Ford Repair Questions? Ask a Mechanic for Answers ASAP
the light went off after 3 seconds and stayed off.
Thats great, so we can now eliminate the anti theft system or PATS system. Being a coil on plug system, especially without experiencing any codes, we can also eliminate the ignition system. Lets eliminate base engine as well. While cranking does it sound "strong" and the same as usual when it did start in the past?
Dont mean to be a pain asking for the information, just want to make sure I can diagnose correctly.
it sounds normal, just not firing up. it spins strong. i don't have a fitting that small for my compressing tester to give you a compressing reading. i have buy other tool for my toolbox now. Those are some small spark plugs!
One of the Big Brand part store personal said it could be a cam phasers or a vtc solenoid or cam sensor.
They sure are 9/16, and if it sounds strong while cranking there is no need to check compression. Studied the pinpoint tests, and the only thing left is fuel delivery. The fact that you said you have small spark plugs means your 5.4 is a 3 valve, and uses an electronic throttle body. This in turn means you can not start it with starting fluid due to the computer keeping the throttle body shut during starting, so pressing on the pedal does nothing.
There is no shrader valve to check fuel pressure either, a Ford scanner or scanner able to check fuel pressure pid is required to check fuel pressure. (unless you are handy with adapters, to tee-in to the fuel rail which I would not waste my time attempting). The fuel cut off switch was verified in the down position as you described, so at this point I would definetly unplug the fuel pum and make sure you have 12 volts between the Brown with white stripe, and pink and black stripe wire at the harness side. If so, replace the fuel pump and your problem will be fixed.
Fuel pump is turning on. Where should I go from here?
I still believe this is a fuel pressure problem. Although the pump is working, it may not beable to supply the needed 50psi to keep the truck running correctly. Very important to check this.
The Fuel Presuure is at 41.9 to 42.0. Keeps brouncing back and forth. What's next Nick?
Thanks thats good to see! Feel much better we have eliminated this as a possible problem. Monitor you Crank (rpm) sensor, to verify the pcm is getting a crank signal, along with both cam sensors if possible. If good, might be worth it to check injector pulse by simply back probing with a led test light or noid light. ( a standard test light will not work most the time to catch the "pulse") while cranking. If no injector pulse, suspect PATS problem, aka factory passive anti-theft system. Try a spare key if availible as well. (will problably need a Ford Factory scan tool to check PATS codes, and reset parimeters if needed, along with 2 keys).
Any chance any event happen before your starting problem occured?
I have tryed a spare key and no luck. All have on my scan tool is engine rpm and hope that will work. Will check tomorrow morning on it. Have to find a noid light. The enigne would miss once and while. When warm no problem.
Okay great, lets check rpm. Any slight knocking heard when the engine was missing?
If so, this can be an actual cam phaser problem, just not likely do to the phasers on both sides would have to fail, along with being stuck way off.
The Engine Rpm cranked at 178 to 190 rpm. So does that mean it see the crank and cam sensors. I nedd to get a noid light for the injectors to see the pulse.
Did a KOEO test and this is what was returned.
P1000-OBDC system readiness not complete4
P1184-Engine oil temp sensor out of self test range
P1288-Cylinder head temp sensor out of test range
P1464-AC Demand out of test range
When turning the engine over the fuel pressure shoots to 75psi. Truck started for 5 seconds when we plugged in the noid light into the first injector then died. Any ideas Nick! You seem to be on the right path and so close. Please advise
That definetly helps. Big time. A cam sensor code is usually due to a bad cam phaser 99% of the time, along with running rough. The code is not showing up now due to the code being set from a bad reading from the phaser. I have never seen this cause a no start, but is possible. At this point, you bank 2 cam phaser must be replaced regardless with the code. The cam gear on the drivers side bank must be replaced, and your truck will probably start after the repair. We have covered all other possibilities.
This is a difficult job to ensure correct timing for a do-it yourselfer.
I took the valve cover off. Here's a video of the Driver's Side cam chain. Is this normal Slack? I brought the wedge tool to this job. What a way to start the New Year.
No, that is alot of slack, even if the tool is installed. Based on that, recommend (cant see the truck so this is stricly a recomendation based on symptoms) a compression test. If timing in front cover is off on one bank, one bank will show a different compression reading than the other, if it does, a timing component in front can be a cause. Removing front cover to inspect will help to verify. If compression is even on both banks, there is possibly something else going on. Please do not hit accept unless happy with my answer. Will also open question up by opting out to let other experts help.
Hello and thanks for using Just Answer.I will try my best to help you with your question.
New expert here.
The slack in your timing chain is very bad. These 5.4L 3 valves are bad for cam phasers as the previous expert told you. They are also bad for the seals blowing out of the timing chain tensioners and when this happens, the timing can jump and the chain guides can get worn and/or broken. I would recommend removing the front timing cover and inspecting the timing chains and the tensioners. Also check the chain guides for wear. Your engine may have jumped time causing the no start problem.
Remove the chain tensioners and look on the back side of them. The seal is part of the tensioner. If it is cut or looks blown out, they will need to be replaced and the timing chains set in time. Also replace the cam phasers. You do not need special tools to replace the phasers or set the timing chains. If you are going to do this your self, I can post directions for you.