2001 AU ii system cut up itself on the road

kayyan · 21-03-2014, 01:39 PM

Hi, guys
My 2001 AU ii with mileage 350000 has a system cut up problem whcih can't be identified by my electrican and mechanics. Sometimes it suddenly stops on the road and I can restart the car srtaight away after that. The problem happens at low speed such as 30 to 40 km/hr so up to now it hasn't caused any damage, ie car behind me can easily stop and wait for me to restart the car.

My electrican used meter to scan the car and found no relavant code. He guessed from experience that ''crank angle sensor'' is likely to be the problem and changed it on Dec 2013. I drive the car for around 2000 km since then and the problem come back again about 3 weeks ago. Same electrican inspected and scanned the car again and still could not find out what's wrong, ie no relavant code turned up. He cleaned up throttel body as well although it is perfectly clean.

His suggestion is that I keep driving the car till the problem becomes more obvious and than go back to him to scann the eletrical syatem of the car again hoping certain relevant code turnned up this time. He could not repair the car without knowing whcih part/ parts, eg a sensor, is/are mal-functioned.

Nb My mechanics inspected the car before my electrican changed crank angle sensor last Dec and found no relevant mechanical fault re the problem so this time he suggested me to go to the electrican directly.

Anyone has any idea what's wrong with my car? Is this a specific problem of AU falcon? Any help is appreciated. Thanks
Kayyan

Maka · 22-03-2014, 10:25 AM

Hi & welcome to AFF kayyan, check the wiring loom the crank angle sensor plugs into, they are known to have issues over time. Also check the idle control valve on top of the throttle body if it does it at idle, make sure its clean & lubed. Good luck!

cheers, Maka

kayyan · 22-03-2014, 12:55 PM

Thanks Maka for your valuable opinion. Actually, the car did stop itself once when car was idling. So I might get someone to check the idle control valve first as it might be an easier job.

superroo · 23-03-2014, 11:50 PM

Sounds like a similar issue to what Whoosha put up with.

Potential for you:
http://fordforums.com.au/showthread.php?t=11283716
http://fordforums.com.au/showthread.php?t=11284629

Cheers

kayyan · 20-06-2014, 09:50 PM

Hi, below is the latest information of my Falcon's problem:
''the wiring loom the crank angle sensor plugs into'' and ''the idle control valve on top of the throttle body'' have been checked again by my electrician as suggested by Maka. My electrician thought they are fine.

The regular service of the car was performed on early May and my mechanics found that spark plugs were worn out to the extent sometimes they might not function properly to provide enough power to keep the car going, ie two or three of them might stop function at the same time and caused engine stopped. He replaced all six spark plugs and the car runs fine till now although I did not drive the car much due to long overseas holiday. My mechanics knows the ''system cut up'' problem'' since it happened. Now he is sure that the worn out spark plugs is the reason for it.

Does anyone has any other thought of my Falcon's problem? All suggestion are welcomed.
Thanks

Maka · 21-06-2014, 10:02 AM

Hi there, mmm i wonder if the worn plugs damaged the coil? Get a ecu scan & a fuel pressure test done by your mechanic to verify whats wrong with your au. Good luck!

cheers, Maka

kayyan · 25-06-2014, 06:52 PM

Hi Maka
Thanks for your prompt response. Do you mean if there are no problems found after ecu scan and fuel pressure test are done, then you would think that worn plugs and/or coil connecting to the plugs are likely the problems?
Thanks, Kai

Maka · 26-06-2014, 09:17 AM

"He replaced all six spark plugs and the car runs fine till now" Replace the leads if you havent done so yet buddy!

cheers, Maka