My engine is too lean! how can i get more fuel from the mfi?
28-06-2010, 09:26 PM
#1
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My engine is too lean! how can i get more fuel from the mfi?
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!
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!
Last edited by sonmic; 03-07-2010 at 06:35 PM. Reason: video and new problem!
29-06-2010, 01:10 PM
#3
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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
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
29-06-2010, 03:18 PM
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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
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
! 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!
Last edited by sonmic; 29-06-2010 at 04:03 PM.
30-06-2010, 03:08 PM
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01-07-2010, 07:42 AM
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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.
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03-07-2010, 12:21 PM
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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.
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.
Last edited by DazC; 03-07-2010 at 12:22 PM.
03-07-2010, 02:57 PM
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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
03-07-2010, 03:18 PM
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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!
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!
03-07-2010, 04:01 PM
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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.
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.
03-07-2010, 06:44 PM
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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!
03-07-2010, 06:52 PM
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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.
You may also have wiring issues to your fuel pump of a blocked fuel filter.
03-07-2010, 07:03 PM
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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.
You may also have wiring issues to your fuel pump of a blocked fuel filter.
And thanks for all the help!
way better than here in norway :P!
03-07-2010, 07:23 PM
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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?
Only this movie atm, can toss a picture later
!Would a grp.A pump be the thing? also where can i get highflow fuelfilter?
Last edited by sonmic; 03-07-2010 at 07:31 PM.
03-07-2010, 10:17 PM
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So if make it richer it won't help?
Last edited by sonmic; 03-07-2010 at 10:18 PM.
03-07-2010, 11:44 PM
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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?
Last edited by tasos77; 04-07-2010 at 12:00 AM.
04-07-2010, 12:20 AM
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04-07-2010, 04:57 PM
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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.
04-07-2010, 05:02 PM
#28
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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.
I think, from memory mine are -3 but not 100% sure.
05-07-2010, 01:03 AM
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lol
05-07-2010, 10:15 AM
#35
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?
05-07-2010, 10:25 AM
#36
In a nutshell, at any given pressure we would have supplied FAR more fuel through an injector supply pipe twice the size.
05-07-2010, 01:07 PM
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Would be a big problem replace the original fuel hoses if they break, not uncommon after 20 years old RS turbos..................
05-07-2010, 01:20 PM
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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.
In a nutshell, at any given pressure we would have supplied FAR more fuel through an injector supply pipe twice the size.
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.
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