Would a cracked manifold cause these problems?

[Lukus-vtr]

Hi need help asap.

I have a missfire that won't go away, the car is guzzling fuel and it's come up with three fault codes.

p0300
p0105
p0130

This is what I have changed in the last couple of weeks.

Spark plugs.
Coil pack.
MAP sensor.
Lambda sensor.
And now an Exhaust Manifold


Whilst de-coking my lambda I noticed two cracks in the exhaust manifold. Would this be the culprit of all my issues?

Edit. Bought a second had manifold and cat and the issue still persisted. Seems to idle better though...

[marcusd]

well from my past cracked mani i didnt get any mis fires at all, but it did drink fuel like a tank, and it was a good inch hole at the top of where all branches meet.
when i had the mis firing later on it was due to coilpack, but replaced map, and idle valve and problem aint come back.

[Lukus-vtr]

Thanks Marcus,

Anymore advice bump!

[dannysaxohartshorne95]

I work in a garage and we had a ford in (I know its not a saxo but it works same) it had a bad misfire, we tried everything from spark plugs all to emptying the fuel tank incase of contamination, after a good look around I found a slight crack in the manifold, for a cheap fix I bought some stuff called quick steel, all you do is grt it and mix both parts off the quick steel together then I put it over the crack and it went solid, this sorted the problem and it is still ok to this day, the quick steel will only be any good depending on the size off the hole, hope this helps

[Lukus-vtr]

Thanks Danny! If it does fix it then it will be a big relief!