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post #1 of 12 (permalink) Old 11-14-04, 04:14 AM Thread Starter
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Trip Computer works with LPG?????

Hey all,

While out driving to pickapart today, was playing with the trip computer to see my instant usage, etc

I changed over to LPG and the Trip computer is telling me HOW MUCH LPG IM USING???

Everything cept for the REMAINING K's is working on LPG.

How is this possible? The LPG has a "Feedback" LPG Computer connected to it in the engine bay and is wired into the engine bay. The LPG was installed only in '99 So is this possible?? I mean when its on LPG, you cant here the injectors so its not like its pumping both in. Has anyone else had this? Had me and john_xr6 stumped


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post #2 of 12 (permalink) Old 11-14-04, 04:17 AM
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Re: Trip Computer works with LPG?????

who knows?, mine still works to it "thinks" its using fuel, maybe its wired in but havent seen such a thing like will tell me how many k's im using per 100 and stuff but range usualy goes up and down freeway it goes up and local driving goes up with all the start stopping

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post #3 of 12 (permalink) Old 11-14-04, 05:21 AM
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Re: Trip Computer works with LPG?????

yeah i found that pretty odd aswell, seems about right with the figures it gives out in relation to throttle postion and the load on the engine.

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post #4 of 12 (permalink) Old 11-14-04, 06:38 AM
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Re: Trip Computer works with LPG?????

in earlier cars, the ECU still operates the injectors when in LPG mode.. theyre just disconnected. so what the t/c reads is what fuel the ECU is thinking its putting into the engine. all 3 falcons ive seen on aftermarket LPG have operated this way.

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post #5 of 12 (permalink) Old 11-14-04, 03:50 PM Thread Starter
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Re: Trip Computer works with LPG?????

ohhh so it "thinks" its putting petrol in it, but it isnt infact.

1991 Ford Falcon EA 30th Anniversary

EF head | EF XR6 Cam |Pacemaker 3320(?) extractors | Hiflo cat
3:23 | Auto | XH Snorkle | Thermos | 2.5" Mandrel Exhaust
Full NC2 Sportsman Interior inc Dash & Electrics
Custom Clear Tailights and Garnish
Sprint kit | Moffat front bar (soon) | king lows
FTR Chrome Rims | Driving lights | Custom ED Mesh grill
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post #6 of 12 (permalink) Old 11-14-04, 04:12 PM
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Re: Trip Computer works with LPG?????

yeah i got the same thing happening with my trip

i just wonna figure out how to do the dte

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post #7 of 12 (permalink) Old 11-14-04, 04:35 PM
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Re: Trip Computer works with LPG?????

It's not actually working mad_Ea_spac. Like galapogos said, the ECU stilil reckons it's feeding fuel to the motor so it's still doing all it's little calculations. The DTE, Inst. Ave. Consumption and Ave. Consumption all work off the injector pulse wire on the ECU.

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post #8 of 12 (permalink) Old 11-14-04, 04:39 PM
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Re: Trip Computer works with LPG?????

well if you could wire the lpg guage somehow to get the same resistance's as the stock one the dte would work

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post #9 of 12 (permalink) Old 11-14-04, 04:44 PM
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Re: Trip Computer works with LPG?????

Yeah but who can be ****ed, it's always out anyhow.

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post #10 of 12 (permalink) Old 11-14-04, 04:53 PM Thread Starter
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Re: Trip Computer works with LPG?????

Ive considered wiring it up to the LPG, but really cant be stuffed doing it now lol
when its straight LPG again, ill look at it

1991 Ford Falcon EA 30th Anniversary

EF head | EF XR6 Cam |Pacemaker 3320(?) extractors | Hiflo cat
3:23 | Auto | XH Snorkle | Thermos | 2.5" Mandrel Exhaust
Full NC2 Sportsman Interior inc Dash & Electrics
Custom Clear Tailights and Garnish
Sprint kit | Moffat front bar (soon) | king lows
FTR Chrome Rims | Driving lights | Custom ED Mesh grill
Pioneer of the Clear ED tailights
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