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93 Spi Mini Not Starting/running Right After Clutch Replacement


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#1 madcapkillerb

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Posted 26 June 2020 - 05:08 AM

Hello all,
this is my first post here so let me know if i did anything wrong.
basically me and my dad had to end up replacing the clutch in his mini and after we got everything back together with the new clutch it started fine. we left it to test drive the next day as it was pretty late and come the next day it wasn't running right. the car will sometimes run after messing with it for a while but if you give it any quick throttle inputs it will backfire and die. we have replaced sparkplugs and the ignition coil as well as checked the distributor for any obvious problems. currently as we have it it will not start but when you crank it it will sometimes backfire out of the intake. We have checked the vacuum lines to the ecu and whatnot and they all seem fine so not sure what the problem may be. also I'm not super familiar with minis so I am sorry if I got any of the terminology wrong. hopefully you guys will have some ideas for us to try next

Thank you for any help

#2 FlyingScot

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Posted 26 June 2020 - 07:48 AM

Welcome to TMF!

 

Check for anything you might have disturbed wiring wise.
 

You wrote changed the clutch - was it a matched assembly and the correct SPi clutch ?

 

The reason is that if you have replaced part of it or not taken care with getting the right one, you can have the alignment for the timing out.

 

Given the work you have done, I would be also better checking the crank sensor hasn't been damaged/disturbed in the process of changing the clutch. Also check that the plug connection is good to this sensor.

 

FS


Edited by FlyingScot, 26 June 2020 - 07:51 AM.


#3 pete l

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Posted 26 June 2020 - 07:51 AM

Could the flywheel be out by 180° ???



#4 viz139

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Posted 26 June 2020 - 11:28 AM

As above, if you have changed the pressure plate it must be an SPi item as the angle between the boss holes and flywheel holes can be different on other pressure plates upsetting the timing.



#5 xrocketengineer

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Posted 26 June 2020 - 07:42 PM

Hello all,
this is my first post here so let me know if i did anything wrong.
 

Yes, you bought a classic mini. :lol:   Regardless, like it was already mentioned the SPI, MPI and non injected engine flywheels are all different animals. Te same goes for the fuel injected and not injected pressure plate. Here is an explanation for the matching parts:

http://www.minispare...px|Back to shop

 

Assuming that all that is straightened out, then look for the obvious following Sprocket's excellent guide, starting with the vacuum pipes:

http://www.theminifo...oint-injection/

 

Good luck!



#6 madcapkillerb

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Posted 28 June 2020 - 01:30 AM

Welcome to TMF!

Check for anything you might have disturbed wiring wise.

You wrote changed the clutch - was it a matched assembly and the correct SPi clutch ?

The reason is that if you have replaced part of it or not taken care with getting the right one, you can have the alignment for the timing out.

Given the work you have done, I would be also better checking the crank sensor hasn't been damaged/disturbed in the process of changing the clutch. Also check that the plug connection is good to this sensor.

FS


Thanks for all the suggestions and links guys this is great help!

the clutch kit we put in was a GCK152MS which seems to be the correct one for the model; could it still be misaligned by 180 degrees?

We did take the crank sensor off to have a look at it and it did have a bit of metal shrapnel stuck to it that we took off. Also I forgot to mention in the original post but when we finished the clutch it started fine but the next day we tried starting it in nuetral with the clutch pedal not pushed in and the starter was not engaging. This was fixed after we pushed the clutch in to start it but I thought i would still mention it just incase. Also I don't know if this is any help but it is a 93 jdm model.

Thanks again for all the great ideas and help guys! hopefully we can get her running right soon!

#7 viz139

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Posted 28 June 2020 - 08:23 AM

The first thing that jumped into my head is that the flywheel is spinning on the crank :ohno: . When you started the first time did you move the car in gear?



#8 madcapkillerb

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Posted 28 June 2020 - 05:49 PM

The first thing that jumped into my head is that the flywheel is spinning on the crank :ohno: . When you started the first time did you move the car in gear?


uh oh that doesn't sound good aha yeah we moved it backwards and forwards a couple times before turning it off

#9 viz139

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Posted 28 June 2020 - 08:29 PM

Take off the starting motor and see if there is any movement in the fly wheel.






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