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F250 351 Windsor idleing rough, overfuelling etc 

 

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 Post subject: F250 351 Windsor idleing rough, overfuelling etc
Posted: Sun Jun 27, 2010 10:04 am 
Tyre Shredder
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Age: 27

Posts: 326

Joined: 3rd Nov 2009

Ride: AUII XR8 Pursuit & EF XR6

Location: Albion Park
NSW, Australia

Wasnt sure where to post this but the old man just bought a 88 F250 with a 351 Windsor in it. When first started in the morning it runs fine, idles nice but once up to operating temperature it idles rough, starves for fuel. Fuel tank has been cleaned and fresh fuel put in, injectors clean, would have to be electronic??

What could be wrong?? Not sure so I thought id ask here. Cheers in advance.

 

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 Post subject: Re: F250 351 Windsor idleing rough, overfuelling etc
Posted: Sun Jun 27, 2010 11:28 am 
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

Have you changed the fuel flter? Are the pumps ok?
Could be ECT sensor or HEGO sensor causing this too.
The HEGO is halfway down the car on these.
Do a self test.
Doesn't have to be electronic though. Are all the hoses for the emission controls intact?
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 Post subject: Re: F250 351 Windsor idleing rough, overfuelling etc
Posted: Sun Jun 27, 2010 10:07 pm 
Getting Side Ways
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Age: 64

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Joined: 7th Nov 2004

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Power: 482 rwkw

Location: Penrith
NSW, Australia

Is the MAP sensor connected ???

 

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 Post subject: Re: F250 351 Windsor idleing rough, overfuelling etc
Posted: Sun Jun 27, 2010 10:25 pm 
EFI Guru
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Age: 52

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WA, Australia

No MAP would make it run extremely rich....there'd be black smoke.
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