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Chat Area => General Car Chat => Topic started by: feeutfo on 12 May 2011, 12:31:02

Title: LPG ecu location
Post by: feeutfo on 12 May 2011, 12:31:02
Under the power sounder. Bolted to the wheel arch. Thoughts?

There is a drain there from the scuttle. Going to be difficult to miss the water flow. However it would mean injector wiring can come in from behind the plenum. And there's just enough loom to reach the fuse box ecu plug. Only thing will be getting the wires round the pollen filter box.

(http://i344.photobucket.com/albums/p326/chrisgixer/3652f1e8.jpg)
(http://i344.photobucket.com/albums/p326/chrisgixer/d906f3a1.jpg)
Title: Re: LPG ecu location
Post by: feeutfo on 12 May 2011, 12:35:05
Also wiper mech may well have to come out to drill mounting holes. :-/
Title: Re: LPG ecu location
Post by: tigers_gonads on 12 May 2011, 13:50:14
was thinking of that myself  :-/

Now looking for a way to get it inside the cabin  :-/
I don't fancy it behind the bumper somehow  :-/
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 14:02:18
Tbh, I still think the best location is where we've been mounting them :-/
Title: Re: LPG ecu location
Post by: tigers_gonads on 12 May 2011, 14:17:08
Has anybody ever mounted it on the side of the air filter box, inner wing side ?

Looks like they might be room  :-/
It should be dry and at least it shouldn't get trashed if you have a small front end bump  :-/
Title: Re: LPG ecu location
Post by: feeutfo on 12 May 2011, 15:20:48
Was wondering about another option, mounted to the support/webs on the moulding of the fan assembly behind rad with two L shaped brackets. There room between that and the intakes just left of multi ram as you look in the engine bay. Bit warm maybe?

Certainly wheel arch lining area is simpler as there'll be extra length of wiring to hide, or bugger about shortening and re fitting plugs. :-/
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 15:22:31
Quote
Has anybody ever mounted it on the side of the air filter box, inner wing side ?

Looks like they might be room  :-/


At the end of the day it's your car... To me it seems a bit "Bodgy" so I'll be mounting it behind the front bumper as I have with all the previous ones I've done... It's tried and tested :y

I want as much as possible hidden away as before so it's not visible ;)

I did consider the other side though :-/

Quote
It should be dry and at least it shouldn't get trashed if you have a small front end bump  :-/

The ECU is water tested and fine as long as the connector is down ;)

As for trashing it in a bump... If you manage to trash the ECU in a front end shunt you have much bigger things to worry about ;)
Title: Re: LPG ecu location
Post by: TheBoy on 12 May 2011, 15:27:24
chrisgixer - remember, the instructions say to mount vertical, with connectors pointing downwards.  This is what might knacker your chances with finding other locations.

Mounted just in front of self levelling pump is tried and tested, but you will need to extend cables should you want the wires to from the back of the plenum
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 15:30:53
Quote
chrisgixer - remember, the instructions say to mount vertical, with connectors pointing downwards.  This is what might knacker your chances with finding other locations.

Mounted just in front of self levelling pump is tried and tested, but you will need to extend cables should you want the wires to from the back of the plenum

I'm not sure if I'm imagining it, but ISTR that the rear of the plenum is shaped and getting the loom in under there might be a bit tight :-/ :-/
Title: Re: LPG ecu location
Post by: TheBoy on 12 May 2011, 15:36:53
Quote
Quote
chrisgixer - remember, the instructions say to mount vertical, with connectors pointing downwards.  This is what might knacker your chances with finding other locations.

Mounted just in front of self levelling pump is tried and tested, but you will need to extend cables should you want the wires to from the back of the plenum

I'm not sure if I'm imagining it, but ISTR that the rear of the plenum is shaped and getting the loom in under there might be a bit tight :-/ :-/
Multiram is also there ready to get jammed in the wires...  ...personally, I am liking TBE's method more and more, esp when I had to pop out the inlet maifold yesterday :D
Title: Re: LPG ecu location
Post by: tigers_gonads on 12 May 2011, 15:40:02
This is my first LPG conversion so bumper it is  :y

I'm sure they will be plenty more daft questions in the near future over this conversion  ;D ;D

thanks
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 15:40:05
Quote
Quote
Quote
chrisgixer - remember, the instructions say to mount vertical, with connectors pointing downwards.  This is what might knacker your chances with finding other locations.

Mounted just in front of self levelling pump is tried and tested, but you will need to extend cables should you want the wires to from the back of the plenum

I'm not sure if I'm imagining it, but ISTR that the rear of the plenum is shaped and getting the loom in under there might be a bit tight :-/ :-/
Multiram is also there ready to get jammed in the wires...  ...personally, I am liking TBE's method more and more, esp when I had to pop out the inlet maifold yesterday :D

I like the method and if the loom is prepared in advance I think it's probably advantageous and quicker :y

Ohh... Manifold out.... Oil Cooler?
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 15:41:15
Quote
This is my first LPG conversion so bumper it is  :y

I'm sure they will be plenty more daft questions in the near future over this conversion  ;D ;D

thanks

Either make the brackets to mount it or attach it to the wheel arch liner... Important thing is that the plug is pointing downwards :y
Title: Re: LPG ecu location
Post by: Andy B on 12 May 2011, 15:41:21
How about inside the air filter box? That's where the engine ECU lives on her Smart, it's dry & gets a cooling air flow.  :-/

Just a suggestion.  :y
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 15:42:38
Quote
How about inside the air filter box? That's where the engine ECU lives on her Smart, it's dry & gets a cooling air flow.  :-/

Just a suggestion.  :y

It's a very large wiring loom to come out and anyway... That's an even bigger bodge! :o :o :o
Title: Re: LPG ecu location
Post by: Andy B on 12 May 2011, 15:45:04
Quote
....... and anyway... That's an even bigger bodge! :o :o :o

How's it a bodge?  :-? I'd have thought that if it was good enough for Mercedes ......  ;) ;)
Better than dangling in water inside the pollen filter housing where some have been fitted.  ;)
Title: Re: LPG ecu location
Post by: TheBoy on 12 May 2011, 15:51:47
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....... and anyway... That's an even bigger bodge! :o :o :o

How's it a bodge?  :-? I'd have thought that if it was good enough for Mercedes ......  ;) ;)
Better than dangling in water inside the pollen filter housing where some have been fitted.  ;)
My brother used to do a lot of remedial design work for Mercedes...  ...he didn't have a good word to say about their designers....
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 15:57:31
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Quote
....... and anyway... That's an even bigger bodge! :o :o :o

How's it a bodge?  :-? I'd have thought that if it was good enough for Mercedes ......  ;) ;)
Better than dangling in water inside the pollen filter housing where some have been fitted.  ;)

Because it's a large solid object that will obstruct air flow ::) ::) Mercedes may have designed it that way, but it's not ideal  ;) ;) Plus, you'd have to cut a rather great hole to get the loom through ::) ::)

Oh... And as for the Pollon Filter area... I agree... That's a bodge too, hence why I suggest mounting it where I do ;) ;)
Title: Re: LPG ecu location
Post by: albitz on 12 May 2011, 16:08:09
Reading this thread, I have just became aware that my ECU is currently upside down. ::) :-[
Title: Re: LPG ecu location
Post by: Andy B on 12 May 2011, 16:20:39
Quote
.....
My brother used to do a lot of remedial design work for Mercedes...  ...he didn't have a good word to say about their designers....

I doubt he'd have a good word for the Smart's build quality either. eg  the wires to the bulb holders for the rear lights are little more twisted onto the loom, and the bulb holders at the front are prone to melting. As for leaks into the car ....  :-? :-? :-? :-?
Fantastic to drive through the twisty lanes though!  :y :y :y :y
Title: Re: LPG ecu location
Post by: tunnie on 12 May 2011, 16:33:03
mine works well bolted to wheel arch lining, but unlike those pesky V6's the arch does not have the vents.

(http://dl.dropbox.com/u/803897/Omega/LPG/Day2and3/DSC00668.JPG)

I inspected it few weeks ago, looked like new!
Title: Re: LPG ecu location
Post by: 2woody on 12 May 2011, 16:43:19
I have a good examplee or two of where not to put it ....!

how about stuch to the wheel arch-liner (inner surface against the wheel) with no-more-nails

or how about in the air cleaner.

What's wrong with the fuse box where the ECUs are supposed to live ?
Title: Re: LPG ecu location
Post by: albitz on 12 May 2011, 16:46:02
Quote
mine works well bolted to wheel arch lining, but unlike those pesky V6's the arch does not have the vents.

(http://dl.dropbox.com/u/803897/Omega/LPG/Day2and3/DSC00668.JPG)

I inspected it few weeks ago, looked like new!

N/S doesnt have the vents. ;)
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 16:49:51
Quote
I have a good examplee or two of where not to put it ....!

how about stuch to the wheel arch-liner (inner surface against the wheel) with no-more-nails

or how about in the air cleaner.

What's wrong with the fuse box where the ECUs are supposed to live ?

I just can't see how to get it in there TBH... It's not as small as the one pictured above...

(http://farm4.static.flickr.com/3241/2778257159_1e4cc8ace4_z.jpg) (http://www.flickr.com/photos/24961476@N08/2778257159/)
IMGP0209 (http://www.flickr.com/photos/24961476@N08/2778257159/) by lazydocker (http://www.flickr.com/people/24961476@N08/), on Flickr
Title: Re: LPG ecu location
Post by: albitz on 12 May 2011, 16:53:56
Istr Jamesv6 fitted one in the engine fusebox a year or so ago.
Would be a very tight fit though.  :-/
Title: Re: LPG ecu location
Post by: TheBoy on 12 May 2011, 17:00:06
DBW ECUs are smaller than older ones, but still wouldn't go.

personally, I'd make a bracket and mount where I have.  I think the tunnie/GayBoyGixer method if screwing to the liner is a bit of corner cutting....
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 17:00:46
Quote
Istr Jamesv6 fitted one in the engine fusebox a year or so ago.
Would be a very tight fit though.  :-/

Yeah... Still can't work out how he managed it though :-/ :-/

<Runs off to look for the thread> ::)
Title: Re: LPG ecu location
Post by: tunnie on 12 May 2011, 17:19:11
Quote
Quote
mine works well bolted to wheel arch lining, but unlike those pesky V6's the arch does not have the vents.

(http://dl.dropbox.com/u/803897/Omega/LPG/Day2and3/DSC00668.JPG)

I inspected it few weeks ago, looked like new!

N/S doesnt have the vents. ;)

Yeah but thats bit too far for the loom. O/S is where mine is mounted, as it has no vents, its a perfect place for it.
Title: Re: LPG ecu location
Post by: feeutfo on 12 May 2011, 17:21:45
No way I'll it fit in the ecu fuse box, with the plug attached I'd guess it's about 6" square and may 1.5" deep. The plug being roughly 1/3 of that area, which either it or the 1" thick loom has to be fed through somewhere.

I fitted to the wheel arch liner last time, but the plug was at the top. I was aware of the issue tbh. Would be nice to get the wires through the back of the plenum. And just lift the lot out and place to one side if needing to remove manifold for oil cooler work etc.

I'll look at it further. But probably revert to wheel arch area as TB's... But mine will be better of course. 8-).  ;D
Title: Re: LPG ecu location
Post by: albitz on 12 May 2011, 17:23:35
Course it will be better. The car is Black. :y ;D
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 17:36:39
Yep... Think mine will be on brackets in the same place as TBE and the loom will be the same as well :y
Title: Re: LPG ecu location
Post by: omegod on 12 May 2011, 18:19:22
Mine is in next to the ecu. Looks well smaller than that one though! 
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 18:24:55
Quote
Mine is in next to the ecu. Looks well smaller than that one though! 

Depends what brand it is ;) ;)

The STAG 300 ones are about the size of the one I pictured... Behind the bumper is actually a pretty good place to hide it away IMO, completely out of sight and, apart from a little extending of wires and the actual LPG injector wires everything drops in nice and easy and can be reasonably well hidden :y
Title: Re: LPG ecu location
Post by: omegod on 12 May 2011, 20:26:41
Mines a koltec and the ecu.s about the size of a fag packet
Title: Re: LPG ecu location
Post by: Martin_1962 on 12 May 2011, 20:43:30
Quote

or how about in the air cleaner.



BODGE

Blocks the airflow, had this problem with my last car, done by a bloddy professional installer - hence the spate of DIY installs
Title: Re: LPG ecu location
Post by: Lazydocker on 12 May 2011, 20:44:43
Quote
Mines a koltec and the ecu.s about the size of a fag packet

If yours is koltec then prey it doesn't go wrong! It's a different animal and what vauxhall used to fit as "Factory Fitted" LPG. Hardly anyone will work on them and parts can be hard to find if you're not near one of the few places that will look at them.
Title: Re: LPG ecu location
Post by: omegod on 12 May 2011, 21:24:28
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Quote
Mines a koltec and the ecu.s about the size of a fag packet

If yours is koltec then prey it doesn't go wrong! It's a different animal and what vauxhall used to fit as "Factory Fitted" LPG. Hardly anyone will work on them and parts can be hard to find if you're not near one of the few places that will look at them.

The original installers are in yorkshire. Had it serviced by them when i bought it, heard they can be tricky. It.s done 125.000 on
Gas so fingers crossed
Title: Re: LPG ecu location
Post by: Ken T on 13 May 2011, 16:40:14
I put my ECU on the bulkhead, behind the steering pump reservoir.

(http://i159.photobucket.com/albums/t155/lapbits/PICT3133.jpg)

Plenty space to get the wiring out and into my trunking.

Ken