Any body have some suggestions as to why my ford mustang gt with 5.0 engine, surpentine belts, 4barrel, 5speed noses over like someone turned off the ignition when I get on it really hard. It revs up nice and then just nothing. Any help would be appreciated. Thanks.
I would start with a fresh fuel filter. If that doesn't do it, check the fuel pressure and delivery to make sure the fuel pump is not going south. IIRC, the Ford Duraspark ignition was used on there if still stock. The modules had a habit of getting weak just before dying. Once you make sure it is getting fuel, the ignition has to be strong. The Duraspark would usually not show it's problems until it got hot. I don't know of any test other than the one many Ford techs used in the day to place a 200 watt lamp as close to it as possible to heat it and see if it failed. The ignition spark should be a nice bright blue over a 1/2" gap. If it is red or orange, the ignition system won't do the job. You can buy a spark tester for a few bucks at most parts stores. Ideally, a good tech would check it with a scope. Not everyone knows how to read a scope to spot problems. Not every shop even has a scope these days.
Lugnut
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