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EF Fairmont hits a wall at 3.5k revs when cold/randomly. 

 

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 Post subject: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Wed Nov 20, 2013 2:54 pm 
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Ride: 95 Ef Fairmont

Location: Adelaide
SA, Australia

I have a EF.


When cold it feels as if it hits a wall at 3 and a half k revs.
Its like a splutter till it shifts to the next gear.

This only happens on Petrol not LPG.

Running Xr6 Plugs that people suggested work better for Lpg's

Fuel filter has been changed, Made no difference.

Been running BP ultimate fuel for the past month and this situation hasnt gotten any better.
Injector cleaner as been ran through it.

Once the car has warmed up it will freely rev over that. But sometimes it will show symptoms of it even when warmed just not as bad.

Previous owners seemed to mainly run LPG.
Which I dont.

Suggestions would be appreciated.
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Wed Nov 20, 2013 4:36 pm 
Getting Side Ways
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As it happens at a fairly specific rev range it sounds to me like coil pack or leads breakdown. Fairly common issue with the EFs

 

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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Fri Dec 13, 2013 5:28 pm 
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Ride: 95 Ef Fairmont

Location: Adelaide
SA, Australia

Replaced Coil Pack with new Boosch one

replaced Leads with Motorsport Booschs

Break down still occurs at roughly 4k revs
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Fri Dec 13, 2013 6:00 pm 
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anything ignition related would show it more on lpg than petrol, and as its fine on lpg its fuel related.. im thinking tired fuel pump..
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Sat Dec 14, 2013 10:43 pm 
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Ride: 95 Ef Fairmont

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SA, Australia

Would a tired fuel pump run better once its warmed up?
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Sun Dec 22, 2013 11:19 pm 
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SA, Australia

Does anyone have a Link to a Bosch Aftermarket Fuel Pump?

Searching only yields cheaper fuel pumps for around 60 dollars. I thought they were spose to around 150-200?
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Mon Dec 23, 2013 5:42 am 
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Go to Bursons, they are not that expensive.
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Sun Feb 09, 2014 5:15 pm 
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Ride: 95 Ef Fairmont

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SA, Australia

New fuel pump in today No difference idles a little better but still hits that wall occasionally.
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Sun Feb 09, 2014 6:58 pm 
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did you change fuel filter too? fuel pressure reg is a common issue.

cheers
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Sun Feb 09, 2014 8:56 pm 
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SA, Australia

Fuelfilter was done less than 5000 ago.
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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Tue Feb 11, 2014 7:42 am 
Getting Side Ways
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HayHay wrote:
Fuelfilter was done less than 5000 ago.
replace the f*cker anyway. Your chasing a problem. The fuel filter could be blocked full of sh!t from in your tank, or particals if your old fuel pump was on its way out. Or from running the tank low. For the sake for $12 just replace it again and have that piece of mind.

 

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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Tue Feb 11, 2014 7:43 am 
Getting Side Ways
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HayHay wrote:
Fuelfilter was done less than 5000 ago.
replace the f*cker anyway. Your chasing a problem. The fuel filter could be blocked full of sh!t from in your tank, or particals if your old fuel pump was on its way out. Or from running the tank low. For the sake for $12 just replace it again and have that piece of mind.

 

_________________

EL XR6, T5 Speed - Full Factory Fitted Tickford Body Kit, AU Engine, Billet Camtech 845 Cam, J3 Chip, MLS Gasket, Intake, Extractors, High flow cat, 2 1/2in exhaust, K&N Air Filter, 3.45 LSD, - My Pride and Joy

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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Tue Feb 11, 2014 9:43 am 
Getting Side Ways
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+1 fuel-related. Had a similar problem with my son-in-law's EL 'mont. Had been run mainly on LPG but ran rough and wouldn't rev out when he started using petrol. Turned out the injectors had gummed up or partly seized. I would either get them professionally serviced or do it myself. You can get kits from Mr Injector out of the US for cheap, and there are videos on Youtube of how to do it.

Alternatively, upgrade to AU injectors. Used AU injectors should be reasonably cheap. Just make sure they haven't been sitting on a shelf for months, or they could be stuck. Ideally, you want them out of a car that has been running fine in the last few weeks.

 

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 Post subject: Re: EF Fairmont hits a wall at 3.5k revs when cold/randomly.
Posted: Wed Feb 12, 2014 10:10 am 
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Turned out to be a collapsed Cat
Punched through at the moment and came good.
Interesting how it only affected Petrol.

Eh thanks for everyone help.
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