Missfire

20th June 2010, 18:25

A few months ago I got my saxo 1.4 8v vsx ready for it's MOT, gave it a service and checked everything over. On the morning of the MOT I went to fire it up and the cambelt snapped. I took the head off to check the damage (there was none), so popped on the new gasket and new head bolts, timed it all up and started it. But I had to hold it at 2k rpm to stop it cutting out. So I moved the belt a tooth this way, then a tooth that way but the missfire just got worse so I think the timing s right. Now it wont fire up at all. I replaced the plugs again today as they got really badly s#1t up whilst trying to start it, and I also got new leads and changed the coil pack. It just wont fire up. I thought maybe I put the leads back on wrong but not to sure, this is the sequence I used:

4 1
3 2

as though your at the front of the car looking in, and going cylinder 1 2 3 4

if this is right any ideas what might be up?

21st June 2010, 13:26

Hi

I beleive cylinder 1 is gearbox end on Tu engines. The leads should fall back into place onto the coilpack (they sort of stay in shape after being on the car for a while). Sorry I can not verify if
41
32

is correct I'm aftraid.

The missfire when the head was put back on could have been down to a slightly bent valve - are you sure there was no contact? How did you check etc etc.

Can you do a compression test to check each cylinder.

Check timing by locking crankshaft in position with drill bit or allen key into the flywheel and lock cam shaft with a 8/10mm drill bit. It goes through a hole in the cam pulley and ito a recess in the head. Check timning again and adjust if needed.

Hopefully some one can verify coil pack order to you mate.

Good luck getting it sorted

22nd July 2010, 17:00

Right, this is getting a little weird, it's all timed right, the firing sequence is also right and it is running with only a small misfire now, I've found that if I pop the 3rd ht lead off the plug, the coilpack starts to send sparks around all over the place (it doesn't happen if I remove any of other leads from other plugs). Has anyone else encountered this and if so could you tell me the corse? I've put it down to some sort of electrical fault as mechanically everything is sound, but if I can avoid sending it to an auto electrician that'd be great :-)

22nd July 2010, 20:44

I'd recommend a new engine, you could pick them up for £25, fit it yourself, will save you time and money

22nd July 2010, 20:49

mate-can you do me a favour?Let me know what was wrong when ya get it fixed.I'm curious as fuck.I would've thought it was a bent valve as well.happened to me with the 1.1,when i had it,bout a year ago

25th August 2010, 15:42

Turns out I'm a thick shit! I thought about it and the spark arking is just naturally what whould happen as it needs to earth to somewhere. So I stripped the engine down again as I wasn't completely happy and it turns out I have very slightly bent an exhaust valve after all! At least I know what's wrong now....even if it means I was wrong in the first place, doh.
Anyway I phoned up the local breakers and they asked me for my chasis number so they could get the engine code. I've been looking at engines on ebay and there are 2 1.4 8v's, 1 which is listed as a kfx and 1 as fxf. My problem is I'm not sure which I need as the chasis number is 0VF7SOKFXF...... I guess that the engine code is 3 of these letters, but which 3? it could be kfx or fxf. Can anyone help?

25th August 2010, 17:37

Ring up your local Citroen dealers mate with your chassis number they`ll have the correct codes listed.

Steve.

25th August 2010, 19:19

you will have one of the older 1.4 with a cast iron block, the other 1.4 is aluminium block

26th August 2010, 15:17

http://www.saxperience.com/forum/sho...d.php?t=233851

KFX it is lol, just found this ^ thread