The_Machine

What can cause this, tried a new ICV but no joy the revs came down but it still didn't run right, no air leaks and checked the blue sensor.
Could it be a bad TPS???

studabear

can you check your tps operation on the tuning software for your ecu?

What management are you using?

BigErn

What car is it?

frsjon

got to be a air leak

The_Machine

Not sure it can be checked via ecu, I'm gonna call the tuner tomoz, it's on a Escort Turb, I have been advised of an air leak but I can't see one.
Gonna have a proper look with It ticking over on a deserted pub car park this week.

studabear

John its Jamies old S2 with new management.

frsjon

surely a vac pipe/split..dodgy gasket somewhere.. lovely car though

The_Machine

Thanks Jon, avin a look

martysmartie

iTrader: (1)

Air, this is the only thing that can increase speed!

So you have an air leak, or the throttle is open.

I assume you have disconnected the ISCV to see if there is a difference?

Martin

The_Machine

Hi Martin,

Yes disconnected and no diff, I've squirted the whole top half of engine with clutch and break cleaner to find any change in the engine note and no diff, I took off the boost pipe that goes to the ecu and boost gauge and it makes big difference so I guess it's connected to that. Going to have to source some thin pipe from some where to do further tests.

GVK.

I doubt a 4mm pipe leaking will make it do 3000-4000rpm, must be a massive leak (brake servo/pipe?) to make it rev that high.

Is the throttle closing?

The_Machine

Yes I thought that, the butterfly's shut going buy the lever on the top of the engine but I haven't had a physical look yet.

martysmartie

iTrader: (1)

It is possible, an engine under no load needs very little air to increase speed.

Do you have a D/V?

Also from what you are saying your reference hose is shared with the boost gauge? This is not good practice, the MAP sensor, along with the FPR should have a dedicated connection!

Disconnect the boost gauge and see what happens...

Martin

The_Machine

I'll try it! But no DV, I think it's also ICV connected,
Cheers Mart!!