in for the decat,i booked in for the remap 2 weeks after the decat and took it easy but on one occasion i had to get a nova boy off my @ss and floored it WHAM!! engine light straight on as the maf sensor cant read over the old levels and tbh it ran awful till the remap anyway but after boyo boy what a difference
And i aint on commission m8 lol
Sti 8 here

scoobycarsean

hi there had the exhaust fitted because had decat he fitted a small box which makes the engine light go out is this a remap if not can you tell me how much a remap would cost and who would do it i am in thurrock area do hayward and scott do it thanks

cookstar

iTrader: (6)

Sounds like a cell fix mate that he fitted, not a remap at all, remaps can range from £400 -£800 depending on type and mapper

scoobycarsean

hi there can you tell me wot a cell fix is

cookstar

iTrader: (6)

not too sure, when you deca the up/down pipe you loose a sensor as well, which throws the cell light up. the cell fix tricks the ECU ( I think its only a small resistor), into thinking the sensor is still there and working

scoobycarsean

yes he did fit something like that it puts the engine light out dont know how big it cost 40 to sluppy and fit so can not be that big do you think the cell fix is not working which is causeing the low turbo pressure because the turbo is only working half after the exhaust was fitted it was so fast know it is so slow

struv

likes been said you have allterd the flow and back pressure of the exhaust by de catting it so now your fueling will be out so now you have to get it remapped so it fuels correctly basicly you have only done half the job (and i wouldnt drive it too hard until you get it done either )

scoobycarsean

hi there so thats wot i need a remap it woulded be the box that was fitted so i would be looking at about 400 pounds is that right do you know were i can get it done many thanks

Midlife......

iTrader: (2)

De-catting the STi often leads to boost spikes and the ECU reduces boost / retards ignition to protect the engine = loss of performance. Not really MAF related.

There is a home made fix involving drilling out the restrictor in the boost pipework but not ideal. Best to get it re-mapped, loads of places can sort that out for you...... usually using EcuTeK mapping sortware.

Expect to pay £650 plus VAT for re-map but check out the group buy section as this may work out a bit cheaper

The other thing is that the EcuTeK software "maps out" the de-cat CEL which is P0420 so the Cel fix is not required and best removed.

Check the air filter, I think the Newage Jap imports have a high flow filter to handle the increased air flow

HTH

Midlife.....

Midlife......

iTrader: (2)

I also just wondered what fuel you are using as the ECU will be expecting 100RON..... the de-cat might have pushed you into more DET and the ECU is cutting boost, retarding ignition and adding more fuel

Midlife.....

cookstar

iTrader: (6)

Mocom racing are doing their own remaps a group buy at the mo for £400, and there have been some VERY good reports about them so far

scoobycarsean

many thanks for that should had left it well alone but i have started so i will finish thanks for all your infor