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Rough idle, efi 302 on gas. any suggestions on the cause? 

 

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 Post subject: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 12:41 am 
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hi all,
I have a 94 NC fairlane 5.0L on dedicated gas, am currently having trouble with rough idle.

any suggestions or help appreciated

Cheers
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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 12:54 am 
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Way too broad of a question. Need a lot more details.

Like when was the last service? Dedicated gas? Is it gas research, Impco or a custom injection setup? What ignition system is it using? Checked for vacuum leaks?

Cheers

ToranaGuy

 

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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 12:55 am 
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stewboy wrote:
hi all,
I have a 94 NC fairlane 5.0L on dedicated gas, am currently having trouble with rough idle.

any suggestions or help appreciated

Cheers

plugs.leads

 

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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 5:31 pm 
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ah ok, honestly couldn't tell ya if its gas research or what system it is, just bought it 2 days ago, how can i find out? was gunna check for vacuum leaks next.

plugs and leads are near new, gunna do a major service asap and see what comes of it.

cheers
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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 5:46 pm 
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stewboy wrote:
ah ok, honestly couldn't tell ya if its gas research or what system it is, just bought it 2 days ago, how can i find out? was gunna check for vacuum leaks next.

plugs and leads are near new, gunna do a major service asap and see what comes of it.

cheers

any gas installers\mechanics around your way to have a look at it,may save time and a bundle of cash on parts not required,dedicated gas is worry as it runs well or crap,,or not at all.

 

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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 7:42 pm 
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it still has fuel lines from the petrol tank, is it as simple as plumbing them up and putting some fresh fuel in to make it dual fuel? or am i being naive? hahaha
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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 8:06 pm 
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stewboy wrote:
it still has fuel lines from the petrol tank, is it as simple as plumbing them up and putting some fresh fuel in to make it dual fuel? or am i being naive? hahaha

your gas guy can tell you, as we dont know what or how its done.a petrol BBQ is no fun.

 

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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 8:08 pm 
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stewboy wrote:
it still has fuel lines from the petrol tank, is it as simple as plumbing them up and putting some fresh fuel in to make it dual fuel? or am i being naive? hahaha


If the EFI type intake system has been removed, no, can't be done so easy. Post up a pic of the engine bay?

Cheers

ToranaGuy

 

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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 8:54 pm 
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nah its all still there, the gas just runs straight into the throttle body by the looks of it, i can see the steel fuel lines from the tank, and the other ones from the fuel rail/ efi system, looks like all it needs is two pieces of fuel hose to join them back up, but i'm wondering if anything internal might be affected by running it on petrol now
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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 10:41 pm 
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It should be fine to run on petrol check the pump and sender unit in the tank as if there is no fuel in the tank they burn out.
you can normally access them from the left side in the boot under the carpet is a round metal plate pump hole is under that
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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 10:52 pm 
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stewboy wrote:
nah its all still there, the gas just runs straight into the throttle body by the looks of it, i can see the steel fuel lines from the tank, and the other ones from the fuel rail/ efi system, looks like all it needs is two pieces of fuel hose to join them back up, but i'm wondering if anything internal might be affected by running it on petrol now

wiring cuts and who knows what and how it was done?gas mechanic will know or should and tell and show you all about,get a tow truck on speed dial as a back up,if it goes WRONG.

 

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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 11:08 pm 
Oompa Loompa
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and for the cost of about $20 a fire extinguisher is cheap peace of mind in any car
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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 11:17 pm 
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andrakis2 wrote:
and for the cost of about $20 a fire extinguisher is cheap peace of mind in any car

depends on the fire type and training,small bottle 5-7 secs may be,if it doesnt re ignite

 

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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Thu Jul 26, 2012 11:38 pm 
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hans hartman wrote:
andrakis2 wrote:
and for the cost of about $20 a fire extinguisher is cheap peace of mind in any car

depends on the fire type and training,small bottle 5-7 secs may be,if it doesnt re ignite


Its still enough to get out. I got a 3kg dry powder from bunnings for $25 for my house and they had the water co2 and dry powders for the same price, the way i see it its better to have and not need than to need and not have

if at all you are unsure of the car or systems take it to a qualified person for a looking over, the other thing you would need to check is the cut offs for the gas, running petrol and gas through a motor, at the same time, is a big no no, not to mention dangerous
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 Post subject: Re: Rough idle, efi 302 on gas. any suggestions on the cause?
Posted: Fri Jul 27, 2012 12:36 am 
Getting Side Ways
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andrakis2 wrote:
hans hartman wrote:
andrakis2 wrote:
and for the cost of about $20 a fire extinguisher is cheap peace of mind in any car

depends on the fire type and training,small bottle 5-7 secs may be,if it doesnt re ignite


Its still enough to get out. I got a 3kg dry powder from bunnings for $25 for my house and they had the water co2 and dry powders for the same price, the way i see it its better to have and not need than to need and not have

if at all you are unsure of the car or systems take it to a qualified person for a looking over, the other thing you would need to check is the cut offs for the gas, running petrol and gas through a motor, at the same time, is a big no no, not to mention dangerous

i have a fire blanket and co2,fire mitts,didnt say it was bad,just might not be enough.dash wiring fire would be hard to get at,engine bay,?

 

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