Hi,

As this is mainly on the petrol side of operation, I though I'd leave it in the non-LPG forum, thought the gas system may play a part...

So when I travelled overseas for a month, no one ran the AU II on petrol at all for the duration of that month. After returning, I found that it couldn't start on petrol any more.
Suspected clogged injectors, so I took them out and cleaned them--no luck, still have the problem.

Further details:
I found that after starting on LPG (IMPCO 200 mixer), *most* of the time I can switch over to petrol and it runs smoothly FOR A SHORT TIME. I can't rev it very much. It stalls after 20 sec or so, depending on how hard I *try* to rev it. The symptoms are initially it revs quite high, then struggles more and more, even pressing the accel to floor the revs continually drop and eventually stalls on petrol. If I leave it idling in neutral after starting on LPG and switching to petrol, it can idle for several minutes maybe, but will stall eventually. Touch the accel pedal excessively and game over.

So I'm suspecting a fuel pressure issue? I can hear the pump upon turning the key to ON, so the fuel pump motor must be spinning.

that is very true it is turning on but might not be getting pressure

ive seen fuel pumps on ebay for $45 best thing to do is buy a pump then if not injectors did it to my car and its like a whole new vehicle since fitting the fuel pump

awesome. i'll give it a go--any idea how much a genuine from Ford dealer is?

I'm not sure about the injectors, since the rare occasions it does run (for a short while) on petrol, it's firing OK...

just preemptively, what should i look at if a new pump doesn't fix it?
-already changed fuel filter (didn't help)
-fuel pressure regulator?--what happens when this goes bust: too much or not enough pressure??
-any other parts long the fuel supply/return lines?

thanks

the fuel pressure regulator should be ok well we can hope

the pump i would just get an ebay item and just run it once a fortnight 50-100km on petrol very simple to uninstall and install pm if you need help on how to

but i wouldn't bother with genuine parts

awesome, thanks!

hi all,

an update: replaced the fuel pump today with one bought of ebay... no difference!

now i'm stuck for ideas...
it started on petrol the other day and idled in neutral for quite a while (even before i swapped the pump), but stalled when i took a test drive.

now it won't crank over on petrol, and if i start on LPG and switch over, it will immediately stall.
no more running for a few secs with dropping revs until an eventual stall!

help!

Sounds like you've had e10 fuel sitting in you're tank going stale.
Have you put new fuel in it since you've been back?
May be worth trying a ECU re set

hmm this is very strange , cheek if the fuel filter you can blow thru it with a little difficulty only

and then maybe go to a pick a part wreckers and "aquire" some injectors if they help then go on ebay and buy new ones

how much fuel was in the tank when you did the pump ?

sounds like stale fuel but AU's from my experience are not to fussy on fuel's

Oh no way did I put e10 in there.
In fact when I got back from that month away (back start June) I put in some I flashlube injector cleaner into the half tank that I had cos I suspected cloggage

Then I filled her up with bp ultimate or shell vortex (ron98--can't remember) trying to dither clean the suspected injector problem
This is when the problems began. No more driving on petrol at all.

So can it be injectors if like one out of 20 times (not in sequence, but on random days) it seems to run smoothly on petrol just idling?
I would have thought injector problems would be choppy all round

Shell v-power, caltex vortex I believe not that it matters.
Try a ECU reset but it sounds like a blockage.
Try running it on petrol as some one sprays some rapid start/ start ya bastard up her and see if you can get her to rev up and clear out some s**t

Yep that's what he should do, He should steal injectors for someone and then ebay some new ones.

you're a f**k

well f**k i feel guilty for convincing the OP that it was the fuel pump when clearly it was not

plus wrecker injector's die out after a couple weeks of use i have seen it first hand someone in there monty used about 8 sets and had a glove box full of them and i asked why and ya

haha no worries. i bought the pump off ebay and it seemed pretty good... though it does make a much louder whirring/grinding noise when you turn the key to ON than the VDO one that was originally in there. not sure if that is normal.

so you guys reckon it's injectors?
is it worth taking them out again and pumping carby cleaner thru them under pressure to clean them out?

what about the fuel pressure regulator? what's the symptoms on those?

I just changed the fuel filter 2 weeks ago, so it won't be that.

and the fuel tank is FULL right now of ron98, with some flashlube diluted from the prev 1/2 tank treatment (put flashlube into ron91 when about 1/2 full, ran that down to near empty, filled up with ron98). the ron98 has been sitting there for almost 2 months tho.....

actually if you let it idle on petrol and one at a time remove each injector plug , you may notice when you remove one injector it doesn't make much of a difference in idle , if so then its a buggered injector but that's not a 100% accurate way of testing

I can't get it to run on petrol at all at the moment
How likely is it the fuel do u think?
If ron98 sitting in tank for 2 months is too far gone then nothing will appear work so thinking I ought need to siphon out and change it