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26-06-2013, 10:12 PM
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AU II XR8
Join Date: Mar 2006
Location: melbourne
Posts: 978
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A rather strange problem I have with the XR8 is the throttle sticking. Once the car has either warmed up or given a boot ful, the throttle sticks once I have released the pedal. When I put my foot down, I need to use a little force to get it unstuck, which can cause quite a rough ride!
A soon as I shut the engine down and it stops winding over, the throttle frees up and is back to normal! I removed the throttle cable and cruise control cable an tried moving the throttle arm by hand and had the same problem until the engine shut down. I read another thread earlier about the same problem and the harmonic balancer was mentioned, so changed that as well, but no success. Iv given the throttle body a clean and a lube as well. And as a reminder, it's perfectly fine when the engine is cold or has been sitting a little while. None of the sensors on the throttle body are causing it to stick either as I had the removed when the engine was running. I'm at the point of pulling the throttle body of and pulling it apart for a good clean. If that doesn't fix it then who knows?!
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AU XR8 II ute XD FAIRMONT GHIA 302 XA FAIRMONT 302 TOPLOADER |
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26-06-2013, 10:13 PM
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not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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Loose vacuum hose anywhere?
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RAM 1500
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26-06-2013, 10:28 PM
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AU II XR8
Join Date: Mar 2006
Location: melbourne
Posts: 978
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Not that I could see. What's the reason?
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AU XR8 II ute XD FAIRMONT GHIA 302 XA FAIRMONT 302 TOPLOADER |
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26-06-2013, 10:48 PM
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www.sctflashtuning.com
Join Date: Jan 2005
Posts: 3,142
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Common problem , screw the throttle stop screw in half a turn and problem solved
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Australia's No1 Ford Enhancement Specialist 103 Northgate Drive Thomastown VIC 3074 Phone: 03 9464 5100 Fax: 03 9464 5166 |
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26-06-2013, 10:50 PM
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AU II XR8
Join Date: Mar 2006
Location: melbourne
Posts: 978
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Thank you! Will try it tomorrow.
Ill also keep an eye out for a vac problem b2tf, thanks.
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04-07-2013, 05:48 PM
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AU II XR8
Join Date: Mar 2006
Location: melbourne
Posts: 978
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So after winding the idle screw in a little, it made the problem a little better, but it was still there enough to **** me off, and after a little thought, I came to the conclusion that it must be an air pressure sort of thing, causing the butterfly valve closed!
So then I wet searching for a loose vacuum hose thanks to b2tf! Turned out that the PCV hose was half hanging out. Something I wouldn't have thought would cause such a problem, but anyway, thankfully it's gone!
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08-07-2013, 11:41 AM
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not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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Glad you solved it. I've had it happen to me before with the last ute and I found the hose hanging out of the back of the manifold which is a real bugger to get back in, hence my thinking it may have been something along those lines.
Now that you've fixed it, I'll give you $3k for the car 
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XR8 throttle sticking - only when engine is running
Linear Mode
