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Author Subject: Unlocked ecu
tony1991

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Registered: 07 Nov 2008

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Post #1
I have just got a black rallye of eBay. It's a none runner the guy changed the stem seals and ecu locked its self, so now fitted a unlocked ecu but still not running it almost wants to start, do the unlocked ecu need coding

Any ideas thanks
Posted 24th Oct 2012 at 21:32
Niall

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Location: Epsom

Registered: 06 Jun 2012

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Post #2
ECUs can not lock them selfs. If its been unlocked, it does not need coding to the BSI.

Im assuming you have started with the basics and checked all the sensors are plugged in?
Posted 24th Oct 2012 at 22:52
tony1991

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Post #3
Checked all sensors, the only thing I have found so far is fuel cut switch was no attached and is damaged on the connection so first thing is to get new one of those fitted, after that I will try compression and sparks

It almost wants to go but just not quite thinking timing may be a little bit out
Posted 25th Oct 2012 at 22:45
rikky 🦔

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Registered: 28 Feb 2004

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Post #4
can't you just bridge the inertia cutout switch to disable it?

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Posted 25th Oct 2012 at 22:47
Niall

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Post #5
rikky wrote:
can't you just bridge the inertia cutout switch to disable it?


yep just join the cables and its wired out.
Posted 25th Oct 2012 at 22:55
tony1991

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Post #6
Thanks I will try that tomorow
Posted 26th Oct 2012 at 10:26
tony1991

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Post #7
I have wired enertia cut off switch cables together, checked fuel pump with 12v which made fuel purge to engine, swapped relay with my red rallye which is working, checked fuse which is ok, But still won't start. I also swapped back to the ecu that was (apparently) locked and they both do the same thing, tbh I don't no what a locked one is supposed to do/no do?

If an ECU is locked then does it prevent power to fuel pump/spark plugs?

Any ideas thanks

P.s this is a friend of Tony who has asked me to proof read this post because apparently you guys rip him for his bad english.. Wink

Posted 27th Oct 2012 at 19:54
jackalk8

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Location: Northampton

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Post #8
inertia* Wink
Posted 27th Oct 2012 at 20:51
tony1991

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Post #9
Ecu works fine on my other rallye so can't that
Posted 28th Oct 2012 at 16:10
bas_306gti

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Post #10
The ECU is locked inside (in the software) it won't send any signals to injection/ignition until it is unlocked again.

You only can unlock the ECU if you have a ECU with the corresponding immobiliser module and keychip or if you have a unlocked ECU and cut the wires tp the pins 48 and 27 on the ECU before refitting




Posted 28th Oct 2012 at 18:29
tony1991

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Post #11
But I tried this ECU in my other rallye an fired up and ran fine
Posted 28th Oct 2012 at 20:24
bas_306gti

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Post #12
Then your problem is not a locked ECU.

can you hear the fuel pump upon startup?
Posted 28th Oct 2012 at 21:58
tony1991

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Post #13
No I can't, tried 12v to it an it works, relay I swapped with other rallye and works fine, fuse is all good

Bit stuck really with what to try next
Posted 28th Oct 2012 at 22:07
bas_306gti

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Post #14
Does the engine start when you put 12V on the pump?
Posted 29th Oct 2012 at 20:04
tony1991

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Post #15
No it doesn't, is there any sensors within the plug connecting the fuel pump. Next step I think is check plugs,compression, and if I can get the pump working on its own then I will have timing checked.

What ever I have got a pretty cheap black shell even if I har to change engine
Posted 29th Oct 2012 at 20:37
bas_306gti

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Post #16
does the engine crank over when you turn the key ?

is there a spark when you crank the engine ?

Posted 29th Oct 2012 at 21:10
tony1991

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Post #17
Yer engine cranks over just won't start it's not far from starting by the sounds of it.
Posted 29th Oct 2012 at 21:32
bas_306gti

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Post #18
When you crank the engine, have a somebody check if there's a spark from one of the plugs, if you don't have a spark check RPM sensor
Posted 29th Oct 2012 at 22:13
tvrfan007

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Post #19
Cam or crank sensor are likely culprits as eluded to above. 12V to the starter is required to crank, 12V to everything else is required to start!

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Posted 3rd Nov 2012 at 15:08
welshpug!

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Post #20
your other rallye, does that still have its transponder box connected? same goes for the one that wont start.

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Bring on the Trumpets.

Posted 3rd Nov 2012 at 15:16
stan_306gti6 Forum Admin

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Post #21
As said above, you need to check whether you have a spark. Yes

This will enable you to eliminate the immobiliser and crank sensor. Smile

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Posted 3rd Nov 2012 at 15:51
tony1991

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Post #22
I have changed the crank sensor for one I had on my old engine out of other rallye which worked , but still no spark the plugs look pretty dry and corroded
Posted 3rd Nov 2012 at 19:53
welshpug!

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Post #23
OI TONY!

welshpug! wrote:
your other rallye, does that still have its transponder box connected? same goes for the one that wont start.



so?

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 3rd Nov 2012 at 20:02
tony1991

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Post #24
Where will I find the transponder unit, my other rallye is 100% standard so should think its still fitted, just a fort could the timing be ever so slightly out

Any work that was done on the engine was very poor from I can see several bolts lose and a lot missing so thinking the guy may have set the timing wrong
Posted 3rd Nov 2012 at 20:10
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #25
EPIC PALM + FACE MOMENT.


without removing the transponder unit from under the dash (in front of the gearstick console) your "unlocked" ecu from the other Rallye will simply lock when you turn the ignition on, unless its a professionally unlocked ecu with cut pins.


________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 3rd Nov 2012 at 20:12

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