1997 f150 cranks but won't start
09-09-2009, 02:11 PM
#1
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1997 f150 cranks but won't start
my f-150 quit running I have spark and fuel in the rails the engine a 4.6 v/8 will run on either spray but won't start on the pcm it's own I think the injectors are not working how and what should i test is the pcm not working? help
09-09-2009, 04:49 PM
#2
Senior Member
Is there any CEL activity? Not sure of the 4.6, on the 5.0 the cam position sensor is what informs the PCM of the injector timing. Would think the same of the 4.6. Don't have any secrets as to how to separate input error or output failure of the PCM.