Opel Astra Merit 16i from 96

Hi:

I have an Opel Astra 16i from the year 96, the case is what I did cook for acknaked joint.

Send the cylinder head to the Tornero, to rectified and frosted from the valve seats.

Now the car makes me strange things for example:

temperature rises and lows very fast, that is, it does not maintain working temperature, I have changed the thermostat and it seems that the temperature changes are less abrupt but still exist.

Then the xibato of Averia ignites me, it does not register in the UCE, but in view it seems that there is a small cylinder failure, because the engine makes a small tremor, as if it were decompensated.

The emergency system is activated, and is maintained at 500 or 600 rpm in idle.

After a while the emergency xivato disappears and the idle returns to normal 900Rpm, although the engine remains decompensated.

What could it be?
Injector pump, injector, depressor circuit, or some valve that has not been good.

I have not been able to do the compression test yet.

The ideal would be to measure compression, although because of what you say I would not have much to do, what I would do would be to check all the ground connectors and cables to want is only this and obviously affect sensors and watches,

Hi, you just read your problem with the Astra, you looked at the height of the pistons for the new Board