86 Crown Victoria 5.0 only runs for 30 minutes before dying.

Asked by Jun 26, 2017 at 03:57 PM about the 1986 Ford LTD Crown Victoria 2 Dr Coupe

Question type: Maintenance & Repair

I have a 1986 Ford LTD Crown Victoria with
a fuel injected 5.0 302. It had sat for an
unknown amount of time prior to purchase
in Feb. 2016. This car was love at first sight
and I had to have it. Because it sat i
replaced the cap, rotor, wires, plugs, and fuel
filter. Rough operation triggered the
replacing of the MAP sensor. A no spark
problem triggered replacing ignition control
module, coil, and PiP sensor. Then a dying
battery triggered replacing battery and
alternator. No fuel issue triggered replacing
of fuel pump. Now it runs like a champ...for
30 minutes. It runs for about 30 minutes
while driving or idles for 45 minutes. Then i
have to let it sit for a couple hours before i
can drive it again. Thus far I've replaced the
fuel pressure regulator, throttle positioning
sensor, Idle Air Control valve, and engine
coolant temperature sensors. This is the
most mind boggling  I have come across
and need help!!! Please!!!

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