My ford focus 1.6 zetec se is missfireing on the 4th cylinder and the engine management light is on i have already done the spark plugs and leads but it is sparking any ideas thanks

AND AFRICAN CAR (CLUE 1, SWINGING WORD FOR CRANKING)
the books and parts and wiring on cars are not the same world wide
so we are forced to guess the #1 top, fact, country???? why?
A FULL ENGINE SwAP INSTALL.(REBUILD)
1.6L (z6 is hard to find googled ,Impossible to learn)
THERE IS ALSO A 1.6l TDI, DIESEL BUT HAS A FORD ENGINE NAME FOR THAT.
so what fuel is this, my guess PETROL


well 2nd is spark
first is:
if engine is good and compression test pass, it may be good engine.
CAM TIMED CORRECT, COMPRESSION 150PSI UP, NOT 50.

then comes spark all 4 cylinders must have spark (tested)
so coil packs, not connected
or CKP OR CMP SENSORS UNPLUGGED OR WRECKED AT INSTALL. ALL ENGINE HARNESS CABLES MUST BE FULLY CONNECTED,.for sure parks, injectors and all sensor.s.


LAST IS FUEL (PRESSURE AT SPEC. CRANKED
OR T HIS?????

2007 Ford Focus 1.6 16V Zetec (man. 5) (model for Europe )??????? guessing this, , engine choices 2007 , call Gen2, Focus MK2 Europe.

• 1.6 L Zetec-SE I4 (petrol)
• 1.6 L Zetec-SE Ti-VCT I4 (petrol)
• 1.6 L DuraTorq TDCi I4 (diesel)
• 1.6 L DuraTorq DLD-416 DPF I4 (diesel)

see how 1.6l means so little and real names work so much better?
For the South African market, the 1.6L BZ inline-four engine was used in their Mk2
to get help on any engine problem learn what it there first
the real name and then tell it.
the sure are not the same.

check the timming, check spark plugs, check compression of the cylinders, check spark plug wires and if all else fails replace the ignition coil module

2005 ford focus 1.6 zetec missfire and engine management light flashing on and off . also my car feels like it heavy on petrol milage any helps please

Hi.

You should do a diagnostic with a scan tool first.

Probably an ignition coil problem. Replace it and replace also the spark plugs.

there are no timing marks as such on the focus mate you have to lock the cams with a setting bar (to do this you need to remove the rocker cover and lock the cams with a locking bar)
the crank is locked up by removing a plug behind the oil pump on the back of the engine (the crank needs to be at top dead center on number 1 cylinder and this can be done by removing number 1 spark plug and using a long piece of welding wire or screwdriver, place in to the cylinder and turn over until the piston is at the top)
with the cams locked and the crank locked your engine will be timed up
please let me know if this has been of any help
cheers
big mike :)

get a plug spanner (more a socket than a spanner) and after removing the plug lead, use the spanner to remove the plug. Do one at a time so you dont get the leads mixed up or it will not start.

Try a compression test. You could have a bent valve or a bad ring on the piston. If the compression test shows it to be much lower than the other cylinders then its a mechanical problem. The valve may not be seating or a weak spring isn't allowing the valves to close and its leaking under load.

Hi
Try to switch Ignition wires......if problem persists on other Cyl - Its a bad wire...if nisfiring gone ?
You are ready to roll !

JustMy2Cents

• drain oil using allen key plug underneath gearbox till all oil is drained refit use new seal if old 1 is damaged then look at front of g/box quater of the way up is another allen key plug remove fill with new oil till it starts to run out hole refit plug and ur done

hi, yes it will be safe to drive but you might have less power.

If its petrol engine then the fault could be a spark plug ot spark plug lead these will need to be replaced its best to replace all four at the same time to ensure you have no problems with the others.
The other problem it could be is the engine management now this is very expensive to buy but easy to replace.

hope this is some help to you let me know if you have any questions or if your car is a diesel if it is then it could be an expensive repair.
Let me know how you get on ok.

If you are unsure then leave it to a garage as they have a machine that clip onto the leads and tell them where the fault is and what the cause of the problem is.
This isnt expensive to get done and it will tell you the problem strait away hope fully its something simple like plug and leads.