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1994 Cooper Spi Wont Turn Over


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#1 BMC

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Posted 29 May 2015 - 06:30 PM

Well ages and ages ago i found the immobilizer and pulled it out as it was mostly not attached anymore, now i have come to start it there are no clicks or anything when i turn the key, the immobilizer i was told hasnt been in use for about 15 years as it caused starting problems hence why when  found it i took it out, Will that be the reason why the mini doesnt even attempt to turn over or could there be another issue since its been stood about a year since it was last run? It had stood 9 years and ran fine with a new fuel pump fuel and battery, fired almost straight away.
Thanks



#2 Fast Ivan

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Posted 29 May 2015 - 08:05 PM

It's certainly a prime suspect that's for sure
Can you hear the fuel pump prime?

#3 BMC

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Posted 29 May 2015 - 09:16 PM

Yeah its on a seperate switch so is manually turned on and off, Big Bosch 255lph thing mounted to the bottom of the seat under the car haha

Yeah, Another thing is over its lifetime it appears to have had a new front end before we got it about 15 years ago, its only 20 years old, the fuel pump was wired in to a seperate switch and i dont know why, most of the electrical bits dont work properly now its runnong a non standard fuel pump under the back end with the tanks pipes modified to reach the bottom of the tank now the pump that should be there is gone as it killed one after a month of sitting with fresh petrol in it. its in need of another new front end, possibly a rear subframe but think i may have a good one in the other garage + a backplate for the brake that works properly. the wheel nuts are knackered and its got a door off a Mini City. The immobilizer is missing as is the inertia switch though i have one to add to the freshly redone fuel pump wiring so its partially safe haha.
Montie is in a mess
 

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Edited by BMC, 29 May 2015 - 09:41 PM.


#4 spiguy

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Posted 29 May 2015 - 10:56 PM

I'm unclear on this - did the car ever run with the immobiliser removed completely? I'm not sure if it can run without it, the immobiliser is coded to the ECU and when disarmed, I know that the ECU will enable the starter solenoid, however I don't know if it goes deeper than that - ie maybe with no immobiliser and hence no way of telling the ECU it is disarmed, then the ECU will not 'run' the car (fuelling,ignition etc). However it is possible that it is simply a passive immobiliser which does not allow the starter solenoid to close in the relay pack. In that case, then in theory you could wire the ignition barrel directly to the starter relay in the relay pack. However if it does go beyond disabling the starter relay then you will have problems.

 

I suggest if you want to try it, then you could  try just manually powering the starter to see if it starts - you have already have manual control over the fuel pump, after that there is the possibility that the main relay and / or the ignition coil relay will also not close (also under ECU control) but again that will be proven either way by manually powering the starter with the ignition switched on.

 

A good guy on here that may be along shortly anyway (or you could PM him) is 'Flyingscot'. He knows alot about the ECU / immobiliser side of things on the injection cars.


Edited by carlukemini, 29 May 2015 - 10:57 PM.


#5 FlyingScot

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Posted 30 May 2015 - 12:47 AM

SPi have two different sorts of immobiliser and Functions. The early ones have the Lucas 3AS and the later ones the more common Lucas (then TRW) 5AS. It sounds like you had the earlier one and the wiring was butchered to make it work although if you took it out without knowing how it works it could be the problem....
I am not going to post any more info about these for obvious reasons, but I suggest you get familiar with the wiring diagram and a multimeter as any number of broken/missing wiring could create the problem you have.

Did you keep the immobiliser? Is your ECU the two plug variety ?

FS

Edited by FlyingScot, 30 May 2015 - 12:51 AM.


#6 BMC

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Posted 30 May 2015 - 01:18 AM

i'll have a look at the ECU tomorrow i think its only got 1 plug on it though and as the title says its a 94 if thats any help and no i dont have the immobilizer anymore though it was just a black plastic box with what looked like resin to seal the end if thats any help? dont have a multimeter though i do have a little light up volt meter thing from aldi. If i have manual control over the fuel pump and i can wire the ignition to the starter relay and pass that other than the stepper motor on the throttle and some stupid sensors in the exhaust is there anything else it does or could i just stick an exhaust on it without the sensors ditch the ECU and stick a choke cable where the stepper motor was and remove all the other shitty bits like the charcoal canister? Mix old with new



#7 FlyingScot

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Posted 30 May 2015 - 06:45 AM

What you are suggesting won't work, sorry. It isn't possible to mix and match like you suggest.
Your car was built as a fuel injection model, and each part is designed to work with the others, for example the ignition is also controlled by the MEMS ECU.
Even if you binned the lot and switched to a carburettor (which is more than just fitting a carb) you would be unlikely to pass the emissions part of the MOT (which was the reason for the switch to fuel injection in the first place).

It's up to you but I would be trying to repair what is missing or finding someone in your local club or auto electrician who can if your not confident.

FS

#8 BMC

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Posted 30 May 2015 - 08:07 PM

Got it running today with £10 worth of fuel and a screwdriver, Engine management relay is dead, found it today.

 

 

Took it off the axle stands and got it moving down the road with its 3 brakes. Running great with the new silicone vaccum hoses and sits just above cold, didnt restart under its own power after running for an hour though.


Edited by BMC, 30 May 2015 - 08:09 PM.


#9 BMC

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Posted 01 June 2015 - 02:54 PM

Montie after 2 years of begging my stepdad has finally been forced into phoning his friend by my stepmum into arranging for his new pannels to be fitted
Anybody got a cheapish full working non buctured loom for an SPI with a single plug ECU?






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