PROBLEM LPG SYSTEM

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gregray
Posts: 2
Joined: Tue Jun 07, 2011 12:54 pm
LPG System: Lovato
Car: CARINA E

PROBLEM LPG SYSTEM

Post by gregray » Wed Jun 08, 2011 1:52 pm

Hi
I have a problem with my car, whereby it gives the following fault from the code reader “Catalyst system efficiency below threshold (bank 1)”.

I have been able to obtain the following values from the sensors etc after the codes were removed:

Absolute throttle position 15.1%

Ignition timing 10º advance

Short term fuel trim bank 1 2.34% lean

Long term fuel trim bank 1 10.94% rich

Intake air temperature 35ºc

Bank 1 sensor 2 0.720 V



Before the codes were removed, the values at the point of the DTC occurring were:

Absolute throttle position 15.1%

Ignition timing 10º advance

Short term fuel trim bank 1 3.91% rich

Long term fuel trim bank 1 8.59% rich

Engine speed 1808.50 Rpm

Vehicle speed 25 Mpg

Intake air temperature 31ºc



I look forward to any feedback. I have posted this onto the site honestjohn, (http://www.honestjoh...dex.htm?t=86617) but nobody could respond.


Thanks

Greg

mak-uk
Posts: 288
Joined: Mon Sep 03, 2007 8:48 pm
LPG System: Prins VSI
Car: BMW 540iA Sport
Location: All over the UK

Re: PROBLEM LPG SYSTEM

Post by mak-uk » Wed Jun 08, 2011 6:28 pm

Hi Greg,

What car is it?

That particular trouble code, as the name suggests, is usually to identify faults with the cat(s). However, the best way to test it all out if you use LPG is to clear all the error codes and then run on petrol for a while and see if the errors occur - this is to determine if the LPG system is contributing to the errors or if it's a 'genuine' error with the petrol system which will obviously manifest with the LPG system too.

Mak
Mak
Site Owner
2001 BMW 540i Auto Sport Saloon
~300 BHP; ~320 ft/lbs, Prins VSI system

gregray
Posts: 2
Joined: Tue Jun 07, 2011 12:54 pm
LPG System: Lovato
Car: CARINA E

Re: PROBLEM LPG SYSTEM

Post by gregray » Wed Jun 08, 2011 8:55 pm

The system is made up of the following units:
The control unit is a BRC Sas equipment (2 ent, sequ 4) is stated on the controller. It is a sequential setup.
The vapouriser is a Genius 6AG 11200 mbar with serial 8055 on it.

I hope this of use.
Greg

tubbs
Posts: 24
Joined: Tue May 17, 2011 10:42 am
LPG System: singlepoint
Car: v6 3.5 shogun

Re: PROBLEM LPG SYSTEM

Post by tubbs » Sat Jun 25, 2011 9:47 pm

Greg, what year is the car ? You have a problem with the fuel trims being too far out on petrol when it's on gas.

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