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Fuel Regulator and Diagnostics... 


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 Post subject: Fuel Regulator and Diagnostics...
Posted: Fri Feb 24, 2006 7:57 pm 
Stock as a Rock
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Posts: 161

Joined: 13th Jun 2005

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Location: Rockhampton
QLD, Australia

Can someone explain to me what symptoms I could expect with a faulty fuel regulator on a 5.0L V8 ?? Would the car miss slightly on gunning the throttle and then even out ? Seperate from this issue... I was performing the diagnostics tests using an LED and noticed that the digits were shown as 0.5 seconds off ...i.e: the LED was on constantly and blinked off to indicate a I have the wrong terminal or have a ballsed up somewhere...curious... !!
Posted: Fri Feb 24, 2006 11:14 pm 
Getting Side Ways
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Age: 39

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Joined: 7th Nov 2004

Ride: 320kw BA XR8

Location: Adelaide
SA, Australia

A bad fuel reg would typically result in leaning out high in the rev range, not just on tip in throttle. The EEC is programed to stay lean for the first 4 seconds of heavy throttle and this can often cause a miss, especially if something else in the engine is not quite right. I would check spark plugs and leads first (easy), and then set timing and clean the MAF.
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