Cylinder 4 hatchback 08 focus petrol

[tophammer]

Tryed plugs leads coil pack 

Compression test 

Says cylinder 4

Is little bit weak 

Car drive s 100%

But when I go to stop

Or slow down

Car sometimes

Cuts out 

1 tip I got was to put 

Spoon full of oil 

Down into cylinder 4

Wonder would

Tht help 

As this problem

Is only issue

With the car

Theirs no engine light on

Can anyone please

Advice me on the above

Problem

 

 

 

 

 

 

[Luke4efc]

You don't need 

To post your topics

Like this

It makes it

Very hard

To read.

Anyway, why have you done a compression test if you say the car drives 100% and there's no EML on?

What's the actual compression reading?

The spoon of oil trick is a last ditch attempt at determining whether it's a bad piston ring causing low compression. If you pour some oil in, repeat the compression test and it reads the same as the other pistons, you know it's nothing to do with the valves.

[tophammer]

Tk for reply it says on compression

Test tht cylinder 4 is weak .so I'll try put spoon full of oil in the weak sylnder 4 then drive it you think it's best to do compression.test again so . many thanks regards your reply