Is English you're native tongue ?

An answer thats on track;
Painting the grille is one option, there are several replacement grilles
"out there" for AU's.
Which grille is in your AU?
I have a "Classic", which tongue-in-cheek I can say is one of the classic
cars of time.
To improve the looks of my AU1 I have replaced springs with XR spec' springs
and replaced wheels with later and larger XR wheels.
I'm also still looking for another grille, I would like an XR style
bar-grille that would be a bolt-in replacement but I haven't found anything
like that YET.

GB

There shouldn?t be that big a difference in power between ULP and LPG,
the reason most LPG vehicles produce lower power is because gas has
lower BTU (British Thermal Units = energy per volume etc), but gas has
a higher octane rating than PULP, so to get power out of LPG you
require slightly higher compression ratio (Australia gas quality
limits this) and altered timing to suit, normally more initial timing
and less total than what is required for petrol.

You ECU can not adjust to these settings from the factory, and you
don?t want this for petrol because it would only cause the engine to
ping.

Back firing is normally caused by lean mixture and a combination of
leads (most common), plugs and maybe coil. As you will most likely run
LPG more often because of price you are better to replace plugs with
plugs one or two heat ranges cooler, replace leads with the best leads
you can find (Genuine Ford are crap for lasting, I used to work in a
few dealerships), ask around and don?t just believe the first sales
person etc.

Sounds like you AU needs a good LPG tune, the stepper motor between
the converter and mixer is for economy, it works in close loop, it
doesn?t do much for power or idle etc, the rest needs to be adjusted
and many fitters etc stuff it up (including me   )

CAT back exhaust is exactly that, a new exhaust fitted after the
catalytic converter, the converter is normally an expensive item so it
is seldom replaced, but the AU converter flows well and shouldn?t be
replaced unless it is damaged etc.

If you ask for a AU Tick ford snorkel it will fit straight on (slight
mods to fit one to a E series etc), remove the two screws from the top
of the old one, pull the snorkel towards the other side of the car and
do the reverse to fit the new one.

Out of interest, is it a sedan or wagon.

Have I missed something, I am not the best for info on I6, there is
far better than me for this info, I just worked on them for years, my
interest is in Windsor V8s etc.

"sfrrob" <UseLinkToEmail@New & Used Cars Forums - AutoForumz.com> wrote in
message news:422498a2

Look for another installer.

I've had lpg powered vehicles for over 25 years, and the performance
difference between gas & petrol should be barely noticable if it's set up
correctly. Backfiring on lpg is a rare problem on Fords, and I'd be checking
your car's ignition system very carefully...

A "catback" exhaust simply means changing the exhaust system for a more
"free flowing" one from the catalytic converter back. This is a *very* low
power mod, to the point that you'd barely notice a difference, as the
biggest changes to be had from exhaust systems are in the front half.

A Catback will probably change the exhaust note, and not much more.

Well, if you've got that sort of money, put a supercharger or turbo on it.

No other single mod will give you anywhere near the same level of
performance.

Not as far as I'm aware.

All you're talking about here is a slightly larger than stock air intake
"snorkel" that bolts onto the air filter box in place of your standard one,
and it's doubtful that you'd notice any difference in performance by just
doing that alone.

--
Regards,
Noddy.