I have an XR4i and it has a misfire. I`ve started checking for a spark at each lead and that is fine. This has caused me to believe it is head related.

I have taken off the H.T leads off one at a time to try and find which valve it is. Whenever i take the a lead off on the passenger side, it mis fires a bit more which i think should happen, but if i take a lead of the drivers side, the misfire dosn`t get any worse...

Has anyone ever expirenced this on the cologne before?

Do i need a new engine?, Head? etc ?????

Someone please help me........!!

Cheers, Ed.

 

If it does not get any worse on any of the cylinders on one bank it has got to be something comman to all cylinders so unlikely to be valve/head fault. First thing to check would be inlet manifold gasket or an air leak on a vac hose on that side of the manifold.

 

I`ve just checked them two, to no avail.

I bought the car with a misfire, and he said that he had done a decoke on it including new headgasket. Not to sure what he means by that.

Any ideas? Really f**kin me off now!!!

 

I would be tempted to start with the basics ie timimg, ignition and cam and also do a dizzy swing to see if it improves first, check plug gaps etc and colour to see if rich, then try adjustiong after timimg swing the idle mix.
I have found from my short experience with these that they need a huge amount of ignition advance.
tabetha

 

have you checked the tappets to c if they are adjusted correctly

my friends one did this and he was told headgasket had went


i adjusted the tappets for him and its still going strong today

 

Cheers for the help guys. I `m gonna run through that list when i get back from work, and hopefully it might work. I`ll keep ya posted....

 

worked on loads of 2.8 capris myself.inlet manifold gasket always goes!

 

Hi,

Inlet manifold gasket defective, IMO.
It is only 2 problems on this engine : inlet manifold gasket and oil pomp shaft.

Regards.

Claude

 

Rs graham is right inlet manifold gasket would be favourite mate

 

Cheers guys, gonna change even if it does seem fine.

With any luck I might have a 24v v6 cossie lump in there before the end of the month!!...