i have a 1986 ford bronco with a 5.8L i just got done replacing the timing gears and timing chain after putting it all back together i started it up and it ran great it ran for about 10 minutes with no prob but i noticed that when it warms up the oil pressure drops and it starts running rough i replaced timing chain and timing gears spark plugs and sparkplug wires plus fuel filter and it still runs rough and tries to stall out when it warms up can some one please tell me what could be wrong with it

 

Is it fuel injected? If so pull codes and report those numbers to us. Pull all three areas please KOEO, CM, KOER.
Possibilities include not a 195 degree thermostat, ECT, ACT, O2 but get the codes before you start throwing parts at it.

WELCOME to FTE, everyone will do their best to provide you with accurate information.

 

An 86' 351W would be carbed'. Check the timing with a timing light, the carb may need to be tuned/adjusted...(curb idle to low??)