fly sf brc lpg kit advice on diagnostics needed

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ln69bt
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fly sf brc lpg kit advice on diagnostics needed

#1 Post by ln69bt » Mon Dec 31, 2018 4:45 pm

Hello I have bought a second hand lpg kit for my l322 range rover off the same car couple of bits I need help with 1 is which lead do I need to connect the laptop to it I have one with a white connector and a black 4 pin connector that I used for my old king system but this kit has a 3 pin connector can it be changed to work ?

The kit is a fly sf 8 cylinder kit it's also missing the switch so need advice on buying the correct one it as a separate buzzer I have that part pics below
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Brian_H
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Re: fly sf brc lpg kit advice on diagnostics needed

#2 Post by Brian_H » Mon Dec 31, 2018 7:35 pm

Your best bet would be to give Tinley tech a call, they should be able to find the bits you need.

Lead wise if you have one of the multiple end leads you may be able to get different plugs for it from whoever supplied the lead, or butchering the original lead to fit your brc system is an option, but not a good option generally.

ln69bt
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Re: fly sf brc lpg kit advice on diagnostics needed

#3 Post by ln69bt » Mon Dec 31, 2018 10:06 pm

Thank you I see my lead does have 3 wires same as the fly plug just need to find out the way they need to go iv orderd switch ect off tinley tonight if Anyone has any advice on making my lead work please let me know

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Re: fly sf brc lpg kit advice on diagnostics needed

#4 Post by LPGC » Tue Jan 01, 2019 8:09 pm

I'd advise buying the proper BRC cable, you can't mod most generic cables to work well with BRC, even supposed BRC compatible off the shelf cables don't work with all BRC systems.
TT can supply BRC bits and tell you what BRC bits (switch etc) are needed for which BRC systems etc but it's only relatively recently that they took over supply of BRC and you don't become expert in a range as wide as BRC overnight.
Your BRC system does use a runtime map sensor - If it was a BRC system that didn't use a runtime map sensor (just a calibration time map sensor) and you reset the map you'd need to buy a BRC calibration time map sensor besides the interface cable to calibrate from scratch.. But even though your system does have a runtime map sensor I wouldn't advise resetting the map.. If the map was OK on the last same model vehicle it came from it should be quite close for your vehicle so instead of resetting the map just make adjustments to it's existing map.
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ln69bt
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Re: fly sf brc lpg kit advice on diagnostics needed

#5 Post by ln69bt » Fri Jan 04, 2019 8:30 pm

Thank you for the info I orderd all bits off tt and cable is coming Monday iv got it all fitted and it's running on lpg but not correct

Tick over once switched over smooth most running is also nice and quick but only upto 80 percent throttle anymore it judders about lacking power like fuel starvation also when put back to petrol it runs bad obviously it's adjusting the fuel trims what's the most likely cause of this full throttle problem.

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Re: fly sf brc lpg kit advice on diagnostics needed

#6 Post by Gilbertd » Fri Jan 04, 2019 10:16 pm

What do the lambda sensors show when it runs rough?
'96 Saab 900XS, AEB Leo, sold
'93 Range Rover 4.2 LSE, Lovato LovEco, sold
'98 Ex-Police Range Rover 4.0, Singlepoint AEB Leo, my daily motor
'97 Range Rover 4.0SE, eGas multipoint, a project.....

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ln69bt
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Re: fly sf brc lpg kit advice on diagnostics needed

#7 Post by ln69bt » Sat Jan 05, 2019 7:57 pm

Switch over it's ruff for 3 seconds then ticks over and ticks over perfectly revs perfectly upto about 80 90 percent throttle at that point feels like you have turned the fuel off let off slightly pulls very well got engine fault codes both banks running rich fuel trim at - 25 what do I need to look at on lamba just see voltages?

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Re: fly sf brc lpg kit advice on diagnostics needed

#8 Post by ln69bt » Sun Jan 06, 2019 10:16 am

I fitted the kit taken from same car drilled my own manifold copying the other but from looking iv got my vaccum from the oppersite side of cylinder 1s manifold bank if that makes sense it says on a video i watched that's wrong ?

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Re: fly sf brc lpg kit advice on diagnostics needed

#9 Post by LPGC » Mon Jan 07, 2019 7:10 pm

ln69bt wrote:
Sun Jan 06, 2019 10:16 am
Hello you commented on my post and I'm looking for a bit of advice if you have a few mins free.

My car on lpg at over 80 percent throttle looses all power like fuels turned off let off the throttle slightly and it pulls well. I think iv put the vaccum take off on cylinder 1 opersite side to injector I now see this is wrong but would it cause the problem I'm having fuel trims go to-25 and get 2 fault codes both banks rich running.

Thanks for looking
The vac pipe shouldn''t really be to a port runner at all (especially not low down near a port), on the BMW M62 engine you can fit the vac nozzle to the top of the short square bit at the front of the manifold that the throttle body bolts to... But as long as you're getting vacuum on the vac pipe this won't be your problem and is unlikely to have any ill effect besides perhaps shortening reducer lifetime.

The M62 engine runs open loop at high load, open loop means fuel trims won't be applied so I assume the fuel trim issue is at part load... Is it rich under all driving conditions or just at low or moderately high loads? Location of manifold connection slight issue aside, assuming you connected both the system's vacuum sensor and reducer to manifold vacuum It could be just a tuning issue - in which case it could be going so rich at high load that it misfires, or so lean that power falls away drastically. If lean at high loads (and without knowing what injectors and pressure you have) it could also be due to combination of pressure and injectors.

There is something else, on one of your other posts above you implied that the engine 'falters' (my wording) a bit during changeover before resuming smooth operation. This could be a tuning issue but could also point to you having some of the routing incorrect (gas injector output channel per cylinder matching petrol injector channel). Symptoms of routing issues are usually most notable at low rpm but can sometimes cause symptoms at high rpm high loads.

Simon
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ln69bt
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Re: fly sf brc lpg kit advice on diagnostics needed

#10 Post by ln69bt » Mon Jan 07, 2019 7:51 pm

Thanks for the info I will move the vac take off to where you said iv copyed a converted manifold and kept all pipes same length as it was fitting to the old car

Yes it's lumpy when switches over and fuel trims stay at -25 even at tick over

Iv got my lead and finally got some software working today I ran a self map and now it's running on petrol even when it says it's on gas I'm really confused can anyone advise what's going on
Last edited by ln69bt on Mon Jan 07, 2019 8:27 pm, edited 1 time in total.

ln69bt
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Re: fly sf brc lpg kit advice on diagnostics needed

#11 Post by ln69bt » Mon Jan 07, 2019 8:26 pm

If I can screen shot any info on it running to help let me know

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Re: fly sf brc lpg kit advice on diagnostics needed

#12 Post by ln69bt » Mon Jan 07, 2019 10:29 pm

With wiring should the purple or the orange wires go to the petrol ecu

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Re: fly sf brc lpg kit advice on diagnostics needed

#13 Post by ln69bt » Mon Jan 07, 2019 11:58 pm

ln69bt wrote:
Mon Jan 07, 2019 10:29 pm
With wiring should the purple or the orange wires go to the petrol ecu
Worked it out purple to cars ecu that's how mines connected

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Re: fly sf brc lpg kit advice on diagnostics needed

#14 Post by ln69bt » Tue Jan 08, 2019 9:16 pm

I swapped the orange and purple wires around and it's now it's running very well just on lpg and it calibrated the tick over ect the 3 seconds it switches over it's slightly ruff but then goes perfect when switched long term fuel trim is at 3 when on lpg now insted of -25

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