Guys,

Help me please.

My car is a UK MY05 STI.
Remapped over a year ago by Andy Forrest.

I've noticed the following thing since - maybe just coincidence?

If the ECU is reset (I've had 2 flat batteries) my car runs like a complete dog for a while.
It won't even tick over - just stalls?
If I take it for a drive for a while its then OK again, ticks over normally

Why is this?

Thanks,
Shaun

 

What mods?

 

remapped Prodrive performance pack

 

Weird, not convinced it's the map then. After an ECU reset the idle can sometimes be a bit lumpier than usual as the fuel trims are being relearnt, not to the point where it will stall though.

So this only happens after a reset, not when it's stone cold?

 

No, only after a reset.

Not really a big problem (I hope!), and especially not now since I put a new battery in yesterday.
Both times after flat battery, dodgy idle after its warmed up and then stalling.

When dricing at the start you pull up to a junction and it'll stall etc.
I just drove it about for a while until it stopped stalling.
Drove it today, and its still idle's properly.

Weird eh?

 

Possible leak in the IC dude?

Steve

 

Really smart ecu, learns from scratch after a flat battery. The engine map is stored in a memory chip, but the learning process alters another section of semi-permanent memory that is wiped after a prolonged battery dis-connection. Having lost the "corrections", the ecu has to learn it all again.

HTH

dunx

P.S. I may be slightly out, but the basic description is sound.

 

I'd say you're probably right as thats what I think too.

I've emailed Mr. Forrest just for confirmation and peace of mind.

Shaun

 

Laid mine up for a few weeks last year, I cycle to work in the summer, and the CEL reset itself.

dunx