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2006 BF Fairlane 5.4 24 valve missing 

 

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 Post subject: 2006 BF Fairlane 5.4 24 valve missing
Posted: Wed Mar 12, 2014 1:06 pm 
Fordmods Newbie
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Posts: 1

Joined: 12th Mar 2014

Ride: BF fairlane ghia 5.4

Location: Melton
VIC, Australia

My 5.4 LTR 24 valve fairlane has developed a serious miss after braking heavily.
I found leaking o rings on number 5 injector so replaced o rings,
Number 7 injector sluggish so replaced it.

Still missing, so I checked coil packs, no spark at number 7, plugged it into number 6 and got spark...
Ran hot wires direct from leads at number 7 still no spark...
Put multi meter on leads, 13.8v on the constant and varying between 7 and 11 v on the pulse....

Confused why I still have no spark on 7 pls help
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 Post subject: Re: 2006 BF Fairlane 5.4 24 valve missing
Posted: Sat Mar 15, 2014 10:09 pm 
EFI Guru
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Age: 52

Posts: 4289

Joined: 5th Nov 2004

Gallery: 28 images

Ride: 351 Vogue,XH 5.0,'17 5.0 Stang

Location: Perth
WA, Australia

Sounds like it could be a damaged ignition driver in the PCM for #7. Interesting how heavy braking can cause this and also interesting that you also have a problem with #7 injector. Is there something wrong with the harness that reared it's when heavy braking perhaps? Check that #7 wires for both injector and ign are not melted and shorting partially or fully somewhere?
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 Post subject: Re: 2006 BF Fairlane 5.4 24 valve missing
Posted: Sat Mar 29, 2014 6:28 pm 
Smokin em up
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Posts: 215

Joined: 13th Apr 2009

Ride: BA 3VM

Location: Lwr Blue Mountains (Sydney)
NSW, Australia

How long since the plugs were changed?
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