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14-01-2012, 02:30 PM
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#1 | ||
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66 Mustang
Join Date: Jan 2009
Location: Townsville, QLD
Posts: 206
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My AU ute (6cyl) is hard to start.
I thought it was the fuel pump, so replaced that and the filter and it is better but still a little hard to start and some times coughs for a few seconds before starts idling properly. If I am sitting at a set of lights, it will also have a misfire every say 10 or 20 seconds, it's wierd. Any thoughts??? |
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14-01-2012, 03:38 PM
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#2 | ||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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inlet manifold leak is the most likely culprit
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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14-01-2012, 04:08 PM
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#3 | ||
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66 Mustang
Join Date: Jan 2009
Location: Townsville, QLD
Posts: 206
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Pull it off, replace the gasket and refit?
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14-01-2012, 05:16 PM
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#4 | ||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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there are 3 gaskets that could leak the one on the block the on joining the 2 halfs ( lees likely) and the throtle body gasket . with the engine running spray some soapy water around from a trigger bottle and you will hear a change in engine note when to finds the leak
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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15-01-2012, 06:08 AM
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#5 | ||
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FF.Com.Au Hardcore
Join Date: Dec 2009
Posts: 905
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You could always check the main bolts from the inlet manifold to head are tight . I always re torque them every oil change .
How old are the spark plugs as well ? IM guessing Gasket leak & Plugs
__________________
1998 AU VCT Ghia - Stock as a rock - Wifes car 1991 Toyota Soarer TT - 11.72 @ 116.7mph 2004 Ford Escape XLT V6 - Family Ride . |
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15-01-2012, 12:09 PM
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#6 | ||
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Au Falcon = Mr Reliable
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
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Check for quality of spark ie: spark plugs & leads. Maybe coilpack, check both primary and secondary resistance values.
__________________
Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792 Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007) |
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21-01-2012, 08:49 PM
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#7 | ||
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Regular Member
Join Date: Jan 2007
Location: The Shire
Posts: 89
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Try this....
Before you start the car switch it to reds then off, let the fuel pump run its prime cycle before switching off the reds. Now do this five times and it should start first time if its dropping rail pressure. The stumble after starting would be the lack of pressure at the injector rail and the lack of fuel, fuel pump trying to catch up. That miss could also be a faulty injector and not giving off a correct spray pattern at idle causing an incorrect or poor burn pattern. just a thought, I also own an AU so trouble shooting is a very regular occurrence  . Thank you Mazda 121 metro 
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AU Hard to start and slight misfire at idle
Linear Mode
