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33661

General Discussion Area / Re: LPG installation WIP

« on: 17 November 2007, 23:31:56 »

Does sound to me like there could be an airlock somewhere.

Might be worth running a garden hose through the vapouriser section of coolant plumbing just to make sure it's flowing freely. That might blast a bit of air out too.

Kevin

33662

General Discussion Area / Re: LPG installation WIP

« on: 17 November 2007, 23:12:40 »

That's odd. If I'm right you've got it in series with the heater+hbv so if there was no coolant flow the heater wouldn't work :-/

How hot are the coolant pipes to the vaporiser geting? Should be too hot to hold I guess- like the top rad. pipe.

Could it be that the vapouriser is full of air and a little coolant tricking through the bottom? I've never seen one, so not sure if they have a coolant jacket around them or just a straight-through pipe. I'd suggest unbolting it and inverting it while the engine is running just to clear any air, but with the solid fuel line connected that's not so easy I guess.

Just thinking about a post you made after mounting the vapouriser that it altered the running temperature. Does make me wonder if circulation around that branch of the cooling system is not good. (temp. sensor is on the bridge so maybe related?)

I think you're tantalisingly close...


Kevin

33663

General Discussion Area / Re: LPG installation WIP

« on: 17 November 2007, 22:54:52 »

i have tried to do an auto calibration, cant get the vapouriser hot enough, the auto calibration wont kick in until the unit hits 40 degrees, the best i can get is about 32 degrees, despite the temp guage reading 90 and the fans running.

That doesn't sound right, and if the vapouriser was stone cold maybe that explains why it's starving it of fuel. Are you sure there's coolant flow through it? With it having warmed up on petrol (vaopouriser is doing no work thus extracting no heat from coolant) I'd expect it to sit pretty much at coolant temperature.

Kevin

33664

General Discussion Area / Re: LPG installation WIP

« on: 17 November 2007, 22:31:51 »

Hmm.

The vapour pressure is referenced to inlet manifold pressure as there is a vacuum connection to the reducer so depending on whether the reading you are looking at is absolute or relative to the manifold vacuum it might be normal for it to drop with the engine running. :-/

 Worth trying to bump up the fuelling in the map a little to see if it sorts itself out? Or try doing an auto calibration of the LPG system?

Kevin

33665

General Discussion Area / Re: LPG installation WIP

« on: 17 November 2007, 22:20:20 »

does the LPG system need purging?

Don't know. Just wondered if you're only getting vapour at the evaporator and that's why it can't cope with the fuel demand of the engine. Sounds like it's going lean as soon as you switch over, which concurs with the drop in vapur pressure I guess.  :-/

Is there a manual valve on the tank as well? Is that fully on?

Kevin

33666

General Discussion Area / Re: LPG installation WIP

« on: 17 November 2007, 21:35:02 »

however as soon as we started to run it on gas the pressure dropped again to .8 bar, it coughed spluttered and will not idle, when revved it will run badly and will not pull.
the OBD allows me to knock off sets of injectors, as soon as we knock off 2 or 3 the pressure rises again to .95 bar and it will idle a bit better but still not smoothly.

I wonder if your fuel supply line hasn't been fully purged of air yet?

I guess it won't work until you've got liquid right up to the evaporator.

Is the LPG ECU showing sensible values for the manifold pressure (0.4 bar absolute when idling I'd guess), engine RPM and petrol injector duration on all injectors (another guess - about 3 ms when idling)? Can you see the Lambda sensor signals and are they going rich or lean when on LPG?

Kevin

33667

General Discussion Area / Re: LPG installation WIP

« on: 10 November 2007, 00:32:52 »

Don't suppose there's room for the ECU under the scuttle in the power sounder type area? Have a feeling I saw some space there. It's pretty tight everywhere else in that engine bay.

How long is the loom provided with it? Will it reach into the cabin?

it does look fairly weatherproof. :-/

Kevin

33668

General Discussion Area / Re: LPG installation WIP

« on: 10 November 2007, 00:19:49 »

I've been wondering where and how to mount those :-/

Drilling and tapping the side of the plenum is the best I can think of. That will only work on a 2.6 / 3.2 due to lack of IACV and EGR.

Any ideas?

Do you think this is a good kit? I can afford one now (Can also afford better, EG Romano)... but this one is looking OK..

I've been reading the book on the ECU and it looks pretty good. Does everything I'd want it to, I think. But then I'm new to all this.

Kevin

33669

General Discussion Area / Re: LPG installation WIP

« on: 08 November 2007, 19:13:23 »

PM Sent. Martin posted the rules a while ago and, whilst I can't find the post now, I've got it all in a text file so anyone interested - PM me your email address and I'll get a copy off to you.

Kevin

33670

General Discussion Area / Re: LPG installation WIP

« on: 02 November 2007, 10:18:54 »

I believe the kit is one of these:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330170356040

For the really keen here is the manual:

http://www.ac.com.pl/autogaz/programy/pliki/Instruction%20of%20Stag-200,%20Stag-300%20controller.pdf

I will start another thread for expressions of interest in a bulk buy &/OR LPG party.

Kevin

33671

General Discussion Area / Re: LPG installation WIP

« on: 01 November 2007, 23:28:56 »

OK. Had a chat with Jeremy today and can echo the observations that he is a helpful chap. Talked about the possibility of a bulk buy and he said he normally does a 5% discount for the 2nd kit but if we can get more firmed up he'd see what he could do. Sounds better than nothing.

Made the mistake of opening my bonnet this evening to work out where everything will go

Shut it again quick!  

They're not far away from me so if we do go ahead I'm happy to pick the kits up and distribute or we could have a fitting party and get them all together that way. May be worth tacking one or two installs to figure everything out and then have a LPG party for those who are interested where we can gather everything we need in one place and crack on with a few?

Kevin

33672

General Discussion Area / Re: LPG installation WIP

« on: 31 October 2007, 23:11:11 »

Still sitting on the fence myself but I was going to call the guy about the possibility of a discount on a couple of kits. Haven't got round to it yet. I can do this tomorrow if you want to hang on, James?

.. and then the Westfield Sports Car Club forum organise a bulk buy of close ratio gearboxes  

Economical Omega or (even more) bonkers Westfield  :-/

Kevin

33673

General Discussion Area / Re: LPG installation WIP

« on: 16 October 2007, 20:04:54 »

How did you secure the pipe run from back to front, Martin?

Did you drill new holes and rivet "p" clips on or did you find a way to use the existing fastenings for the new pipe?

Cheers,

Kevin

33674

General Discussion Area / Re: LPG installation WIP

« on: 16 October 2007, 14:19:34 »

NO insurance company will touch you after a DIY install..

This is what I thought. Hence the need, IMO, for it to be certified by someone who's happy not just to sign the certificate but, if necessary, to allow the impression to be given that he professionally installed it.

Kevin

33675

General Discussion Area / Re: LPG installation WIP

« on: 16 October 2007, 14:09:07 »

I have the contact details for the chap (asked for them from his EBAY ad) as I wanted to ask him a few questions so I will give it a day or two to see if there's any more interest and then give him a call and see what's what.

He's only 40 mins drive from me, so I could collect all the bits and distribute them via the "OOF network" which might save some carriage.

What are you doing about certification, Jay w?

That's the only thing that concerns me a little. I want to end up with something that's insurable at the end of it all!

Cheers,

Kevin