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Revs drop down when braking 

 

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 Post subject: Revs drop down when braking
Posted: Thu Jun 06, 2013 7:17 pm 
Stock as a Rock
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Age: 31

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Joined: 10th Jan 2007

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Ride: Mustang

Location: Newcastle
NSW, Australia

Hi guys, having a strange issue with my series 2 au falcon. Basically whats happening is under heavy breaking and even normal breaking, just before the car stops the revs will drop down bellow idle to the point is feels like its about to stall, but it never does. Then the revs pick back up and it will idle normal. Other than that the car runs fine, idles normal, no loss of power or any power surge. Any ideas what could be the problem? Cheers
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 Post subject: Re: Revs drop down when braking
Posted: Fri Jun 07, 2013 11:25 am 
Getting Side Ways
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Age: 64

Posts: 3452

Joined: 11th Jan 2009

Ride: BA Falcon XT

Location: Smithfield
NSW, Australia

Could be the TPS? I would also check to see if the inlet manifold is loose or, if you have any vacuum leaks.

The TPS is rather expensive from Ford but maybe you could find one on Ebay? They are different from the series I also.
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 Post subject: Re: Revs drop down when braking
Posted: Sun Jun 09, 2013 6:00 pm 
Getting Side Ways
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Ride: el wagon

Location: melbourne
VIC, Australia

Small crack in brake booster???
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 Post subject: Re: Revs drop down when braking
Posted: Mon Jun 10, 2013 5:21 pm 
Oompa Loompa
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Age: 36

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Joined: 15th May 2013

Ride: AU LPG falcon

Location: Werribee
VIC, Australia

Does it feel like the transmission is still trying to drive? Could be the torque converter not disengaging from lock up. Has the transmission been serviced regularly?
Try putting it into neutral then braking and see if the revs still drop down.

Cheers Mick
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 Post subject: Re: Revs drop down when braking
Posted: Wed Jun 12, 2013 9:06 pm 
Smokin em up
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Age: 26

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Joined: 27th Jun 2007

Location: Melbourne
VIC, Australia

MY EL Fairmont Ghia does the same thing, only when at operating temp though.

Driving along, in D.

Come to stop at intersection, it goes to downshift to first gear, revs drop to 500 RPM, car shakes like it is going to stall, revs up to 1500 RPM and shifts down.
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