hi,


After my engine rebuild (1.6 cvh turbo standard) I can't set up correctly the idle, when I start the car it can't idle the car is dying but she runs fine, and sometime there is noprob the idle is correct ...
The screw for the idle is set up near to the max
My Co is: 0.11 is it correct ?
does somebody have an idea ?

thank you for your help
sorry for my english :s

 

Might be an air leak somewhere check all the pipes make sure ther tight and on properly

 

It deffo sounds like an air leak!

 

Air leak.........can you hear high pitch noises in the engine bay?

 

As above, check for air leaks. Also have a look at the flap in the metering unit to make sure its not sticking and make sure the one way valves in the engine breather pipe and brake servo pipe are operating correct.

 

thanks all !
I checked, there is no air leak
On cold start the car rev at 2000-2500 rpm 5-10seconds after the revs drop and diyng :/

I didn't test hot start or trying to heat the engine at normal temperature

 

Can you identify what you are losing/why the engine is cutting out at all?

Fuel related?

ignition related?

 

Reading your origional post, with the air screw at max and the co reading you have i would still go for an air leak somewhere.

 

If you unscrew the idle screw too far it makes a fairly substantial air leak.

Reminds me how much i hate MFI

 

I rescrew the idle screw, it's better but it's still diying :/

its not an ignition problem, I didn't touch distributor etc.

I will recheck for an air leak tomorrow

 

Runing a bit on the lean side aswell, wont be helping

 

CO 0.11 Is veery lean

 

yup 0.11 is too lean, mine was running lean ind wouldnt tickover on start up so i turned the mixture up and its ok now, manual says it needs to be on 0.5 +- 0.25

 

Jesus you are lucky it is even running with the idle so lean.
Forget air leaks, no ENGINE IS GOIN TO RUN THIS LEAN.
Reset your CO to 2% ie 2.0%, then see all your problems gone.
It is really trying to run on air, turn your idle CO screw so that it is 2%, the reason it is needing so many revs is because this moves the flap allowing more fuel.
tabetha

 

thanks for your advices
in the week I will seek a specialist to configure CO to 2%
I'm really lucky ... I didn't run the car, just idling !

 

Can I set up the CO without "CO meter" just for test ?
I found a Technical Contro Centerl (The MOT in france) which can help me in the week, but I must make ~15miles to go there, I'm very lean I don't want fo**** my engine newly rebuilt :/

 

get it on a CO analyser, any MOT testing place (or your equivalent) should have one!

Its not a rolling road tune and doesnt guarantee your fuelling at high revs/boost but you can set the idle emissions up as a starting point!

 

Can someone tell us where abouts this idling control is on the metering head,as My car idles at 1200 RPM and I need to slow it to 850RPM so I can do the timing as I've fitted a new dizzy.A picture would be even better,thanks in advance,Micky

 

jack of al trades- You can set up by yourself idle mixure, you turn little clockwise, and go to MOT. I think you cannot break nothing because co screw hasnt much with driving under boost and fueling udder boost (i think)

 

Its actually on the throttle body, same side as the TPS. Big screw on the underside you can't miss it

If its idling high though you may find your auxiliary air device is stuck open, high idle on an RS is very unusual