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Changed ecu, bsi, fob now immobiliser fault
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Mrgsxr1127

Posted: Wed Mar 19, 2014 6:53 pm

Joined: Mar 19, 2014
Posts: 5
Trade Rating: 0

Firstly hello and thanks for this useful forum, my wife passed her test and got a cheap 206 1.6 xsi off eBay that has had me looking at this site a lot for solutions to its problems.

The car ran but didn't tickover well it ticked over very low and often stalled, the engine ran very rich too. The coolant temp read too low (55-60 at fully warmed up) and the oil temp bearly moves off the bottom.

The tachometer reads about 500 revs too low too. (I get the real rpm and temperatures of 85 over obdii)

The engine would idle well when stone cold and run pants when warm. (Consistent with over rich mixture)

I changed thermostat, coolant temp sender, plugs (Bosch), the crappy sagem coil pack for velio, but it was only a little better.

Then she drove to London and due to all the constant stalling And restarting in traffic, flattened her battery. She took it off charged it and fitted it back on but the car wouldn't turn over. Green flag couldn't fix it so I drove down and towed her home.

You could hear a relay oscillating in the fuse box in bonnet when ignition on, I assumed she spiked her bsi by not following battery removal procedure.

And I figured the crap running problems were due to ecu being spiked by coil pack.... So to kill 2 birds I bought an ecu/bsi/fuse box/key fob/transponder ring off eBay.all off same car (which is same model)

I tried just fuse box, no change so swapped everything, now the engine turns over but doesn't fire, the screen displays immobiliser fault... (The fuel pump does prime when the ignition is turned on) and the white/red enable wire to the ecu does get grounded however there is no voltage present on the green fuse in bonnet (think its no13 but can't remember, it's the main one for ignition coils...) I did jump it to 12v to manually power the circuits but still didn't work as I suspect the ecu is immobilised and not sending pulses to coils anyway.

I don't understand why it's not working, the fob,ecu and bsi all match, I'm thinking of sending the ecu off to be unlocked but are there any cheaper alternatives before I throw yet more money at this thing ? I tried bsi reset. The ignition beeps when key in so transponder seems to work.

Thanks and sorry for long post.

Mrgsxr1127

Posted: Thu Mar 20, 2014 7:58 pm

Joined: Mar 19, 2014
Posts: 5
Trade Rating: 0

Oops.... I took the pcb out of the new key and fitted it into the old key case (as it was in better condition) not realising that the actual transponder chip is in the case not the pcb, I swapped transponder chips and it started up streight away.... Un fortunately it runs just as bad as before.... Ticks over low and if you rev it and come off the throttle it stalls as the revs drop.

Time for a new throttle body ?

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