X5 Calibration help

[PAWEABMW]

Hi everyone got the kit installed on the X5 ok i have a few problems,on switch over the blue light flashes on the dash switch then only switchs over after about 10 sec.....also when driving it runs fine on gas until about 60mph where it hesitates and the car CEL light comes on with an error code bank too lean....... once the code is cleared via INPA it runs fine again until the same 60mph...........i noticed the lambda readings seem a bit low........do these settings look ok guys...

[Gilbertd]

Can't help with the calibration and not sure if the pics are clear enough for anyone else to either. When you have a screen displayed, hit the PrtScn key, then open whatever you use for pictures (Paint if nothing else) and hit paste. Then the screen will be saved as a picture that you can upload.

[rossko]

Did you connect the lambda sensor wires, how does their display behave on petrol?

You'll remember the talk about injector nozzle sizing/drilling, that you weren't going to do it but see how it runs. This is your results from that trial.

[PAWEABMW]

Thx for the replies sry bout the pics lol the lambda readout seems flat on the graph between 0.00 and 0.21 cars runs like a dog on gas with the cel light comming on also stalls on gas when i approach traffic lights,the cars error code is system too lean i tried enriching the gas mixture via the calibration screen with no luck i'll pop some clearer pics up

[PAWEABMW]

Seems to idle fine on gas,i swapped the lambda wire around as they diddnt seem to be doing much.....

[Gilbertd]

Look at the gas times compared to the petrol times, the nozzles are way too small. Gas wants to be around 1.2 to 1.5x the petrol times, not nearly 3x.

[PAWEABMW]

Thx Gilbert for the reply i removed the brass nozzles from the omvl injectors,ran a bit better still stalling tho approaching traffic lights and at speeds above 50mph and kicking the cel light on.......i also dropped the pressure to around 1 bar on the reducer....no difference.......getting these errors tho......

[PAWEABMW]

The reducer temp seems way too low also.......what is the optimum temp anyone ?

[PAWEABMW]

Still no joy can't seem to adjust the mixture inthe map program as the program only begins mapping at 50c reducer temp my reducer cant get past 45c............is this normal guys ? also what would be the ideal pressure for a 3.0l six cylinder engine ?

[PAWEABMW]

Reducer is way too cold after 45 mins of driving on petrol the reducer temp still wont go above 45c i checked the hoses going into it and they are boiling hot but the reducer is freezing to touch any ideas anyone ?

Also the error message i keep getting is loss of rpm signal....i taped into the coil but im wondering if BMW coils cut power at alternate intervals i've heard some systems do this........

it will idle on gas no problem and drive at slow speed on gas fine.........only when i exceed 40mph it starts stuttering............

Also i noticed its trying to start on gas ? WTF ....LOL took about 10 turns to start then i realized it was trying to start on gas.....no idea why the switchover parameters all look ok .......

Cant even get the mapping screen up as it needs to be done at temps over 50c.......grrrrrrrrrrrrr.........gonna be fun

[LPGC]

This thread follows on from the thread at http://www.lpgforum.co.uk/viewtopic.php?f=33&t=13484. Just in case anyone wants any background info..

You have removed the nozzles like I advised in the other thread - good.

Your reducer temp should be hotter than 33deg. But since your gas temp is showing 44deg, then either the gas is warming up dramatically in the engine bay, or the gas temp reading is also wrong, or the reducer is in fact running hotter than 33deg.. Since gas loses heat when it turns into a vapour, and since the gas entering the reducer is only at ambient temp, the gas temp out of the reducer will always really be cooler than the reducer temp... How hot is the reducer to the touch? Luke warm and maybe it really is only 33deg. Uncomfortably hot to hold the reducer tightly and it is a lot hotter! Select a different reducer temp sensor until the readings show a realistic temperature...

Now start everything over again - Reset the ECU. Set all the basic settings including the reducer temp sensor that showed realistic reducer temp. Set 1.1 bar working pressure in the system if you can, or the autocal will just detect your 1.1 bar anyway.

If you had any OBD errors on the BMW, drive it around on petrol for a bit,leave it idling for a bit, go for another bit of a drive. Then go through the autocal procedure again. BMW's don't seem to settle into their usual set of fuel trim registers until a while after OBD codes have been cleared.

Simon

[LPGC]

Our last two posts crossed. You have probably plumbed the reducer in wrong, or get an airlock in the reducer.

And if you set a reference pressure of 1 bar, the minimum gas pressure shouldn't be 1 bar, a goof figure would be about 60^ of that, so maybe 0.6 bar.

Simon

[PAWEABMW]

Right on the money Simon man thx....was indeed an airlock in the reducer....... disconnected and reconnected the pipes,bled the cooling system the reducer temp sitting perfect now 65c ,running like a charm now sweet no flat spots lag or errors, full power thru out the rev range magic............thx for all the replies folks......

[LPGC]

That's great mate!

But I do suspect you haven't finished the calibration yet,... Like I said before, BMWs can be a bit fussy, particularly they don't always allow the long term trims to shift at idle until quite a while has passed since you last cleared OBD errors... Could be that when you start the thing in the morning with a cold engine, the system switches to gas and you'll have a few problems - hopefully not though!

Why was the gas temp showing 44deg when the gas temp must really have been much lower? You may have to get that sorted, because the system adjusts the Ginj according to gas temp (temp and pressure effect density, which the system compensates for). Why were you losing the rpm signal etc?

Cheers,

Simon

[PAWEABMW]

Hi Simon i think the wiring may have been at fault for the rpm signal, seems fine after i resoldered it,i'm just hoping its not a bmw thing that shut the coils off from time to time as i've heard happens on some cars.......not sure about the gas temp makes sense tho..... strange,maybe because the engine bay is hot the x5's run super hot,took it for a nice drive there seems great at all speeds and loads however like you say tommoro's another day lol

i followed the lpgtech video for calibration but for some reason my software doesn't seem to have the calibration slider for the mixture just dissapeared was there on Fri......,and the lambda values don't seem to be doing anything sitting at 0.00 or 0.21 from time to time,also i have a red vertical line that just moves back and forth doesent seem to be doing any mapping lol ........never had to do a calibration before so should be fun...thx again for all the replies man...

[hardcorepit80]

i think the wiring may have been at fault for the rpm signal

Set you RPM signal to around 5V

i followed the lpgtech video for calibration but for some reason my software doesn't seem to have the calibration slider for the mixture just dissapeared was there on Fri

Slider is on "Bars chart" tab other slider is just for idle mixture and it disappears when come off autocalibration screen.
You must have connected wrong lambda sensor, VIOLET wire to BLACK wire on sensor.(or check Car Settings tab).
Also your switch over temp (reducer) is way too low, o.k for now but you'll pick up some problems when colder.
Maine is 35.(have the same engine with LpgTech316)
Gas temp. sensor for REG is 4k7...... I think... Check on cold engine, temp. should be around outside temp.

[ZiggyB]

Your slider has disappeared as you are in Standard not Tech calibration parameters.
The reason for the ignition loss error is because the car stalled while on gas so no wiring fault or whatever. This will always happen with LPGTech and you just have to clear the errors/log when you next have a look at the software.
Your other issue with starting on gas is you have Fast Start enabled so ass soon as it sees a RPM signal the car tries to start on LPG.

[PAWEABMW]

Hi guys thx for the replies changed the setting from fast start in the control panel still trying to start on gas tho,if i dont switch it manually back to petrol before i stop the engine it always tries to restart on gas.Takes about 15 turns tho to start,also i noticed i'm getting the odd cel and error system bank 1 too lean every now and again.Any ideas guys ?

[hardcorepit80]

Please post screen from "settings" tab and "maps".

[PAWEABMW]

Hi guys been testing for a week now still a few problems,drives great on gas at all revs with these problems
1. still kicks up the cel light now and again when on gas.......error code... bank 1 system too lean(i have already tried enriching the gas mixture via the program slider now at 1.12

2.always tries to start on gas,i turned fast start off cant see any other settings,only way round it is to manually push the gas switchover button to turn the gas off before turning the engine off,otherwise take about 20 turns to start again

3.my lambda readouts look odd stuck at basically zero 0.00-0.03 max at any rev range i have connected the violet wire to the black signal wire and the violet / black to the second lambdas black signal wire,no luck still the same even if swapped round,no errors on petrol so i assume the lambdas are working ok

other than that the car runs fab on gas no stalling or hesitation thruout the rev range any help guys would be great i would like to have this working 100% or at least know what the problem is.......here are a few screen shots