my truck wont start or idle by itself

5

Asked by Mar 04, 2016 at 03:14 PM about the 2004 Ford F-150 Lariat Ext. Cab SB 4WD

Question type: Maintenance & Repair

i have a 2004 ford f150 5.4l lariat triton it turns over but wont start and if i
spray starter fluid in it ; it will start but i gotta stay on the gas it wont idle alone
but what i dont get is why wont it start and idle without the fluid

7 Answers

19,820

First you should check air filter and replace if necessary, change fuel filter if problem still persists get a fuel pressure test done.

19,820

Also add some fuel injector cleaner to gas tank will help clean dirty injectors if that is your problem.

7,395

Check fuel pressure at rail, ur not getting fuel

370

I bet you its the mass airflow sensor. Try unplugging it and starting, if it starts theres ur problem. Dont run it long unplug or it will foul your plugs

370

Its beats paying for a fuel pump, also replace fuel filter, may have restriction inside. Ofcoarse if it not the mass airflow sensor. My truck shut off while driving, thought fuel pump went out, but could hear if cycling for a few seconds. Turns out it was a 30 sensor... Good luck, 5.4 3v is the.worst engine ford has ever put out.. Im still having issues I can't figure out:/

1)Check fuel pressure, ok 2)X fuel filter,ok 3) X fuel pump!

835

You are giving it a super high octane shot with the fluid.ok now it is running.but you have to stay in to keep it.let's see you had to spray the carb/you have to stay in the truck to keep it running which is your foot helping tne carb.I wonder what is wrong. Carb carb carb carb carb

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