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BA mk3 dedicated gas issue 

 

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 Post subject: BA mk3 dedicated gas issue
Posted: Sat May 11, 2013 10:52 am 
Parts Gopher
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Ride: Ef fairmont Ghia

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NSW, Australia

Hey guys, last night i picked up an ex taxi ba mk3 for $300, only real problem is that its idling very rough, but once the revs are above 1000rpm, its fine, at first i thought it might have been plugs, but have changed them, and its still happening, any ideas on what else it could be?

Cheers,
Matt

 

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EFII Fairmont (XH00NR) - K & N apollo enclosed pod filter, Megasquirt 2 Ecu controlling fuel, 350 cc injectors flowed out 420cc, Walbro 255lph fuel pump, J3 chip with custom transmittion map, BA XR6 front seats. Turbo setup in the works.
EF Fairmont Turbo

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 Post subject: Re: BA mk3 dedicated gas issue
Posted: Sat May 11, 2013 11:19 pm 
Technical Contributor
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lots of things.

Starting with basics i'd be looking for a vacuum leak (inlet manifold gasket etc). Also get someone suitable qualified (or at the very least someone who knows how) to clean the idle jet and change the LPG filter

failing that its time for compression tests etc - could be a burnt valve
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 Post subject: Re: BA mk3 dedicated gas issue
Posted: Sun May 12, 2013 10:14 am 
Parts Gopher
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Ride: Ef fairmont Ghia

Location: Empire Bay
NSW, Australia

thanks for the info, doesnt sound like a manifold leak, have done a compression test, am going to try replacing the lpg filter and replace coilpacks

 

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EFII Fairmont (XH00NR) - K & N apollo enclosed pod filter, Megasquirt 2 Ecu controlling fuel, 350 cc injectors flowed out 420cc, Walbro 255lph fuel pump, J3 chip with custom transmittion map, BA XR6 front seats. Turbo setup in the works.
EF Fairmont Turbo

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 Post subject: Re: BA mk3 dedicated gas issue
Posted: Mon May 13, 2013 11:37 pm 
Technical Contributor
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WA, Australia

the chances of all 6 coils being knackered is about bugger all. in fact for less than the price of 6 coils you could probably get someone who knows what theyre doing to diagnose it for you.

When you say it doesnt sound like a manifold leak what experience are you basing that on? Inlet manifold gaskets are common as a**holes on these cars and can cause exactly that sympton...
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 Post subject: Re: BA mk3 dedicated gas issue
Posted: Tue Jun 18, 2013 8:38 pm 
Smokin em up
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VIC, Australia

check the stepper motor on top of the gas convertor see if the rod is sticking or not working simple to remove 2 screws, its the black plastic solenoid on top of the convertor also check water flow thru convertor

gassa

 

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 Post subject: Re: BA mk3 dedicated gas issue
Posted: Sat Jun 29, 2013 1:02 am 
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try cleaning the throttle body with carby cleaner and clean cloth, make sure you open and close butterfly while spraying. also the oxygen censor (i think it's called) should be on the induction inlet near the air cleaner, take of two screws and spray with carb cleaner.
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