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[tigers_gonads]

At last, i've got the shed running on gas 

Set up the software as per the instructions I think 
Did the map on petrol then tried the same route of lpg.

The car runs ok ish when cruiseing but when its put under any load, I get the ecu light on the dash flashing and the engine is reluctant to pull.

Took it for a blat down a duel carrageway today.
Entered it on a light throttle and let the speed creep up to 60 ish.  No problem.

Dropped it down a cog and floored it.
The eml lamp gave a few flashes
I kept my foot in to see what would happen 
Got to about 70 ish and the power backed right off and the lpg buzzer started to bleep like crazy.
Next thing I know, the car cuts back to petrol.  ( noted that according to the mid, the instant mpg was well down on what it should have been for the next few miles )

The petrol / lpg map I did seamed to be pretty good ( petrol and gas traces quite close together )

I did notice that the MAP presure was between 0.8 and 0.85 for most of the map   :-/
The instructions stated around 0.3  :-/

I have just done a paperclip test and the following codes where stored

38  02 sensor 1 volts low
74 Maf volts high
98 02 sensor 2 volts low

I'm pretty confident that these codes are new ( car runs great on petrol )

The car has had its secondary air bits blanked of and removed by Daz 12 months ago.  The car runs great on petrol and even though the idle compsumption is 0.3  :-/

I have kept a record of the setup figures if needed.

Any idea's ? or is it back to the box of matches again 

[JamesV6CDX]

You definitely got the pressure sensor connected right, pipework wise?

Sounds like the pressure is dropping off. what size are your injector nozzles?

[tigers_gonads]

You definitely got the pressure sensor connected right, pipework wise?

Sounds like the pressure is dropping off. what size are your injector nozzles?

Pressure sensor is plumbed .............. reducer ......... sensor ............ plenum.

Injectors are drilled out to 2.3 mm

[sassanach]

nozzles shoud be more like 3.0mm

[tigers_gonads]

nozzles shoud be more like 3.0mm

The gas nozzles ( that screw into the manifold ) are as they came in the kit 
The 6 injector nozzles was drilled out with a 2.3mm drill bit 

[sassanach]

if this is for a 3 litre then 2.3 is not big enough.

[Kevin Wood]

If it's switching back to petrol the vapour pressure is dropping too low. Is the vapouriser hot enough? (look at the reducer temperature in the LPG software)

What pressure is the vapouriser set to, and what is the threshold for switchover to petrol?

I agree that 2.3mm sounds too small, but I think the vapour pressure needs sorting first since it can't currently supply enough vapour.

[Lazydocker]

if this is for a 3 litre then 2.3 is not big enough.

2.3mm is plenty big enough with the new reducer/injectors running a vap pressure of around 1.1 BAR Adjust the vap pressure with the little brass Allen key in the middle

Got my 3.2 (and at least one other) running perfectly on that setup

[feeutfo]

Latest software will complain if the nozzles are too big with the dual feed vapourisor. Mine/ours are the recommended 2.5, but it looks like 2.3 is the way forward.

0.8 bar mentioned is too low as LD says. Get it warm, switch to gas and set the pressure to 1.1 bar as described. Then re calibrate and re map. Ignore the reading on petrol.

Assuming vap temp is warm enough. Iirc the vap needed re pluming on another thread.

[tigers_gonads]

Right the internet round here is sh*t so i'll try and answer some questions while its on 

Chris .............. the reducer was re plumbed when I sorted out the leaking waterpipe.
It now gets hot within a mile or so.

Kevin .............. the threshold for switchover to petrol is set at 6000 rpm
In the temperature box, both readings was about the same plus / minus 5 degrees

LD .............. Presure readings.   As you look at the AC Gas Synchro gas controller settings page.
Top right hand corner box titled Presure ( BAR )

GAS  1.1 bar approx
MAP  0.8 bar approx

Hope this lot helps

Any advise welcome and i'll get back to you if the t'internet is bloody working 

cheers  steve

[Lazydocker]

I'll have a look later to see if I've got a saved settings file of one of the new kits and post a screen shot/email it to you.

[tigers_gonads]

I'll have a look later to see if I've got a saved settings file of one of the new kits and post a screen shot/email it to you.

That would be great 
The lpg controller cut the gas off tonight ( empty ) so I just put 25 quids worth of gas in.
100 miles worth on petrol, i'll see what I get on gas  :-/
May try a new map tomorrow and see how it behaves.
Need to get it sorted asap because im going down to the caravan on wednesday for 5 days.

[tigers_gonads]

I've just crashed the gas ecu back to default and re done the map.

The car now idles better and seems to drive a little better.
The petrol and gas traces are now within 2 or 3 mm from each other.

But ............. during a slight uphill run ( car doing 50 ish / 4th gear / gas / accelerating with the throttle wide open ) the eml light is comeing on ( same codes as last time ) and the power is backing off 

Am I looking at opening the gas injectors out or can this be sorted by adjusting the opening duration of the injectors  :-/

During initial setup, I recieved 2 warnings.

Map presure too high
Injector nozzles are too big

Must admit, i'm cr*p at all this lark so any pointers apprieciated

[Kevin Wood]

MAP  0.8 bar approx

This concerns me. Is this the reading you get with the engine idling? Should be more like 0.3-0.35 IME.

Worth checking out the vacuum feed to the pressure sensor and vapouriser?

[tigers_gonads]

MAP  0.8 bar approx

This concerns me. Is this the reading you get with the engine idling? Should be more like 0.3-0.35 IME.

Worth checking out the vacuum feed to the pressure sensor and vapouriser?

Me also  :-/

Map reading at idle and pretty constant through the rev range

Am I looking for a leak / bad conection ?
If it was a leaking pipe, wouldn't it be too low ?

Dodgy pressure / temp sensor supplied with the kit ?

If the reading is right, what would cause it to be so high ?

Am I going to be baned for being a pain in the arse ?