Hi All
So its been some time since I have used the forum and I am looking or some help/ Advice please.

My Mk3 Escort has a 1.8 16 Valve Zetec.

Std Rad inlets and outlets but alloy

Alloy header with bottom and top in/outlets.

I also have my heater matrix piped in.

So the car starts and runs fine the warms up slowly by the way its running Megasquirt. It continues to warm up and get hotter and hotter until the fan comes in. I think this is kind of ok
I also think the coolant pressure gets a little high. Its not blow any pipes just yet.

So the real problem I get is when driving. The coolant temp gets quite low to the point that MS goes into warm up enrichment (i.e cold start) the max temp is 60 deg so it must be getting to cool for it to come back on.

This causes issues then I come to a stop with the engine at high idle.

Iv been though all the little bits but I am now thinking that because I have the heater matrix piped in I am some how bypassing the thermostat so the engine will not maintain 90Deg

I will do a drawing of my coolant system later BUT any of you out there with a drawing of your coolant system you are running. OR are you sort of running the same and it dose the same.

Cheers Ferd