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XF Not Being Nice 

 

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 Post subject: XF Not Being Nice
Posted: Fri Nov 11, 2005 6:02 pm 
Getting Side Ways
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Location: Sydney
NSW, Australia

My mum has just bought an XF for like $500. Its the 250 carby donk with a 5spd behind it. Every time you give it a bit to much gas, it looses power, backfires through the carby and then takes off. Yes, sounds really funny going up the road through all 5 gears but It loosing alot of power because of it. I have rebuilt the carby with a carby kit and set it all to spec. Still does it. Im thinking mabey head gasket next but that dosent make sense. It idles beautifully. I hooked a tach up to it and it idles perffectly with like a 20 - 30 rpm difference here and there. Help Please!! Im slowly loosing hair!!
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Posted: Fri Nov 11, 2005 6:07 pm 
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have you checked the timing? if so what is it?

-mitch

 

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Posted: Fri Nov 11, 2005 6:08 pm 
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play with the mixtures on the carby dude

 

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Posted: Fri Nov 11, 2005 6:26 pm 
Getting Side Ways
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I didnt clear the timing marks when I checked it but it was lighting up when the mark was in the middle of the crank marks. I would say about 2 - 3 degree and where is the mixture screw on the webbers? I cant find it any where!!
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Posted: Fri Nov 11, 2005 7:53 pm 
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my coil in my ute did that.
replaced it, and now it goes great.

 

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Posted: Fri Nov 11, 2005 8:48 pm 
Getting Side Ways
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Ok, I will check the coil later

Thanks For That
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Posted: Sat Nov 12, 2005 3:23 pm 
Oompa Loompa
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if is backfiring through the carby sounds like the float level or mixture in correct , or check the leads one by one for resitance 6000 ohms per 300 mm of lead and make sure u have continuity through the coil , and maybe check for inlet manifold leaks using aerostart and spraying it along the manifold
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Posted: Sun Nov 13, 2005 12:19 am 
Getting Side Ways
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I did think float level but when I checked it, it was all good. 7mm level and 14mm travel. Yet to check mixture but will get a coil soon!
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Posted: Mon Nov 14, 2005 12:13 pm 
Parts Gopher
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i had that exact same problem in my auto xf, and it came down to some crap in the fuel lines... i replaced both filter elements and flushed the lines as best i could, now it runs ok...

 

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Posted: Mon Nov 14, 2005 6:16 pm 
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As a rule of thumb. 99% of all fuel problems can be traced to the electrical system.

XFSteve

 

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Posted: Fri Nov 18, 2005 7:08 pm 
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Just a stab in the dark here but the fuel your puttin' in isn't an Ethenol blend is it?
I've had some real dramas with that fuel in a couple of cars

 

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Posted: Sun Nov 20, 2005 11:52 pm 
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ate it will be the timing for sure
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Posted: Sun Nov 20, 2005 11:54 pm 
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also mate test the plugs and leads good chance they are out of spec too
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