Cleaning BRC injectors?

Post Reply
Message
Author
jay_1
New member
Posts: 2
Joined: Fri Oct 19, 2012 9:14 am

Cleaning BRC injectors?

#1 Post by jay_1 » Tue Sep 25, 2018 5:39 pm

Hello all,

I have a BRC sequential system fitted on a lincoln navigator.

I have started to have problems with the system and am after some help.

It got to the point where the car refused to run on gas and the car was taken to an lpg centre. The car had 8 new spark plugs and 8 new coil packs in a bid to see if that would help with the running issue but it didnt.

The garage first carried out a service on the car and said that there was a lot of 'dirt' on the filters and the car will now run but has a missfire on gas and needs a new vapouriser as it is over pressured.

I paid for that and the car still didn't run right and was told it was most likely the injectors and that the car needs a tune up at the cost of...... so i left.

My question is, can the injectors be cleaned to see if this will help? I have seen a company selling ic12 supposedly with good results and wondered if anyone had any luck?

thanks
jay

LPGC
Installer
Posts: 3225
Joined: Wed Sep 29, 2010 6:01 pm
Location: Yorkshire
Contact:

Re: Cleaning BRC injectors?

#2 Post by LPGC » Tue Sep 25, 2018 7:48 pm

Seems you've been done over by the garage to me! Was this an LPG garage or a normal garage?

You could try cleaning injectors, others have had luck with cleaning fluids, I've never had any luck with cleaning fluids.

Find out what cylinder the misfire on gas is on, then swap pipes between manifold and gas injectors between the misfiring cylinder and the cylinder next to it, also swap the electrical connectors on those too injectors. Does the misfire follow the gas injector?

Does your BRC system on your Lincoln feature a BRC lube system of the type that feeds lube into the piping between reducer and injectors?
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240

jay_1
New member
Posts: 2
Joined: Fri Oct 19, 2012 9:14 am

Re: Cleaning BRC injectors?

#3 Post by jay_1 » Wed Sep 26, 2018 11:53 am

It was an lpg 'specialist' that were recommended to me...I have since read a post on here suggesting they may not be the best place. They are based in London and I just didn't get the right vibe from them at the time but I was desperate.

I've just remembered that the problem started after I ran out of gas and the car then refused to run on gas after it was filled up again.

Also, the tech showed me on his laptop that if he turned off one of the injectors and made that cylinder run on petrol, the misfire went away....Was he bluffing me and has just turned the injector off? Sorry if that sounds daft but I'm not sure how the system works!

No lube system on my brc - or if there is I haven't noticed it and certainly haven't filled it up!

The car is parked up on a relatives drive in clacton so I can't poke about at it just yet but wanted to arm myself with things to try when I'm next there as I want to get the car back on the road!

I will grab some injector cleaner if you think it won't do any harm?

Wondering if it's worth getting some software to connect to the lpg system to help diagnose?

Thank you for your help so far!

Brian_H
Intermediate Member
Posts: 1085
Joined: Mon Jan 23, 2012 12:21 pm
Location: Milton Keynes

Re: Cleaning BRC injectors?

#4 Post by Brian_H » Wed Sep 26, 2018 5:59 pm

If you can find the software and lead to connect to the LPG system it would help, Though I think you will find thats more difficult with BRC than most other makes out there (except for Prins).

If he turned the injector off and it ran better that should have switched that cylinder to petrol. Note though it may indicate another issue on that cylinder (petrol injector leaking being one possible cause so don't rule that out!) Equally it could indicate an ignition problem on that cylinder as they are usually more noticable on LPG than petrol (you've swapped the plug and coil pack, but its worth inspecting the wiring to that cylinders coil pack at the same time, especially if its the same one the lpg system is taking an RPM feed from if its wired up to do so).

Would be a good idea to have a look and see if you can identify the exact system thats fitted - The ECU should help with this, failing all else take some photos while your there of the bits you can find and that might be enough to identify it.

It may be the case that you didn't really run out of gas, but it detected a fault in one of the lpg injectors and has switched back as a result of doing so by the way you describe it (Simon would be able to confirm but it may be the case that its detecting an error and won't switch if the part in question has failed completely?)

LPGC
Installer
Posts: 3225
Joined: Wed Sep 29, 2010 6:01 pm
Location: Yorkshire
Contact:

Re: Cleaning BRC injectors?

#5 Post by LPGC » Wed Sep 26, 2018 8:09 pm

There are around 8 different BRC ECU's and most use a particular version of BRC software. But if you want to go the software route to diagnosing it is viable to DIY but in that case would recommend you buy the BRC branded interface cable, I could help point you to correct software and BRC isn't anything like the 'closed shop' it once was now that TinleyTech are the UK supplier.

Yes switching a single cylinder back to petrol is a very handy way of determining faults on individual cylinders. As is what I wrote above.. Quoting myself here "Find out what cylinder the misfire on gas is on, then swap pipes between manifold and gas injectors between the misfiring cylinder and the cylinder next to it, also swap the electrical connectors on those too injectors. Does the misfire follow the gas injector?"

As Bri said you might not have run out of gas, the BRC ECU may have detected an electrical problem (which might be open circuited LPG injector coil or lack of pulsing petrol injector signal for one cylinder - which would likely turn out to be on the same cylinder you have the misfire on. Depends on which BRC ECU you have because they don't all feature that kind of on board diagnostics.

I wouldn't read much into maybe not running out of gas at this point, instead would do what i said (quoted myself bit) above and if the misfire then moves to the cylinder you swapped from the current misfiring cylinder you might want to try swapping the injector on the cylinder with the misfire.

Mind you, I have fixed very similar problems on BRC installs just by unplugging the BRC ECU from it's big connector and cleaning tarnished / corroded contacts!
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240

LPGC
Installer
Posts: 3225
Joined: Wed Sep 29, 2010 6:01 pm
Location: Yorkshire
Contact:

Re: Cleaning BRC injectors?

#6 Post by LPGC » Sat Oct 06, 2018 11:12 am

I diagnosed a duff injector on an L322 Rangerover fitted with BRC system yesterday, this injector is stuck open.
Before coming to see me the owner had been advised to change coil packs, plugs and lambda probes, all of which he'd done but all ineffective and unnecessary.
I didn't have the exact screw thread type orange spec BRC injector in stock having recently fitted the same spec on another car so I just showed the customer how to disassemble/assemble the BRC injector rail to fit a new injector, verified that the other 7 BRC injectors were OK (by making the engine run on 7 cylinders on LPG and 1 cylinder on petrol), and pointed him to TinleyTech so he could buy and fit the new injector himself. Of course a lot of customer wouldn't want to fit an injector themselves, in which case we'd have had the new injector delivered to me and I'd have fitted it for him, but this customer is more than capable and willing to buy/fit his own injector with my guidance.
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240

Post Reply