10 replies to this topic

[Bell-nose]

Hi everyone,

Okay a bit if background

My car is a 1998 Cooper Mpi.

Rebuilt my car from a bare shell and replaced the box clutch and cylinder head fitting all new gaskets and torquing up properly.

New sparks, new leads, air filter oil filter and valve clearances set ( I think)

Set up leads in line with how it was when It came off the car.

Only appear to have two cylinders and I don't know why. I've pulled a lead out at a time and they all are issuing sparks.

Please can anyone suggest done reasons as I'm out of ideas.

Edited by Bell-nose, 18 May 2014 - 05:35 PM.

[sonikk4]

Have you adjusted your tappets correctly??

[Bell-nose]

Hi Sonikk4

Thanks I did set up the valve clearances if that is what you mean?

[jamesmpi]

Have you got the ht leads on in the correct order?

[sonikk4]

Hi Sonikk4

Thanks I did set up the valve clearances if that is what you mean?

 

yes that is what i meant, have you done a compression test to rule that out??

[Bell-nose]

Hi Sonikk4

Thanks I did set up the valve clearances if that is what you mean?

 

yes, although they don't correspond to the webbing numbers. i set them up the same as they were (which was right when i took them off the car)

[Bell-nose]

 

Hi Sonikk4

Thanks I did set up the valve clearances if that is what you mean?

 

yes that is what i meant, have you done a compression test to rule that out??

 

No i haven't can you explain why this would mean the car would run on 2 cylinders? My assumption os that if its not exact this would result in a lumpy idle only?

 

By the way its worth noting that the head is a brand new old stock fully built head.

 

Thanks,

 

D

 

Thanks,

[sonikk4]

By doing a compression test you will see if you have sufficient and equal compression across all four pistons. (within 10% of each other is a good sign) Ideally you will be looking for 150 psi + per pot.

 

If you have no compression on 2 and 3 for example it will not matter if you have a spark and fuel. Without the compression there will be no firing.

 

Its a basic check and if you don't have a compression tester you can buy them from Halfords etc. Its something to rule out out of your fault diagnosis.

[Yoda]

I would be double checking that the HT leads are in the right order before trying anything else!

[drs]

first check the HT's as above, the Rover workshop manual is wrong and the Haynes is correct.  From memory I think 2 and 3 are wrong in the rover manual, if you used rover workshop manual beware!

I just put my mpi back it only ran on two cyls, turned out to be one cleaned injector was not working, just a thought!

pauls

[Bell-nose]

Checked the vale clearances and 8 and 2 were miles out  we're taking cm's not mm's! 

 

God only knows how that happened all the others were fine.

 

Any way thanks to all for your support ale always, without you i would not have finish my project

 

next stop the MOT bay.........