LPG Forum


All times are UTC



Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Sun Jan 26, 2014 10:23 pm 
New member

Joined: Thu Jan 23, 2014 11:25 am
Posts: 2
Location: Worcestershire
Hi can anyone help me please?
I have a 1999 lexus ls400 fitted with OMVL dream 21 piro gas system. No recent lpg service history and the car has only just come to me with no prior knowledge.
Car starts and runs fine on petrol and switches onto gas after a mile or so.
Shortly afterwards it switches back to petrol and will only run on gas if I force it (hold switch for a couple of seconds). Even then as soon as I give it any reasonable amount of throttle it switches back to petrol again, and I have to force it back to gas. On the motorway with cruise control set to 70 ish mph and on the flat road the gas will stay on but hit a incline it switches back to petrol. Am I right in thinking the filters are the best place to start? A solenoid issue maybe? Also, if I do change the filters myself do I need to shut the lpg off manually or is it shut off whilst the engine is turned off? I dont want to have gas leaking everywhere. Please excuse my ignorance if I sound a bit of a numpty, I havent dealt with lpg before.
Also there are no beeps or sounds coming from the system.
The system was fitted in 2007 at 108k miles. The car has just turned 144k miles.

_________________
Simon.


Top
 Profile  
Reply with quote  
PostPosted: Sun Jan 26, 2014 11:20 pm 
Installer

Joined: Fri Oct 21, 2005 7:56 pm
Posts: 2581
Location: North Wales
Most likely a faulty pressure sensor. The Piro sensor was plagued with problems and most were changed to the AEB 025 one. If your sensor does not say AEB 025 then that is the first thing I would try without software.

_________________
http://www.classicswede.com/
http://www.classicswede.co.uk/LPG/cat17 ... 10800.aspx

LPG installer Anglesey North Wales

DIY LPG Kits

07824887160


Top
 Profile  
Reply with quote  
PostPosted: Mon Jan 27, 2014 12:19 am 
New member

Joined: Thu Jan 23, 2014 11:25 am
Posts: 2
Location: Worcestershire
Thanks for the swift reply.

Can you give me an idea of where the pressure sensor is located please and if I do indeed need a replacement part is this the one I need.....
http://lpg-tech.co.uk/product.php?id_product=101
Thanks again.

_________________
Simon.


Top
 Profile  
Reply with quote  
PostPosted: Mon Jan 27, 2014 1:16 am 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 3018
Location: Yorkshire
Hmm I converted quite a few LS400's with Piros around 2007....

Question for Dai, this just reminded me, I've got a dead 8cyl Piro ECU and loom etc, not had a look inside it yet, any common failures inside the ECU?

Simon
Lpgc

_________________
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


Top
 Profile  
Reply with quote  
PostPosted: Mon Jan 27, 2014 9:20 am 
Installer

Joined: Fri Oct 21, 2005 7:56 pm
Posts: 2581
Location: North Wales
shayabusa34 wrote:
Thanks for the swift reply.

Can you give me an idea of where the pressure sensor is located please and if I do indeed need a replacement part is this the one I need.....
http://lpg-tech.co.uk/product.php?id_product=101
Thanks again.


Trace the pressure pipe off the end of one of the injector rails to or you can trace the vacuum pipe from the vapouriser to it. The installer could have positioned it anywhere.

_________________
http://www.classicswede.com/
http://www.classicswede.co.uk/LPG/cat17 ... 10800.aspx

LPG installer Anglesey North Wales

DIY LPG Kits

07824887160


Top
 Profile  
Reply with quote  
PostPosted: Mon Jan 27, 2014 9:23 am 
Installer

Joined: Fri Oct 21, 2005 7:56 pm
Posts: 2581
Location: North Wales
LPGC wrote:
Hmm I converted quite a few LS400's with Piros around 2007....

Question for Dai, this just reminded me, I've got a dead 8cyl Piro ECU and loom etc, not had a look inside it yet, any common failures inside the ECU?

Simon
Lpgc


What kind of dead is it? There were a number of failure issues with Piro ECU's

_________________
http://www.classicswede.com/
http://www.classicswede.co.uk/LPG/cat17 ... 10800.aspx

LPG installer Anglesey North Wales

DIY LPG Kits

07824887160


Top
 Profile  
Reply with quote  
PostPosted: Mon Jan 27, 2014 4:06 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 3018
Location: Yorkshire
classicswede wrote:
What kind of dead is it? There were a number of failure issues with Piro ECU's


Simply as though the fuse has been removed, no lights on switch, ECU draws no power, completely dead.

It was one I fitted on a customer's American pickup when Piros first came out. The customer ran it for a year then left it stood outside at a farm for over a year without a battery fitted. I wondered if they suffered from damp ingress or had some sort of internal battery backup or something? I know the usual AEB boards but not the Piros.

Simon
Lpgc

_________________
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


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group