right,

when i bought me van it had the boring black clocks without a rev clock.

one set ofgti clocks later and a bit of wire to the ecu and hey presto, we have a rev clock.

now it was working fine, same as my mates old escort td, 750-850 rpm at idle, 2500rpm in 5th was 70mph.

ive since upped the boost on the van, i cant be accurate of how much as my new turbo gauge was reading 13psi before and is still reading 13psi now!!! (a problem for later).

now when driving sensibly the rev clock acts as it should, but when you plonk your foot down it flys round past 4500 revs, ease off and itll return to where it should be (you know how it works and what it should be reving at in a particular gear at a certain speed), it raising and lowering at the same time as the turbo gauge? it sdefinetlay not the engine screaming away and slipping on the clutch.

any ideas why as its really doin my head in now.

 

checked ur wireing

wind the boost back down see if it sorts it out again

 

When the tachos go dicky, they can either stop working completely or get mentally sensitive to voltage fluctuations, particularly lowering voltages, as the tacho is nothing more than a volt meter with a different face, I would be tempted to check all the earths around first.
The sierra clocks are famous for this, but mostly caused by dodgy digi/ani eprom.
tabetha

 

sorted it,

i unplugged the crank sensor to drop the cat whilst fitted a bigger turbo.

forgot to plug it back in.

i feel like a right plonker

hey tabetha have you any experiance with fitting electric windows and central locking to an escort van?

thanks in advance

 

Cl and lecky windows to a van, no never done that one, but have done on others.
The CL I use is just the basic maplins kit(£20) for 4 door cars, even for a two door car, just don't use rear ones, never had a problem, spare motors are around £6-£8 if needed, I never have, vastly more reliable than the ford CL, maplins one can be linked into car alarm for remote CL as well, nothing extra needed.
tabetha