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09-03-2012, 08:16 PM
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FF.Com.Au Hardcore
Join Date: May 2007
Location: Perth
Posts: 585
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My AU3 Fairmont I6 has developed a missfire when anymore than a quarter throttle is applied. It just doesn't rev smoothly and hesitates right through the rev range. When cruising it drives perfectly.
I've changed the coil pack, spark plugs and leads, fuel filter, 02 sensor and checked the t/b and intake to make sure it was clean and the problem is still present. Does anyone know what could be causing the problem? Thanks
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Current: Built R32 GTR 520Hp ATW AU3 Fairmont I6 Whiteline swaybars, FPV Typhoon Rims, Superlows, Custom Intake Piping, Modified BA XR8 Airbox, Big Stereo Past: 2001 AU2 XR8 220 Manual 1/4 Mile: 13.8 @ 100MPH (161km/h) Ford Falcon AU2 V8 Auto 1/4 Mile: 13.0 @ 107MPH (172km/h) |
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09-03-2012, 09:02 PM
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FF.Com.Au Hardcore
Join Date: Jan 2010
Location: South Bowenfels NSW
Posts: 687
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Map sensor could cause this. Have you tested it
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09-03-2012, 09:33 PM
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Falcon Unbelievable!
Join Date: Jul 2005
Location: Uncle Henry's Garage
Posts: 382
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Was it ACA brand coil pack? I had a similar issue to this with a faulty ACA brand coil pack. Every time you had to get on the accelerator quickly it'd hesitate, apply smoothy and slowly no probs. Changed it to a Bosch brand no problems now running fantastic.
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10-03-2012, 05:34 PM
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FF.Com.Au Hardcore
Join Date: May 2007
Location: Perth
Posts: 585
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Quote:
Quote:
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Current: Built R32 GTR 520Hp ATW AU3 Fairmont I6 Whiteline swaybars, FPV Typhoon Rims, Superlows, Custom Intake Piping, Modified BA XR8 Airbox, Big Stereo Past: 2001 AU2 XR8 220 Manual 1/4 Mile: 13.8 @ 100MPH (161km/h) Ford Falcon AU2 V8 Auto 1/4 Mile: 13.0 @ 107MPH (172km/h) |
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11-03-2012, 12:16 AM
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Bugger!
Join Date: Jul 2011
Location: Albany, WA
Posts: 3,307
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Any smoke at all?
Sounds like a fueling problem, perhaps the TPS, fuel reg, or a weak pump. The TPS can be checked easily with a voltmeter, just have the key on and measure the voltage output on the orange/black wire (I think - if not it'll be the green/black one). Should range between 0.7 to 5v. A couple of points either way is fine, but should change smoothly as you open the throttle. Fuel reg or pump - requires a pressure tester inserted into the line.
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Whoops, there goes another factory setup! Chop and change - butchering cars since 1990 
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Yep! Another AU I6 Miss Fire Thread
Linear Mode
