Willem

For the past month the car had been running nicely, but when it came on boost, the car wasn't completely good, nice, but not 100%, so, today I said to myself, lets turn up the fuel pressure.

Wrong idea, car ran like shit again, so, lets turn it like it was, no reaction, got even worse...

Only thing I took apart is the electronic fuel presure regulator and I unplugged some connectors to mount the fuel pressure gage.

After some toying around, it didn´t get better, so I hope some of you have some tips where to look and how to do it right for once

Thnx in advance

Willem

Forgot to mention something, on half throttle it runs fine and even the AF reads ok, but when I put my foot down, it immediatly starts to run like a bag of shit.

It has been doing this before except for the AF being quite ok for once(on half throttle), and after taking some things apart and putting them together without any changes, it was fixed, sort off....
Who knows what can be wrong with the car, except for me being the driver...

Cheers!!

SafeChav

Is this MFI???

Willem

Yes....

SafeChav

How the fuck did you turn up the fuel pressure

gup

iTrader: (1)

have you checked the spark plug gaps as these could be to big

Willem

Haven't checked them lately, how much should they be, bearing in mind I'm running 14-15 PSI of boost....IF that makes any difference.

gup

iTrader: (1)

my series 1 was well fussy on the plug gaps fords recommend 1.0mm i think i had to run like .8m i think ill check on my feeler gauges later for you mate does it back fire on full throotle what happens as you say it runs like a bag of pop

Willem

It's a little hard to discribe, but it sounds like a boxer, or if it's running on 3 cylinders, very strange sound....
I'll test some things in the afternoon so then I'll make a vid off it, maybe you recongnize the sound and tell me what's wrong.

gup

iTrader: (1)

it could be a lead breaking down fella
on the plugs check that the silver tip where the leads slips on is not loose

Maki

haven't you heard about electromagnetic fuel pressure regulator and a little hole for the alen key in it ?

To Willem I had similar symptoms with one HT lead being broken....

SafeChav

Yes, but thats not technically the fuel pressure, thats more to do with enrichment. And im sure they have a slotted screw in the back

Maki

Slotted screw is just the cap of real screw inside tweaking it raises fuel pressure at boost

SafeChav

Ah ok, your one step ahead of me there then. I don't like fucking around with things like that, would rather leave it to a RR tuner

Maki

I don't touch it myself either But it's good to know things

Willem

That's what i've done....
The only thing I know, what more options are there then??
I once heard you add a ring somewhere and the fuel pressure raises too, so how's that??

Maki

My first question would be, what makes you think you need more fuel at the moment?

One more way to increase fueling is to connect vacum/boost small rubber pipe (like the one used for ECU boost signal or boost gauge) from crossover pipe to FPR (fuel pressure regulator)
P.S. don't expect to see very big increase here

Anyway let's get back to my first question

Willem

Well, when the boost comes up, my AF gage turn to fully lean, and it makes a kind of a hollow scream out of the exhaust, something it didn't use to make.
I don't why it is bugging me, maybe because I mounted a cos intercooler and it now gets more air or something.
It needs to be fixed anyway...

Maki

Your AF gauge is connected to wide or narrow band lambda?

SafeChav

Seriously, without sounding patronising, get someone who knows what they are doingto set it up. I know you are probably keen to learn, but learn from someone who knows exactly what to do. Twisting random screws and hoping for results quite often ends in tears

gup

iTrader: (1)

none of the pipes are soft are they as they could be getting sucked in when on boost

Butchi

I have the exectly the same problemwith mine.
I want you to do something.
Go out and start the engine. Get it out on the road an take full throttle when the engine is cold, it must be cold. If the car goes like a rocket then it is the fuel. You dont get enough fuel.

I know we dont like to run oures engine when its cold but try this onceand write back to us, ok?

I have a plan for it then.

Best regards from sweden, Butchi

JamboRS

yeah good idea mate
yeah mate write back to him,that youve just blew the fucker up or shortened the life expectancy of both engine and turbo,whats yor big plan when that happens

anyway get it to a tuner and learn from them,theres fuck all worse than learning the hard way

SafeChav

The odd once should be ok although its a very crude idea none the less.

Still, glad to see someones learnt their lesson about ragging the fuck out of it and hoping for the best

JamboRS

turned out to be the breather not being upto the job and it had filled my intercooler with 2 litres of oil and i didnt even know,thing is i would have never have found it had i not takin to a tuner hence the reason he should take it to a tuner

and for the record ive never once booted my car from cold,its always well warmed before it see's boost

Willem

Take it to a tuner, the nearest tuner is about 100 miles away, these cars aren't used anymore over here...
And honestly, I can't pay 250 quid for letting it set up....
Yesterday and today I didn't drive the car as I had some parties, which would have been a nice step in letting it set up financially, but that didn't happen

Hopefully I have more to report tomorrow, or actually, today...

gup

iTrader: (1)

check that the compreeser wheel is tight and secure as my series 1 could twist a little and that made it run like shit also screamed out of the exausht when giving it larrys

SafeChav

The compressor wheel???

gup

iTrader: (1)

oooops that was suposed to be the housing it was a bit loose and could twist

SafeChav

khanny

i know this might sound trivia but have you changed the fuel filter try that my old xr3 was running like it was on 3 cylinders i changed plugs, leads had the injectors clean and it turned out to be the filter cost me loads for the sake of a tenner

Willem

Fuel filter was changed when I bought the car, that's 5000 miles ago, can't imagine it being that dirty yet...

I made a small vid yesterday, here ou can see it goes lean as soon as I touch the throttle... As for the sound, on my laptop I can't hear the hollow sound, but maybe you do...
http://www.xs4all.nl/~famvelde/RST/MVI_0997.AVI

Arjan

looks to me like a narrowband lambda? you just cannot rely on getting the actual a/f ratio, they are inaccurately, when u turned up the EMPA,did the narrowband gauge read under stoich when on boost?

Willem

Yes it is a narrowband sensor, and I know they are not excactly great, but when it reads lean, then it is lean, whether it is wide band or narrowband.
Also the car pulls crap, as you can see probably...

And it constantly reads lean on boost, but when I changed it, it stayed till half throttle on the rich side, but the engine wouldn't idle anymore....

Arjan

yeah by the looks the turbo should kick in a bit harder from about 2500 rpm..

when you turn up the EMPA it enriches the mixture when on boost, actually on the whole rev range, to get the car idle right you need to get your CO right to the point yr satisfied with it, this is done by turning the allen key in the metering unit(imbus in dutch)
just turn the pressure up and do a test ride to check if it pulls better ON boost, when not on boost the car will be too rich and might drive like a bag of shite but at least you know then its fuel related prob,
you can then set up your metering unit more precisely,start off by setting it up as it should be from factory(plate position, pressures,etc),then turn up the EMPA 1/8 turn at a time to the point yr a/f gauge reads rich under boost. but as this is a a rough setup you might be better off having that done by a decent rst tuner ( which holland is lacking )

SafeChav

Well either way, you've got something quite drastically up, and driving it while its running lean, sooner or later you are going to either pop the gasket and/or melt something..........

Willem

Finally someone who knows my position
I now have 2 EMPA's so one is std, the other one for screwing around.
One question, turning the EMPA clockwise, it enriches, turning it counter clockwise, it leans out, is that correct???

SafeChav

Just be very careful, narrow band AFR's aren't anything to be relied upon, wouldn't want you to end up having to repair your engine.

Willem

Me neither
But as those things only know rich or lean, and it reads lean, I think it helps me