Keeps cuting out ..

[starrzzy]

Now that i have the starion on the road and i have been using it for a few days..
I have found that going down the freeway at about 80- 100 k and take my foot off the gas the car seems to die.. Boot gauge drops to -10 cm..

If i stop.. it want idle .. keeps wanting to stop / cut out ..

Have checked all vacume hoses ..

Have also noticed that in the morning when the car starts .. the boost gauge runs @ -10 cm until car starts to warm up ..Is this normal ??

Replaced thermostat today as the other one was open all the time .. but still had the problem of it wanting to cut out...

Not sure where to look next .. as have replaced leads, plugs, fuel filter.. (have i missed a filter)

Your thoughts and suggestions as to which way to go ..

Thanks

Barry