yanrs

Why is this can anyone explain in detail?
TIA
Yan

Anonymous

yeah its ment to, if it didnt stop running when u took it off you would have a problem, then motor works on back presser



thats what i got told anyway, there guys will tell u more

Lee @ Fusion

Yep tis a good signe not a bad one

The TST system relys on vacume and pressure , its all linked to the metering head needin vacume to hold the flap open slightly .

If u remove the oil cap you disturb this balance and the engine will stop

yanrs

ta

JesseT

Same thing in english:
The inlet manifold is connected to the block through the crankcase breather. So, when you remove the oil filler cap you are letting air into the inlet manild through it. This means that the air is not going via the air-mass meter and therefore no fuel will be injected, thus the engine dies.

dave green

Yep that sounds about right

Anonymous

So wat abt if u take the oil cap off and the engine does'nt cut off then, wat does that mean??

Rick

it measn that its isolted from the metering head. Either hasa modded breather system, breather is blocked, or running very rich.

John Laverick

Mine had a modded breather system, i.e. the breather port on the metering head is blocked up. Therefore mine still runs if you take the oil cap off.

vroooom ptssssh

mine has a moded breather to stop my turbo smoking pmsl, but still works on vacum and cuts out if u take cap off!