Question about 2004 Ford F150

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Ford F150 2004 SLT 4.6 Engine rattles, can't make it idle, knocking hard, 3 coils not receiving voltage (on the same driver side), test shows 2 oxigen sensors defective, giving a very lean mixture, Truck had been recover from repo and been parked for a year, keys were made by locksmith not original, Could it be a computer mess up before repo?

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  • Jorge Pereyra Dec 29, 2010

    Did you read through the multiple symptoms?.

    Thanks for effort anyway

  • Jorge Pereyra Dec 29, 2010

    To start the engine I have to pump gas and keep it pushing acelerator. Make very noisy (like a diesel engine) and had almost no power. It will not idle, If I drive it after a couple blocks ( always keeping foot on acelerator) may get a cruising speed of 35-40 mph after a lot of backfire when I give gas.

  • Jorge Pereyra Dec 29, 2010

    You have been very very helpful. Thanks for thoughtful advise, you know what your talking about. How can I find out if it is a "Cam phaser"?. Will it be better off replacing engine. Where can I buy a good shop/service manual?
    Thanks again

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I will try to help. I can answer your question about a mess up before the Repo. There is a problem with a part called a "Cam Phaser" and a problem with spark plugs with this year model and several more year models.

You are going to have to replace the parts you know are bad, like the O2s and fix the electric feeds to the coils. If the former owner thought the "Cam Phasers or Plugs" were bad he or she may have let the truck go rather than repair it.

The good news is that by fixing the 3 coil wires and replacing the O2s you may only need a gasket and a few sensors and be good to go.

1. Put in O2 sensors 2. Fix electric problems to coils, check pin connectors for ECU to the drivers bank of coils. You need to find if wires are dead coming out the ECU. 3. Check Cam sensor connection for Drivers bank. This tells ECU when to fire plugs. 4.The idle problem will improve with 8 cylinders firing, then check for Intake gasket leaks with can of choke cleaner around seams while engine runs. A change in RPM indicates a leak.

At any point after the engine starts running better, clear the computer. Let onboard system rediagnose problems.

Depending on how much work you want to do, you may want to pull the Intake and check your plugs. Ford heads coughed up plugs and the knock you hear may be loose plugs. Oil up the plugs and let them soak 8 hours and then remove from engine. They are unlike any plugs you have seen.

You can use the reply feature for more info. I hope I have been very helpful for you. You may want to check out the F150 Forum online, or Browser search F150 sparkplug recall, or similar for "Cam Phasers". I will give you and idea of potential problems I mentioned.

Posted on Dec 29, 2010

  • fordexpert Dec 29, 2010

    The "Cam Phasers" are parts that advance the timing of the valves for each side of the engine . The truck will sound like a diesel below 2000RPM and then the noise will let up at higher RPMs. With a cheater tool (check with Snapon, or Mac) you can replace the Cam Phasers through the Valve cover openings. Without the Cheater, the front of the motor down to the basic block must be removed. With Cheater about $800 to $1200, without Cheater about $1800 to $2600. The "Cam Phasers" are ridiculously priced from $350 to $500 each.

    I would check out Haynes manuals versus Chiltons at Autozone, etc. You might have some luck with a public library if you live in a major city. Online, you can get many diagrams free.
    The inside of this engine looks like you need to be an Aerospace Engineer to understand it.

    Thanks for reply-Fordexpert

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The keys won't make a difference, yes that sounds like a computer problem and i would take to dealership to have reprogrammed. also try disconnecting battery to reset computer and clear codes if it runs ok for a bit u could have a engine to chassis ground wire problem

Posted on Dec 29, 2010

  • christopher hogue Dec 30, 2010

    you could try replacing the cam sensor. its a start but kinda unlikely, sumthing as dumb as a ground wire broke can throw everything off, cam sensors and crank sensors, o2 sensors can also cause similar problems but not that many all at once, wish i could help more but only so much i can do online

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183 Fuel system at idle rich adaptive limit, system lean (Rear Side).
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185 MAF sensor input voltage is less than expected, in range.
186 Closed loop injector pulse width longer than expected.
187 Closed loop injector pulse width shorter than expected.
188 Fuel system at part throttle lean adaptive limit, system rich (Front Side).
189 Fuel system at part throttle rich adaptive limit, system lean (Front Side).
193 Flexible Fuel sensor circuit failure.
211 PIP circuit failure.
212 Loss of tachometer/IDM input.
213 EEC SPOUT circuit open.
214 CID circuit failure.
215 PCM detected coil 1 primary circuit failure.
216 PCM detected coil 2 primary circuit failure.
217 PCM detected coil 3 primary circuit failure.
218 Loss of ignition diagnostic monitor signal-left side.
219 Spark timing defaulted to 10 degrees, spark output circuit open.
221 Spark timing error.
222 Loss of ignition diagnostic monitor signal-right side.
223 Loss of dual plug inhibit control.
224 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
225 Knock not sensed during dynamic response test KOER.
226 Ignition diagnostic monitor signal not received.
232 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
238 PCM detected coil 4 primary circuit failure.
241 Ignition control module to PCM ignition diagnostic monitor pulse width transmission error.
244 Cylinder Identification circuit fault present when cylinder balance test requested.
311 Secondary air injection system inoperative during KOER self-test (bank #1).
312 Secondary air injection system misdirected during KOER self-test.
313 Secondary air injection system not bypassed during KOER self-test.
314 Secondary air injection system inoperative during KOER self-test (bank #2)
326 PFE sensor circuit voltage lower than expected.
327 PFE sensor circuit voltage below Self-Test minimum.
328 Exhaust gas recirculation valve position sensor closed voltage lower than expected.
332 Insufficient EGR flow.
334 Exhaust gas recirculation valve position sensor closed voltage higher than expected.
335 PFE sensor circuit voltage out of Self-Test range.
336 PFE sensor circuit voltage higher than expected.
337 PFE sensor circuit voltage above Self-Test maximum.
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339 Engine coolant temperature higher than expected (thermostat test).
341 Octane adjust service pin open.
381 Frequent A/C clutch cycling.
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412 Cannot control RPM during KOER high RPM check.
415 Idle Air Control system at maximum adaptive lower limit.
416 Idle Air Control system at upper adaptive learning limit.
452 Insufficient input from VSS.
453 Servo leaking down.
454 Servo leaking.
455 Insufficient RPM increase.
456 Insufficient RPM decrease.
457 Speed control command switch(s) circuit not functioning.
458 Speed control command switch(s) stuck/circuit grounded.
459 Speed control ground circuit open.

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