My ford 84 mustang,5.0, 4barrel, 5speed, noses over under acceleration?

On Fri, 27 Jun 2008 09:34:54 -0700 (PDT),
[email protected] wrote:

>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