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XF GHIA king revving @ idle & accelerating by itself 

 

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 Post subject: XF GHIA king revving @ idle & accelerating by itself
Posted: Mon May 22, 2006 9:21 pm 
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Hey Guys,

My XF GHIA hasn't been driven for 3 months, yesterday I charged the battery up & kicked it in the guts, she started up fine & idle'd for a few minutes, I went inside to get my wallet so I could go put some gas in it & it king revved as hard as it could, I ran out & switched it off, had a quick look at the accelerator cable & it seemed ok so I started it up again & started to drive to the servo & as I was crawling over a speed hump it accelerated to 1/4 throttle by itself (the accelerator pedal moved) but backed off to idle when I pressed the brake & kept doing this.. I headed home real quick & put it into Park & idled it for a few seconds & it revved as hard as it could again. It was getting dark so I just left it.

I was going to lube the Accelerator Cable tonight & see if that helped but I've got a bad Cold today so didn't feel like going outside after work.

Any idea's of what else it could be?

 

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Posted: Mon May 22, 2006 9:27 pm 
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does it have crusise control and could that be playing up?

 

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Posted: Mon May 22, 2006 9:34 pm 
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mitch_anderson wrote:
does it have crusise control and could that be playing up?

I was thinking that, it does have Cruise but it's never worked.. But cruise wouldn't actually pull the Accelerator Cable would it? I've only used cruise in E Series onwards..

 

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Posted: Mon May 22, 2006 9:59 pm 
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e-series uses vacum to pull on the accelerator i know that
put cruise on and u can feel the pedal move...

 

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Posted: Mon May 22, 2006 10:08 pm 
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mitch_anderson wrote:
e-series uses vacum to pull on the accelerator i know that
put cruise on and u can feel the pedal move...

Hmm, interesting.. That could explain why its accelerating by itself, something to do with the Cruise activating.. But doesn't really explain why its revving up @ idle..

 

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Posted: Mon May 22, 2006 10:22 pm 
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the cruise controll is worked by cable on the trottle Body, so yeah, you would feel the pedal being 'pulled' down as if you was pushing the pedal yourself..

thats the onlyt hing i can think of that would cause this problem for you...

hope that helps

:)

 

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Posted: Mon May 22, 2006 10:30 pm 
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zk wrote:
the cruise controll is worked by cable on the trottle Body, so yeah, you would feel the pedal being 'pulled' down as if you was pushing the pedal yourself..

thats the onlyt hing i can think of that would cause this problem for you...

hope that helps

:)

Sweet, when I get over this cold I'll either disconnect the Cruise Cable or take it for a drive & turn Cruise off & see if that helps.

 

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Posted: Mon May 22, 2006 10:40 pm 
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cruise is not supposed to activate under 50kmh as far as I am aware but maybe having the battery slow discharge over the last few months has "confused it". I would try diconnecting the battery for a couple of minutes to reset the ecu etc and see if that works perhaps

 

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Posted: Mon May 22, 2006 10:42 pm 
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iv managed to get the cruise to work for me at 40km/hr in both my zl's, and mates zl's too...

group fault maybe?! lol...

anyhow

 

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Posted: Mon May 22, 2006 11:01 pm 
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jim3964 wrote:
cruise is not supposed to activate under 50kmh

Yeah I know that, but I guess if somethings wrong with it, it might be able to activate..
jim3964 wrote:
maybe having the battery slow discharge over the last few months has "confused it". I would try diconnecting the battery for a couple of minutes to reset the ecu etc and see if that works perhaps

The ECU would of reset when I took the Battery out to recharge, but I'll try resetting it again, can't hurt..

 

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Posted: Tue May 23, 2006 10:17 pm 
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ahh accelerator sticking?
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Posted: Tue May 23, 2006 10:34 pm 
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nv.shaggys.xf wrote:
ahh accelerator sticking?



He said it was idling dude - unless the boogyman punched the pedal i dont think so :P
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Posted: Tue May 23, 2006 11:48 pm 
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Timing might be out causing a warm idle overrun condition? whenever mine was warm If I put it into neutral it would rev to around 3000rpm. ISC could also be sticking. Can't rmember if XF's had an ISC though.
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Posted: Wed May 24, 2006 8:45 am 
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nv.shaggys.xf wrote:
ahh accelerator sticking?

Nah I don't think it is, I've lubed the Accelerator Cable, if it was sticking it wouldn't cut out when I put my foot on the Brake, I'm convinced its the Cruise Control..

 

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Posted: Wed May 24, 2006 8:46 am 
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xcabbi wrote:
Timing might be out causing a warm idle overrun condition? whenever mine was warm If I put it into neutral it would rev to around 3000rpm. ISC could also be sticking. Can't rmember if XF's had an ISC though.

Don't think so, because it can idle fine for 2-3 minutes then it rev's it guts off..

 

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