AEB Leonardo vs Galileo?

[CNG]

I asked about how they compare. Reckon this subject wants a fresh thread:

Gilbertd wrote......

As for the difference between the Leo and the Galileo, I don't like the Galileo software, the only version I have managed to find doesn't have the nice graphical display of the stepper position, just a numerical reading, difficult to read when the laptop is in the passenger footwell for testing purposes. Although it isn't possible to set different stepper limits for idle and out of idle throttle positions, I have noticed that at idle, the stepper will always stop 10 steps below the maximum but will go to maximum at out of idle (if it needs to). Fuel consumption is worse on the Galileo equipped car but I suspect this is down to it using one of the 5-0V sensors as they are known to stop giving an output at idle. The petrol ECU recognises this and goes open loop but the Galileo sees it as lean so it will run rich at idle. I intend fitting another boss and using a 0-1V sensor the same as on the Leo equipped car. With the Galileo you can't simply Tee the purple wire into the existing sensor output either as that applies a voltage which is sent to the petrol ECU and buggers up running on petrol, it has to be intercepted as the manual shows. Knowing what I now know, I'd have fitted a Leo but as I already had the Galileo, I used it. Plus I've managed to fit the slim, square AEB119B in a convenient place where the chunky Leonardo switch wouldn't easily go.

Seems despite being a later design, it is actually no better, arguably worse, certainly in the above set-up? Which is odd. And the Leo is NLA? The software 'looks' more polished. Apparently not.

[Gilbertd]

It does the job. Another gripe, in addition to the software display, is that it doesn't have the diagnostic feature like the Leo. On a Leo, when you start running out of gas, it detects lambda lean for too long and starts flashing the yellow LED. When driving at a constant speed, it isn't always noticeable that nothing will happen if you give it more throttle so the flashing light is a good indication that it is time to switch over to petrol but the Galileo doesn't do this. I also don't like having to manually connect the software, the Leo does it automatically.

I wouldn't say it is worse, just different. If you'd never played with a Leo and its software, you wouldn't have any complaints, it still controls the stepper according to the lambda output.

[Pinger]

Noted is your comment on the different wiring for the O2 sensor - I'll bear that in mind if I ever have to install my standby Galileo - and figure out how it handles two O2 sensors. Presumably only sampling from one.
Back when the Galileo was being discussed, there was mention that the Galileo may operate the stepper inversely - closing it where Leo would open and vice versa, Is this the case if the original Leo stepper is utilised? Ie. does the Galileo ECU require the designated Galileo stepper. I'm guessing you installed Galileo in entirety and can't answer that question but any info on it is appreciated.

[Gilbertd]

The steppers are the same. I bought 2 Galileos as to buy the complete system that Mick was selling them at was cheaper than buying a replacement spare stepper for the Leo. My car, with a Leo installed, is using one of the brand new Galileo steppers, so they are interchangeable.

As for only reading off one sensor, think about it. With a single point system you are injecting fuel at a common point, so the lambda reading on both banks will be the same (unless you've got a serious problem on one bank) so it doesn't matter if you are reading from one, the other or both.

[CNG]

Steppers are definitely the same item. I too bought some of Mick's stock, and by all accounts for the same reason. Back-up for the day I can't source a Leo. I too am using a Galileo Stepper with my Leo.
Loom colours are the same - I've said before - I tried, you can't swap switches between the two.

[Pinger]

The steppers are the same. I bought 2 Galileos as to buy the complete system that Mick was selling them at was cheaper than buying a replacement spare stepper for the Leo. My car, with a Leo installed, is using one of the brand new Galileo steppers, so they are interchangeable.

Cheers - good to know. I have my Galileo with adaptor plugs ready to plug into my Chevy should it be needed. Or just a stepper.

As for only reading off one sensor, think about it. With a single point system you are injecting fuel at a common point, so the lambda reading on both banks will be the same (unless you've got a serious problem on one bank) so it doesn't matter if you are reading from one, the other or both.

You are right. What skewed my thinking was a recent wiring problem with my two upstream sensors. Fixing only one wasn't sufficient for it behave on either LPG or petrol. The problem though could have been shorts rather than breaks. I just bypassed the suspect wiring so didn't probe that aspect any further.

[CNG]

Just bought two used Bigas Pegaso via eBay. As spare for the day when mine pops. Both have the same problem. Work well enough, until you disconnect the battery. Settings are lost and have to be restored via PC. I'm guessing it's one of the capacitors on the board or maybe the chips 'burned' to ROM.

[LPGC]

Just bought two used Bigas Pegaso via eBay. As spare for the day when mine pops. Both have the same problem. Work well enough, until you disconnect the battery. Settings are lost and have to be restored via PC. I'm guessing it's one of the capacitors on the board or maybe the chips 'burned' to ROM.

Common problem with older AEB175s.

In some cases settings don't go back to default, instead they are kind of randomised, so you might for example find it won't switch to LPG because it's set itself not to changeover until the reducer temp reading is warm and the reducer temp reading will never be warm because there isn't a reducer temp sensor fitted.

Never tested to see if it was a capacitor fault, presumed it was an old chip / flash memory fault.

[CNG]

Ah, thanks Simon. It's not just me then.

Paranoid that I'll be left high and dry, I like a surplus AEB175 or two and spare reducer ready to swap-in. Also bought one of Mick's stock of Bigas Pegaso. Not sure why - it stores error at start-up. Clears via the switch easily enough then works best of all my AEB175.It responds faster and keeps stoich closest. Thing is, my OMVL Millenium does not store errors, despite being set-up for ERROR REPORTING. Maybe Mick's is also old stock?

Looking into why now. Could be my set-up, but somehow I doubt. I've ordered another of Gilbert's favs, a Ford O2 sensor. Any NTK OZA659-EE43 is £12.50 delivered for cryin' out. Definitely the right way to go. You can pay 10 x that for an O2.

[Pinger]

On a Leo, when you start running out of gas, it detects lambda lean for too long and starts flashing the yellow LED. When driving at a constant speed, it isn't always noticeable that nothing will happen if you give it more throttle so the flashing light is a good indication that it is time to switch over to petrol but the Galileo doesn't do this.

Have you considered installing an AFR gauge on the dash? They aren't necessarily the last word in accuracy but do give a reasonable indication of what's going on. Accurate enough I think that you'd notice it leaning off.

[Gilbertd]

I hadn't but all it would need is something to show a lack of movement on the lambda sensor output. I suppose I could knock up something with a 555 timer chip that would be reset every time the lambda switched and as soon as it stopped switching, bring on a light as a warning. ! might even have a 555 kicking around somewhere.....

[Pinger]

I hadn't but all it would need is something to show a lack of movement on the lambda sensor output. I suppose I could knock up something with a 555 timer chip that would be reset every time the lambda switched and as soon as it stopped switching, bring on a light as a warning. ! might even have a 555 kicking around somewhere.....

When I had my O2 sensor wiring issue I replaced the AFR gauge in case it was at fault - it wasn't. If you want it, PM me a postal address and I'll send it to you - if you want it that is.

[Gilbertd]

Thanks for the offer but not sure where I would put it on a P38 dash....

[Pinger]

Fair enough - if you change your mind though, just give me a shout. Pic below of where I have mine - wedged in a cubby hole.

IMG_4941 (2).JPG (771.45 KiB) Viewed 4198 times