I'm running lean! how can i get more fuel!?

Everything is in working order. What the hell can it be? Getting pretty sick of my car, the urge to burn it raises!
http://s265.photobucket.com/albums/i...t=IMG_0603.mp4

Click link to see vid! maybe this will help, i recommend a good headset or good speakers to hear it!

 

Go get it set up by a pro, anything could be to blame.

 

I had the same problem. After replacing everything like you have done I notice when the car was cold, it went great. Than after 2 min when the car engine temp indicated warm to the ECU, it dident run proper anymore.

It turn out to be the fuel. It dident get enough fuel. I changed the fuel metering head and the fuel pressure regulater and WWHHOOOOM!

The car gives more fuel when cold so that why it went good when cold.

BR Butchi

 

Well I have changed all that too ! but it dosn't run better when it's cold. so i need to take it to a pro. But there aren't any nearby! so what to do what to do!

 

hei. Har du prøvd å plugge av den svarte styreenheten til ke-jetronicen og sett om bilen oppfører seg anderledes da?

 

Skal prøve! Er det farligt visst jeg tar en prøve tur?

 

Systemet funker bare som k-jetronic da. Så er ikke så lurt å straffe den max da den kanskje ikke får nok bensin. Men du finner ut om noen av sensorene er gåene som styrer bensinmengden.

 

BUMP! check vid at top!

 

Did you check fuel injectors??

 

Call lee at devil uk 01903 731194

 

IMO Your lean mate.

He's in Norway! lol

 

It could be lean. You nead an AFR gauge on it to make sure you're around 11.9 to 11.7:1 AFR on boost. You could also be massively rich. If you're straying into the 9 point someting to one area, then you will be getting rich misfires.

If you are fueling ok on boost, then check the valve springs/cam lobes. I have had instances of weak valve springs being forced open under boost.

Also set your plug gaps to around 0.6mm to make sure you're not suffering ignition blow out.

 

as above fella my old s1 sounded just the same as yours and it was my plug gaps where too big i made the gap smaller and it was so much better after

 

Well alot more tips with video will remember that!
I'll adjust the plugs, have them on factory standare 1mm, so down to 0.6 and have orderes a lambada sensor since i'm making a new exhaust!

 

If i use the enginento brake it will cough alot? Rich or lean problem, taking the plugs out as we speak

 

Saw on the plugs that the engine was lean! how can i get more fuel?! without a 5th injector. ( have one laying around, just need to get fuel from somewhere!

 

On the electromagnetic fuel pressure actuator on the side of the metering unit (rectangular device with a 2 way plug, usually either black or grey, held on by 2 or 4 screws, I can't remember), there is a screw on the face of it that is flush up to the metering unit body. Remove the electomagnetic actuator and then remove this screw. Underneath the screw is an allen key. Adjust this (can't remember which way to adjust it. One way will weaken in and the other will richen it) and take it for a run. You really need AFR equipment though as you could cure your problem but still be running dangerously lean.

You may also have wiring issues to your fuel pump of a blocked fuel filter.

 

Think i have a standard fuel pump. Wich should i get?

And thanks for all the help! way better than here in norway :P!

 

Do you have a pic of your engine bay?

 

http://s265.photobucket.com/albums/i...t=IMG_0269.flv

Only this movie atm, can toss a picture later !

Would a grp.A pump be the thing? also where can i get highflow fuelfilter?

 

Put the standard fuel lines back on, the wrong braided fuel lines are a bigger diameter internally reducing fuel pressure to the injectors.

 

Correct, thats EXACTLY why I wanted a picture. Those lines cause massive leaning.

 

oh damn! >_< ripoff! so i should take the standard back? now i have to but new ones! and fit them! it's hell!
So if make it richer it won't help?

 

Water temp sensor on the ECU side of things. The one with 2 wires giving the ECU a false reading when warm. £8 I think I last paid for one.

 

8 for a new one??
for 19,99 i bought a full sensor kit last week, used from ebay but they working fine!
Also about the gap, a group A coil couldn't help?

 

Fixed the gap and i'm running a grp. A coil!

 

are all makes of them braided fuel lines crap? worrying now cos ive got a full car set on and mine is lean..just been put back together so does need setting up aswell..i bought mine off rscustom hoses off ebay and he said they wereused on a 280bhp rst ok.

 

got me worried aswell, although when my car was set up at NMS with them on they managed to get the fuel okay at 20+psi so would suggest the pipes are okay.
I think, from memory mine are -3 but not 100% sure.

 

Surely if you have the car setup the EMFPA will be set for whatever fuel lines you are running anyway? I could understand if you have just changed to them and are having probs though of course.

 

I'm going to a pro this week to see what we can work with! Will update you all

 

Its not that simple, overcoming a flow restriction with pressure on a KE system would require you to run massive pressure and thus it would need to be uber rich at all times to compensate for the restriction posed at time of high demand.

 

As is always the way with MFI Stu! lol

 

From your postings your obviously pretty clued up so I did wonder why you initially suggested otherwise?

 

I knew i should bougth the blue car with efi well well! i need to think of an new engine!

 

I assumed that the problem would be relative...
So if it's lean at full load WOT because of the hoses that trend would be present through out the the entire load range, and a pressure increase would solve it?
Or is it that the problem only makes itself known at high load when larger amounts of fuel are needed, like on an EFI car when you reach the limits of the fuel pump for example, fine low/mid but lean higher up?

 

Yes, thats exactly it. When we set the EMFPR it is adjusted to get a good balance between cruise and full load fuelling, thats KE's only real limitation. Now at low load and cruise the current pipes may be fine at standard pressure or a little above because we aren't actually trying to send much VOLUME of fuel through the pipes, but when we are flat out and all metering slits are exposed, thus requiring all the volume of fuel we can flow, the pressure we have chosen is not going to be enough due to the flow restrictions presented by the smaller bore pipes.

In a nutshell, at any given pressure we would have supplied FAR more fuel through an injector supply pipe twice the size.

 

Yeah of course, cheers Stu!

 

So if the braided fuel lines are the problem, What would be the correct size for braided fuel lines??
Would be a big problem replace the original fuel hoses if they break, not uncommon after 20 years old RS turbos..................

 

Hi Stu

I sent you a P.M. about MSD chip on past June 14th and I´m still waiting for your reply.

Many thanks.