LPG Discussion Forum

Hello,

For a few weeks I've had a problem where when my car (1997 328i, multipoint system, single hole tank) sometimes won't change over properly from cold. It gets up to temp, tries to switch, hesitates then changes back to petrol (with beeping and flashing). I would say it does this one out of ...

[quote="classicswede"]

No vapour filter?
6 injectors in line rather they a Y connection

[quote]

I spoke with Mint yesterday - they said they don't fit vapour filters to these because the injectors are servicable and they have traced problems to the filters in the past (on other cars).

Regarding ...

The manifold pressure is lowest when the throttle is closed, highest when it is fully open.
yes but, also means vacuum is highest when throttle is closed etc, have to be careful about what you are measuring

The regulator should keep the gas pressure the same relative to the manifold pressure ...

Before proceeding: Does the car have (very) similar power on LPG as on petrol at full load? (the lamda's are not connected so we don't know if mixture is correct). At full load you have 14.53ms of petrol injection time. If the car pulls similarly at full load on petrol or LPG, then the mixture, and ...

Another thing I have noticed in that screenshot.

The gas pressure is set as 0.95 bar in the software but the actual gas pressure is actualy running at 1.15 bar under full load

The software should probably be set to 1.20 bar, not critical but you do want it right if you can.

I hadn't spotted ...

There is nothing stricking there for causing the problem but with a little inside knoledge I would say the cause of the problem is the reducer.

That COPY that is fitted has been the cause of similar running problems on other cars. I think even one or two have posted up on here.

I would ask them ...

Honestly im struggling to believe that Edward is prepared to put his name to that. Because i certainly wouldn't let that out the door.
I think its probably fair to assume that the injector spud positions are incorrect. Just judging by the rest of the install.
However that doesn't solve the OP's ...

Ive used straws to eliminate any problems with erratic idle, stalling at junctions, lag between idle and out of idle etc. I have also managed to get all the covers back on and put the ecu in the ecu box. But guess what ? It took me 4 days, i changed the crankcase ventilation valve whilst i had the ...

Simon, I've tried to answer your questions & comments below, this is the first time I have been able to access http://www.lpgforum.co.uk (not sure why) since last Monday, thanks:

Recently fixed some obvious mistakes on several vehicles from a certain installer mentioned in the thread (not from ...

Cheap job there Tubbs.

Looking at the OP's pics the install is a mess

ECU not secured
No vapour filter?
6 injectors in line rather they a Y connection
LPG pipes rubbing on inlet manifold
and where did the engine cover go?

A very rough looking job did they actualy map the system of just do an ...

Simon, thanks for your reply, I'll need to wait till I'm on a laptop tonight to reply properly...

Tbh i think its a bit off to slate an entire breed of LPG ecu's just because yours doesnt work properly. Which is far more likely down to injector placement or something, you could so easily be barking up an entirely different tree altogether.
Pics under bonnet please. Ive done many a bmw in my ...

I'm doing this on my mobile, so hope it comes out OK...

pictures:

1
http://i1326.photobucket.com/albums/u648/rossjpsalmon/20130116_104151.jpg

2
http://i1326.photobucket.com/albums/u648/rossjpsalmon/20130116_104246.jpg

3
http://i1326.photobucket.com/albums/u648/rossjpsalmon/20130123_132259 ...

The "rpm signal" box is unchecked, which I guess means that they didn't connect up the rpm wire and the ECU is using the injector signal for rpm. It could be erratic because of the extra "micro-injections" my car ECU is doing to try to manage the steady-state (i.e. idling and cruising) mixture ...

Misfiring on static idle, correct.

I did that, they were at around 2.5 - 2.6 ms on petrol, I changed the trim in that area (the 4 'boxes' the dot was floating between) such that the the "petrol ms" went to 2.5 - 2.6 ms on idle, but it still misfired about the same. I tried in the diagnosis window ...

I'll get some photos of that.

The "ms" I said about are milliseconds, from the map, like the one on the thread I linked to. 2.0 and 2.5 are the lowest on mine (not 1.0 and 1.25 like the guy has on there).

Ross

Bear in mind plugs will look white when running on gas, regardless of mixture so cannot be relied upon as an indication.


I never knew this... I did take pictures - what's the easiest way to post pictures on here, get a photobucket accound and link to them, or is there a simpler way?

I will post ...

Actually, I had assumed the King software would work on my LPG ECU... My LPG ECU is an AEB 2568, which looks the same as the King ECU described (and a Romano one too), also the software looks exactly the same. I was wrong though. The King software can't connect to the ECU. The AEB program doesn't ...

Hi,

I got my 97 328i coverted by Mint LPG (Near Newport). It's an AEB2568 ECU with Ultragas Powermax vapouriser and injectors. When I got it back it had idle problems (misfiring of idle and stalling when you dip the clutch coming up to junctions, no problems on petrol), so I read the car ECU codes ...

Hi,

I think I'm having the same problem with my 97 328i, so I want to try this solution.

However, having installed the King software (linked to by markocosic), when I go to upload the ck8 file, ck8 it is not one of the extensions listed for either 4-cylinder or 5-6-8-cylinder...

Am I doing this ...