General ECU and whats this box then?

[gazzaman2k]

hi i recently brought a mk1 E reg uno turbo 1299cc version (early one i guess) and was striping the looms out well i know the ECU is in the engine bay near the engine, but inside on the drivers side below the steering column i find this box:

its made by botch and looks like a ECU but inside theres no chips only resisotors and crap.

what does this control? fuel?

cheers in advance

also i have few various mk1 uno turbo things for sale.......

speedo clocks in good cond
light switch box
wiper control switchbox
set of 4 abarth 13" alloys with 4 good tyres (alloys need a good clean)
clear indicators
headlights

 

[alexGS]

Yep, unlike with newer cars, there are separate ECUs for fuel and ignition! You already found the Magneti-Marelli one in the engine bay for the ignition (Microplex), so the one you have pictured is the Bosch LE2-Jetronic fuel injection. Interestingly these two ECUs don't share any sensors (one of the reasons why newer designs are integrated) - most of the engine sensors are concerned with the ignition ECU. Haynes manual has a good description of how the fuel injection works and which sensors it uses.

I personally think it's a pretty good ECU, simple and reliable, though it doesn't have a replaceable 'chip' for the mapping. Are you sure there are no chips on either side of the circuit board? I haven't opened one up yet. It's understandable that there'd be lots of resistors and crap (*ahem* 'discrete componentry') because it's driving electro-mechanical devices (the injectors).

But contrary to what someone said recently, it does control the injectors digitally by varying the duration of the pulses. The main analogue input is the airflow meter, which is a rather old-school moving-vane type. The other analogue input is the coolant temp sensor. Throttle position is just a switch. I think, though, that this Bosch gear is a lot more reliable than anyone gives it credit for. I'd rather have it than a Weber carburettor...

-Alex

 

[SteveNZ]

Some old bosch ecu's are known as "analogue" ecus. I'm not sure what this means but I think its how they process all the information.

 

[Jai]

look out for shysters:
http://cgi.ebay.co.uk/FIAT-UNO-TURB...066162527QQcategoryZ32094QQrdZ1QQcmdZViewItem

 

[gazzaman2k]

look out for shysters:
http://cgi.ebay.co.uk/FIAT-UNO-TURB...066162527QQcategoryZ32094QQrdZ1QQcmdZViewItem

are they good chips then? or does anywhere still chip these?

 

[alexGS]

It's amazing that someone could run an auction like that. You can't re-chip the ECU, and even if you could, it wouldn't alter the boost in the way that seller implies.

-Alex

 

[SteveNZ]

Problem is he may be a genuine seller and thinks it is chipped because someone told him so. I looked over a Punto a while back for a friend. The seller said he "thinks its been chipped". Yeah right, whatever. But some plod may believe it and eventually he's going to sell it on.