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runs rough on petrol, lpg is fine 

 

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 Post subject: runs rough on petrol, lpg is fine
Posted: Tue Feb 12, 2013 7:36 am 
Stock as a Rock
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Age: 37

Posts: 193

Joined: 15th Feb 2009

Ride: DF LTD

Location: Melbourne
VIC, Australia

So yeah, like the title says, it runs rough and sluggish on petrol, seriously under powered.

Back in the day when I first got the car, I did the usual small mods and managed to get 120kw to the floor on petrol and 93kw to the floor on lpg.
Now the lpg makes WAY more power than petrol, and I have no idea why, I've gone through replacing plugs and leads, cleaned the oxygen sensor, checked the cap and button, checked and set the base timing, ect ect.

The fuel pump was replaced recently, I did the fuel filter and Injectors just before that.
The thing that's most notable is that after a while of driving the car will just randomly start running like s**t, the idle becomes rough and you can't even accelerate on petrol, I'm usually forced to switch over to lpg in which case it runs fine?

Any info and help would be appreciated!
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 Post subject: Re: runs rough on petrol, lpg is fine
Posted: Sat Feb 16, 2013 8:59 pm 
Getting Side Ways
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Age: 42

Posts: 4125

Joined: 8th Dec 2004

Gallery: 25 images

Ride: EB2 Ghia,Mighty Boy,Eb1 Xr8 5spd

Location: ** In the Shed! **
VIC, Australia

Fuel pressure reg issues?

Cheers

ToranaGuy

 

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 Post subject: Re: runs rough on petrol, lpg is fine
Posted: Wed Feb 27, 2013 12:19 pm 
Stock as a Rock
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Age: 34

Posts: 190

Joined: 14th Sep 2010

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Ride: BA XR6 206RWKW ;)

Location: greensborough
VIC, Australia

injectors? or fuel regulator?
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 Post subject: Re: runs rough on petrol, lpg is fine
Posted: Thu Mar 07, 2013 3:23 pm 
Smokin em up
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Posts: 270

Joined: 1st Sep 2007

Location: melbourne
VIC, Australia

l have a new v8 fuel rail and regulator if interested

gassa

 

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