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F-150 No power

Tiny
ALLEN62
  • MEMBER
  • 1999 FORD F-150
  • 6 CYL
  • AUTOMATIC
Car was running fine Thursday night. Started to head to my brothers house Friday and lost power. Disconnected cats from manifolds still had no power
Sunday, July 10th, 2011 AT 2:39 PM

17 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light and when was last tune-up?

Check and test the mass airflow and throttle position sensors-
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Sunday, July 10th, 2011 AT 6:36 PM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
No there are no codes showing at the present time. Only means of transportation. Mechanic cant even figure it out
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Monday, July 11th, 2011 AT 10:43 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You sure the brakes are not locking up and transmission is not slipping? If both okay -check the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.
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Monday, July 11th, 2011 AT 10:47 PM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
No there are no codes showing up. The mechanics cant even figure it out for some reason.
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Monday, July 11th, 2011 AT 10:48 PM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
No codes showing up on computor. Already did tuneup bout 5 mths ago. Brakes not sticking or tranny slipping. Already know cats are bad disconnected them.
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Tuesday, July 12th, 2011 AT 12:22 PM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
Well just got back from mechanic. Tried hoking up scanner again and now scanner keeps shutting down. Need help desperately
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Tuesday, July 12th, 2011 AT 4:16 PM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
Just got my 99 F150 back again today. It wont even start. Really tries to. U can smell gas bad while ur trying to start it. Mechanic said that he had it narrowed down to the cylinder head temp sencor or the ECM. Where is the cylinder head temp sencor located at on this 99 F150 4.6 automatic 2 WD.
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Tuesday, July 19th, 2011 AT 11:39 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Pour fuel in the throttle body does it start?
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Wednesday, July 20th, 2011 AT 3:41 AM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
I believe that its a multiport injected. I dont believe it poor fuel. Been getting fuel from only place for years. It wont start at all. U can really smell fuel when u try to start it. It keeps flooding its self out. Very good possibility its the ECM
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Wednesday, July 20th, 2011 AT 12:12 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Take the air filter off and pour fuel in the throttle body. If it fires you no the engines good and its a fuel issue.I can help you but youll need to do as I ask. If this engine starts leaking fuel your are looking for a engine fire.
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Wednesday, July 20th, 2011 AT 11:40 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
FROM WHAT I HAVE READ, THIS PUPPY WILL RUN!

JUST NOT VERY WELL, AND WE SMELL FUEL. LIKE TOO MUCH FUEL. LIKE DROWNING IN FUEL.

HADN'T SEEN NOTHING ABOUT WHAT FUEL PRESSURE ACTUALLY IS

CAN YOU TEST THAT, AND LET US KNOW?

MAYBE IT'S TOO HIGH OVERWHELMING THE INJECTORS?

WE'RE HERE TO TRY TO HELP

KEEP US INFORMED

THE MEDIC
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Thursday, July 21st, 2011 AT 12:06 AM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
I think it is a MFI
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Thursday, July 21st, 2011 AT 10:54 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Good luck all im done
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Thursday, July 21st, 2011 AT 4:43 PM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
I sprayed fuel into the throttle body. It does try to start. But thats the way it has been doing. Got an ECM for the thing. Gonna take it to the ford dealership tomorrow. I am really sorry if I did not understand what u was talking about candiman
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Saturday, July 23rd, 2011 AT 12:15 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
That means it is a fuel issue. Get me a fuel pressure reading.
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Saturday, July 23rd, 2011 AT 3:22 PM
Tiny
ALLEN62
  • MEMBER
  • 10 POSTS
If I am looking in the right place on the drivers side rail. Theres a place that looks like a valve stem. I opened that with the key on and just a squirt cam out. Gonna unhook the new filter again in the morning and see what happens like that. Already put a new fuel pump and filter on. Hard to beleive could be bad
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Sunday, July 24th, 2011 AT 3:27 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
Cadieman SORTA WANTS SOME NUMBERS, LIKE WITH A GAUGE INSTALLED, TURN THE KEY TO ON. READ NUMBER!

MINE IS SORTA PRIMITIVE!

I MADE IT FOR OIL PRESSURE TESTS

ADD A FITTING, AND "PRESTO"!

INSTANT "NELSOMATIC DUEL PURPOSE GAUGE ASSEMBLY". Patent is not pending

AND GET THIS. THE BEST PART. IT WORKS FOR BOTH. WHAT A DEAL!

THE MEDIC
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Sunday, July 24th, 2011 AT 3:49 AM

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