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LPG power loss 1991 DC LTD 5L 


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 Post subject: LPG power loss 1991 DC LTD 5L
Posted: Thu Nov 20, 2008 9:22 pm 
Fordmods Newbie

Posts: 3

Joined: 3rd Aug 2008

Location: melbourne
VIC, Australia

Hi ,

I was wondering if anyone can assist.

I have a 5L 1991 LTD on dual fuel, when on petrol the car run fine, when I switch to LPG it basically has no power.

If idling when i touch the accelerator there is a hesitation before the RPM's come up, when I put the car into gear ( under load ) it runs rough and has no power to accelerate, it feels like it's not getting enough gas.

This problem only started the other day I was driving on LPG and it was running great stopped the car and when I restarted it this problem ocuured.

Could it be electrical is there much difference between petrol and gas with regard to ignition, it does feel a bit like it's only running on 7 cylinders but when I switch to petrol it's fine, ???????

any help would be greatly appreciated.
Posted: Wed Dec 31, 2008 9:23 pm 
Getting Side Ways
User avatar

Age: 36

Posts: 613

Joined: 5th Aug 2007

Location: Ararat
VIC, Australia

Have a look through this forum- its fantastic for us gas users!!!

But what sort of Gas system are you using? What the economy like?

Could be leaning out- could be gummed up with wax(common issue)
Do you have a power screw on your convertor? Is it allowing enough vapour into the mixer? Timing issue? Bad gas? Screwed convertor?

The list is endless- Im afraid its trial and error mate



EF Ghia 5L V8
BAMk2 XR8 Velocity/Cobra 19's

Posted: Tue Jan 06, 2009 7:47 am 
Getting Side Ways
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Age: 43

Posts: 732

Joined: 5th Nov 2004

Gallery: 1 images


Location: South eastern
VIC, Australia

Did you fix the issue?

LPG is very sensative, It's check for vacc/gas leaks first.
Posted: Sat Jan 17, 2009 2:45 pm 
Oompa Loompa

Age: 49

Posts: 30

Joined: 4th Nov 2007

Ride: Fairlane

Location: Brisbane, Northside
QLD, Australia

Read my post I made where I fixed the problem myself, maybe you might have the same problem and can have the same fix.
Posted: Sat Jan 17, 2009 3:23 pm 
Getting Side Ways
User avatar

Age: 45

Posts: 2688

Joined: 21st Oct 2007

Gallery: 28 images

Ride: NCII Fairlane + G220

Power: 143 rwkw

Location: Lake Macquarie
NSW, Australia

As LTDHO suggested, check for Vaccuum Leaks first.
After I had a backfire recently, mine was running was idling like a pig and surging under acceleration. When I poped the bonnet, I could hear a hissing sound. Turned out to be a Vaccuum line which connects to the rear of the upper intake manifold (mine has an explorer, so might not be the same as yours???) had popped off. Plugged it back on and the improvement was instant.



E-Series Fairlane/LTD? forums/post746329.html#746329
Mick's Garage forums/viewtopic.php?t=65504

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