The Chief

Cars being doing this for a while now - whilst holding a steady throttle at say 2000-2500rpm the car seems to be hesitating and tends to be a bit jerky - also say in 4th with my foot to the floor it accelerate like buggery then it will stop for a split second - but it literally is like hitting a brick wall.
the other is a very intermittent idle - as if its gonna cut out (it doesn't)

I'm thinking my lambda sensor, or could be my MAF sensor (although this was replaced around 18 months ago)

Car is a MY99 classic - full decat, sti panel filter, resonator box removed, sti uprated fuel pump and a Andy Forrest remap.

Any help greatly appreciated

Cheers

New_scooby_04

iTrader: (4)

Lambda sensor would be my guess mate.

Was your resonator box removed when you had it remapped?

Ns04

The Chief

Yes did all the mods before the remap.

going on a run tonight - will i be ok??

jaydut

could it be somethin as simple as dodgy plug or coil as i had a similiar prob on another car and it was a dodgy coil pack

Heple

Sounds like the Lambda mine did this on my MY99 UK Turbo.

Replaced it with a universal one from here :

http://www.gendandirect.co.uk/product_O23WIRE.html

Its fine now.

Worth a try for £30.

Or

£43.45 for the better Bosch LS 02

http://cgi.ebay.co.uk/BOSCH-UNIVERSA...QQcmdZViewItem

Craig

The Chief

So this will fit a MY99 Classic will it???

cheers for that

Heple

Certainly will

I bought an AFR guage after i changed mine, it helps spot Engine/Lambda issues, definatly worth the pennies. (its already dianosed a weak fuel pump on mine)

Hope this works otherwise your prob gonna be down the dreaded MAF route.

Craig

Heple

Just a note,

This is a universal lambda, you will need to wire it in yourself as it will not come with a plug.

It only requires cutting the 3 lambda wires and connecting the new lambda wires maching the colours. (i used bullet connectors as soldering doesn't work well becuase of the high temp wire).

Craig