944 turbo s (silver rose )

[GPF]

Hi Gareth,

Have you got any further with this?

From what you have now said, it looks like your FPR and Vac pipes are not the problem and you have the correct injectors so there must be something else causing it.

You did say that "there does seem to have been a bleed valve on at some point and I have had to block the vacuum off to where it went too, But I don't think it has ever run properly since I have owned it as someone has taken all of the bits off."

Exactly where was this and what did you block off? I wonder if it should be connected to something rather than just blocked off?

When you say it runs better on fqs2 do you just mean the idle emissions, or actually how it is driving? You should be lean everywhere if you are still on fqs2.

Can you expand on the kangaroo juice?

Have you checked the TPS setting? With the engin stopped you should hear a click from the TPS as soon as you start to open the throttle by moving the cam where the cable runs to. This is a micro switch and is how the DME knows to switch between the idle maps and the part throttle maps.

 

[gaz924s]

ORIGINAL: GPF

Hi Gareth,

Have you got any further with this?

From what you have now said, it looks like your FPR and Vac pipes are not the problem and you have the correct injectors so there must be something else causing it.

You did say that "there does seem to have been a bleed valve on at some point and I have had to block the vacuum off to where it went too, But I don't think it has ever run properly since I have owned it as someone has taken all of the bits off."

Exactly where was this and what did you block off? I wonder if it should be connected to something rather than just blocked off?

When you say it runs better on fqs2 do you just mean the idle emissions, or actually how it is driving? You should be lean everywhere if you are still on fqs2.

Can you expand on the kangaroo juice?

Have you checked the TPS setting? With the engin stopped you should hear a click from the TPS as soon as you start to open the throttle by moving the cam where the cable runs to. This is a micro switch and is how the DME knows to switch between the idle maps and the part throttle maps.

I have checked all of the readings from the tps and the micro switch is working ok

It seams to be running fine on fqs2 but I meant the emissions were better.

With the bleed valve there is a vac pipe which goes from cycle valve to waste gate this has been t'd into and there was an open pipe stuffed beyond the brake master cilinder which I have blocked off !

 

[gaz924s]

Oh and as for kangaroo juice it seems to be jerking on overrun when off power coming down bank which it has never done before

 

[GPF]

So if you open the throttle with the cam and then slowly return it to the closed position, you hear the click from the micro switch just before/as the cam gets to the stop?

And it's running ok now? A bit of a crackle on overun is probably ok, but no more kangaroo juice?

There must be something causing the high CO readings - hopefully not simply engine/rings/valves related!

Understand the blocked off vac pipe now though.

 

[GPF]

crossing posts - lol

Does it do that on fqs0 too?

 

[gaz924s]

Not tried it on fqs0 yet for any time as I only noticed it the other day and havnt been out in it yet as the windscreen wipers broke and this just ain't the weather for no windscreen wipers so part is on way and will try tomorrow weather permitting

Will be going silverstone classic on fri so should give me chance to give it a good run and see what happens and yes you can hear the switch oon the tps and have checked all resistance values against my brothers and are all withing parameters

 

[GPF]

Ok.

On other thing springs to mind - it could be the injector drivers in your dme are playing up - have you swapped dme boxes with your brother's?

 

[gaz924s]

Are we talking the dme ecu here ?

 

[GPF]

Yes - the actual ecu box that the dme chip goes in, with the fqs switch in the side.

 

[gaz924s]

I have tried his ecu with his chips in and it was similar to mine now on fqs 0 4% and 1.5-.8

 

[GPF]

And you also said you had your injectors tested and cleaned didn't you.

So it's not those, your fuel pressure is ok, it's not your ecu, or the chips, or the TPS.

I assume you have changed the plugs and air filter and tried swapping the leads, dizzy cap, and rotor arm?

Is the tailpipe sooty or not? Rather than just testing the CO% can your mate read the AFR?

The only other thing i can think of just now is if your breather is perhaps blocked - maybe test it with the oil filler cap off to see if it changes it?