Tin worm attack ...
AO Gold Member
Join Date: Jan 2003
Location: United Kingdom
Re: New ECU needed, cheapest prices ?
There maybe a few things you can try before paying out for an expensive ECU.
1. Try a simple idle reset. Turn on ignition for 90 secs, turn off for 90 secs, start car and leave to idle. All this WITHOUT touching the throttle though! You might need to try this a couple of times.
It might also be possible to reset the idle actuator motor on the throttle to make sure this is working and in the right position (I'm not that familiar with the later models as mine is an early throttle-cable equipped TS). You'll need to hook the car up to a diagnostic system though. Check out my 'greenserpent' website for info on my TS problems ...
2. Check the throttle connections (you probably have a fly-by-wire throttle). The actuators connections can come loose. Make sure all the other connections are tight and clean.
3. Check the oil separator valve between the engine cam cover and inlet manifold. (again see my website for details on this and the position). If this is sticking it can alter the idle.
4. Finally, and as this is a fly-by-wire take care, the throttle body may need cleaning. Once of the crankcase breather pipes feeds into the intake pipes before the throttle (emissions, etc). this can oil up the throttle and make it stick. Use carb cleaner to remove all the residue that's built up. But don't force the butterfly to open unless you've removed any motors or actuators, as it is possible to damage these. I find it better to remove the throttle and clean it up rather than simply squirt cleaner into the throttle as the engine runs ...
And if you do still need an ECU, try Autolusso or AlfaCity for a 2nd-hand one (make sure it is the same part number though as there are several versions!)
HIS: 1998 156 2.0 TSpark with Sport Pack 2, sunroof and hi-level spoiler in Alfa Rosso. V6 intake mod, clear side repeaters and Zeatek undertray.
HERS: 2009 MiTo 1.4 95bhp Turismo arrived 21st November in Techno Grey with colour-coded headlight surrounds.
"If you're driving on the edge ... you're leaving too much room!"
My Alfa156 Web Site - how-to's, piccies, links, useful stuff, etc.