Question about 2006 Ford F-150

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I have an 06 f150 5.4 that cranks but wont start. Ive got fuel but no spark on any cylinders. I cranked it and the RPM's dont move. Could this be the crank sensor and if so where would it be l

5.4 3 valve

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  • Ford Master
  • 42,795 Answers

Run the fault codes to check which sensor is switched off. It could be a crank position sensor but it could also be a cam shaft position sensor or immobiliser that is non operational.

Posted on Nov 10, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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eagletwo811
  • 2 Answers

SOURCE: engine cranks but won't start; how do I tell if fuel pump needs replacing?

take the gas cap off and have some one listen when the key is turned on and listen for a humming if it hums its working you might want to replace the crank sensor that's the most common reason for no start

Posted on Dec 20, 2011

Testimonial: "checked for the hum and nothing. Bought a new fuel pump, removed the old pump and installed new one along with a new strainer & fuel line filter. Works great now. Thanks! Btw...the pump is inside the fuel tank & you must remove the tank in order to remove the pump. This isn't too complicated but it takes some time, patience, & a little help."

97F350diesel
  • 1326 Answers

SOURCE: 89 ford probe wont start, engine cranks ,

Its pretty hard to test the fuel pump relay. Easiest way to test fuel function is at the motor from the fuel rail. There should be a high pressure fitting (similar to a tire valve stem) that you can push in to check for fuel. It should squirt out (fuel) if the pump is sending fuel to the motor and if not start back tracking looking for fuel pump/pressures/leak issues. If you decide to replace the relay then I would suspect $30-$50 or find a decent on at a junkyard. The relay should click when ignition is turnerd so u know its working properly.

Posted on Jan 22, 2011

  • 491 Answers

SOURCE: no spark 1991 ford f-150 5.0 EFI

check your eec wires on driver side under hood for shorts

Posted on Jun 06, 2009

cansmo
  • 2431 Answers

SOURCE: 1998 Ford Explorer, 4.0 SOHC No

You are at thhe right trail what controls spark is coil pack crank sensor sparkplugs and plug wire but the most important is power . I mean 12 volt connections and ground This includes checking fuses you need a simple volt meter doesnt have to expensive or fancy just to pick up 12 volts let start with fuses in the engine juction box (there not mark to what it belongs to) make sure none are open. especially fuse 19 and 24 , next go to the crank sensor make sure the tabs are snuggly on now to the coil pack there is a red and light green wire this comes from ignition and feeds 12 volts at the coil pack measure that voltage is it 12 volts if not correct it this is from ignition switch ( you can make a tool that feed 12 volt with a wire and a fuse in series and attatch it to battery and the primary wire this is known as hot wire) next go to the ECM wiggle the wires see if that get a connection going if not go back to the ICM here are the wire you are to measure the tan light green, this is from ECM and it is pulsed it measure 5vlts to 0 volts switched then measure the tan orange the same thing 5 volts to zero,then tan white again 5vlts to zero. any one of these 5 to zero fails you fix is the ecm

Posted on Aug 21, 2011

ginko
  • 19396 Answers

SOURCE: 2003 ford Taurus DHOC 3.0

Hi.

The PCM is located in the rear right corner of the engine compartment, sticking to the firewall:

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The PCM can be replaced with a new or used god-working one. In both cases the PCM must be reprogrammed using a Tech 2 tool that costs about $3000. The operation is done at the garage.

The PCM is unlikely causing misfire on a single cylinder. Check wires going to spark plugs. If the coil is getting no 12V on the ignition side check ignition. It is strange that one coil has no power, the engine usually does not start when that happens because the same coil gives power to spark plugs on different cylinders.

Check if there is a capacitor fixed to the head aside the coil (there should be one). It should be cylindrical and one inch long, held by a single screw and located aside the coil. If there is a capacitor, that must be replaced with the coil. If you have not replaced the capacitor that is probably involved in the problem.

If you have already replaced crankshaft position sensor, check crankshaft position sensor harness in PCM. I uploaded here the bulletin with CKPS to PCM testing:2003 Taurus CKPK PCM testing.

Test the PCM and CKPS connectors. Check again voltage to coils and spark plug cables. I understood that spark plug cable nr.3 has no spark from coil. Check DC in from ignition to coil.

Posted on Sep 01, 2011

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I have a 2000 grand prix 3.8 non supercharged.I replaced th head/intake gaskets..plugs/wires..etc. now it cranks but won't start. I used an inline spark testlight(I dont have a helper so I connected it...


Diagnose the no spark first. Check to make sure the crankshaft position sensor is not damaged and is plugged in. Check to make sure the camshaft sensor is also plugged in . Does the car have a RPM gauge? If so, check to see if the needle moves while cranking the engine, this would indicate the crank signal is good. Also, check to make sure the ground wires got attached under the ignition module bracket. The short burst of fuel is not uncommon on an engine that is not running.

Feb 22, 2015 | 2000 Pontiac Grand Prix

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How to check a ignition coil pack to see if its good,


the coil does not crank the engine , the starter does that, sorry.
(if you ever had to hand or foot crank and engine , youd under stand that. (like motor cycles or boat engines, or per 30s cars.)

in fact will crank all day with no spark parts on car..

x2, the scan tool does tell you why there is NO STARTS, CRANKS OK. The pcm can detect, one missfire in 10 cmp;ckp signals.
  • CRANK FOR 5 SECONDS
  • release, key
  • scan tool has DTC errors?, read the believe them.
no engine stated of 4 or more,

U checked everything but spark,
why, check spark at all cylinders, all most fire or the engine will not run or stall.
That test be first, if not starting (AFTER SCAN TEST)

IF NO spark fuses are next , not last.
lets do no start fails tests. (cranks perfectly 200 to 300 rpm)
  1. : check fuses
  2. key on, CEL lamp must glow, if not , ECU fuse blown.
  3. crank with scan tool , see P03xx DTC errors, see RPM dead.?
  4. check for spark? got spark x4 or times number of cylinders?
  5. got spark try test fuel now, runs for 3 seconds?
  6. yes, runs on test fuel now means lost fueling
  7. no, dont run on test fuel, means, 1 to 5 done wrong above or engine compression bad.
  8. bad fueling, huge number of tests. check fuel pressure now.
confused, try a shop and watch them, learn.

Jan 12, 2015 | 2005 Suzuki Forenza

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Low voltage


does it crank fast, at 250 spec RPM?
no year, no joy, all cars have a year,
and and engine option (displacement size???)
my wild guess, is it wont crank or cranks dead slow.
right?
and the battery is DISCHARGED. right,
use jumper start cables. start now?
that be first.

wont crank
cranks perfectly but wont start ?(check for spark, x number of cyl)
spark good, try test fuel
test fuel works for 3seconds and stalls,. then fueling problem , ask.

Jan 21, 2014 | Suzuki Grand Vitara Cars & Trucks

1 Answer

Ok guys I have a 97 lhs the fuel pump went bad replaced it car ran great again but now it wont start turns over have replaced the fuel filter and the coil pack and still it wont start im stumped please...


this is not unique to chrysler, at all, its EFI.
all EFI works alike , the shapes change to fool the non tech.

i dont know about you, but in my shop
i check fuel pressure and you found it at zero
then put in a new pump and didnt check pressure.
why would you do that? after all it was zero.
and you do that and its still zero. then find a bad wire /connector
in the fuel pump power feed or the fuel pump relay.
or ? a inertial cut out sw, or rollover switch. (i said generic)
now rule 2: if spark is bad, the ECU cuts fuel,
BY DESIGN. that dont mean spark really is bad, but does mean
the ECU can not SEE spark, or that the Tachmeter line is dead.
All ECU monitor spark 1 way or the other, and if that fails.
there WILL BE NO INJECTION period.
use your scan too to see DTCs while cranking and dead RPM cranking for 5 seconds, release key and look for crank or cam
sensors errors, key key on for 1min to see them pop up.

your are stumped because you are not troubleshooting, only guessing. and will make you broke fast.
here at the simple tests, in the proper order.
1: compression on all cylinders. if all are horrid.
the cam timing is way off. no motor will run like this.
2: spark check for spark. ! at all spark plugs, not just one.
3: make sure the ECU is happy about spark, RPM moves cranking , etc.
if spark tips are dry at this moment test fuel can be used.
does it start now then stall as the the test fuel is consumed.?
4: check for injection.
do the injectors click , do all of then click , cranking>?
if all fail, i can assure you the ECU is CUTTING FUEL!!!
if one dont click , then run a NOID lamp test in this injector
and make sure the coil reads near 10 ohms not infinity.
5b: you can do an injector balance test.
cranking, see that the pressure drops, as you crank.
Ill not cover this , as its a SOP proc, in all EFI books published.
but take to bank, can witness the drop in pressure and know the injector does in fact inject.
that way or by looking at fuel soaked spark tips.

the injectors can fail in many a way, they are fuel cooled.
A:shorted coil, open coil
B: ecu driver dead.
C: injector clogged or leaking (leaking causes flooding)
the injector has inside 10 micron screens. tiny,
d: bad fuel. cant burn or clog s screens.

you are now totally confused (above) or are un-stumped.

if you dont understand EFI at all , then lets go back to 1920.
this works too, on all otto cycle engines
1: compression, good, time number of cyclinders.
at spec. all equal, most 150psi to 200 is typical today.
2: got spark times all cycliners.(oh, yes, timing right)
3: over fueling or under.?

that is it, its and air pump , if it can pump air, it's hopeless.

the 3 steps work , every time. the tests are easy and are documented for 90 years, now.

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92 wrangler wont start


Jiggle the wire connectors going in to the computer under the hood -- first check battery cables/terminal connections at battery -- beleive it or not, connection could SEEM good because you get crank & lights, but if it's faulty, loose, engine won't start - computer requires good solid voltage flow.. next check a fusible link very close to the battery off of the positive cable. check fusible link carefully. this could cause your problem for sure.

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My 2000 clk 320 wont start it cranks but wont fire, The fuel pump is not coming on the relay is good. the cps is putting out a little over 1vac. I checked the voltage at the cpu connector e pin 37 &...


The only thing that will shut the fuel and the spark - is crank position sensor. And they do go bad on MB.
If you have scaner which can read data from the engine , you can monitor the rpm while you crank the engine , if you see 0 rpm while cranking , CP sensor caput.

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1 Answer

Engine cranks but wont start


Usually if no rpm signal, the vehicle won't start. Engine cranking, did you check for spark at the spark plugs? The fuel pressure you listed may have been the initial prime. It sounds like no injector pulse. The rpm signal comes from crank sensor. If your missing rpm signal, may thought is the crank sensor.
Were there any applicable trouble codes?

Apr 06, 2017 | 2001 Ford F150 Styleside SuperCrew

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1997 gmc savana 4.3, wont start ,has new fuel pump, new pressure regulator, new spark plugs , i cleand up the maxi ijector, looks ok no leaks,i do have spark and fuel but still wont work any ideas


only 3 things will cause this engine not to start (crank and not start) fuel, ignition, timing.
You haven't mentioned the engine cranks over or not, so I have to assume it cranks over.
Possible timing chain or the crank sensor on the timing chain. Have you checked this? you need to remove number 1 spark plug & when the piston is in the full top position on compression, remove the dist cap & see what spark plug wire the rotor is pointing to inside the dist cap. (I'm sure if you google checking for top dead center you'll find the proper procedure)

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