AlexJReid

Hi,

My STI3 has just come over from Japan and seems to go rather well.

This evening I managed to get the boost gauge working. It was previously only reading 0 as the end of the pipe that goes into the sensor thing (sorry, that's as technical as I get...) had split.

Sorted this and it now works. However, under maximum acceleration the warning light on the gauge flashes on before the boost settles and holds at around 1.1bar. The memory function on the gauge shows 1.3-1.4 as being the peak which seems very high?

With more gradual acceleration it boosts steadily to 1.1.

Is this normal? Is the gauge just inaccurate?

No sign of fuel cut or anything like that. Just keeps pulling.

Car is running with V-Power and Miller's Octane Plus.

thanks for any advice
Alex

myblackwrx

iTrader: (1)

Check the ecu for a extra chip perhaps

gaz-cole

as said check for additional chips/boost increase mods as you dont want to blow it up now you`ve just got it.

AlexJReid

Absolutely - is there any easy way of checking, by looking at it, if the ECU has been chipped?

This assumes that the boost gauge is accurate and to be believed.

myblackwrx

iTrader: (1)

open up the ecu (under passenger carpet and kick plate).



this is a piccy of a z4 ecu (an ecu from a 95/96 wrx) in the bottom rhs you can see a bit of black plastic this is where the chips are normally soldered

dan83590

That piccy's gonna wear out before long..

myblackwrx

iTrader: (1)

It sure is although i've got a piccy of U8 ecu just in case it does .

92typeRA

ive used that pic to

myblackwrx

iTrader: (1)

Bollox, better put copyright on it you thieving buggers

DiddyWRX

Ah so that's what the inside of the Z4 looks like...cool!

myblackwrx

iTrader: (1)

Except for the black plastic thing (bottom rhs) as i understand you only get them when a chip is put in it

dan83590

I think the Z4, Z5, and 7B ecu's come with that chip socket as standard fit.

Andy Stevens

Its an STi3 chaps, different 3 plug ECU, the expansion socket is not as you know it. If it is on the standard ECU, be very careful. Upon inspection we have found a bug in the MAF curve on certain ECUs that will make it run lean at higher loads (ie when you whack the boost up).