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EF XR6 Cranks but won't fire up 

 

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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Wed Feb 08, 2012 6:08 pm 
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Mon Feb 20, 2012 4:19 pm 
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fiend wrote:
** IF IT RUNS "PERFECT" FROM A CRASH START THEN THE FUEL PUMP MUST BE FINE **


You are correct, its not a fuel pump issue. Any hints then? Please. Injectors? Cause this is starting to do my head in. I've never had a car that was this difficult to get running....
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Mon Feb 20, 2012 4:22 pm 
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Mon Feb 20, 2012 4:35 pm 
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fiend wrote:
Done the crank angle sensor at front of engine above harmonic balancer right....?


I pulled it out & cleaned it but I do have spark. Confirmed it with a timing light
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Mon Feb 20, 2012 4:39 pm 
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66 coupe wrote:
it does sound like a smartlock issue, before changing the battery, pull the codes from the ecu and see if its showing a code for immobilization

^ have you done this?
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Mon Feb 20, 2012 4:43 pm 
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^^ How does an immoboliser work? Surely it doesn't allow spark, fuel and cranking all at the same time? Aparently after crash starting this car runs fine. Smartlock allows this?!

Hell, I know Smartlock is Stupid, but that really takes the cake.
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Mon Feb 20, 2012 4:51 pm 
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66 coupe wrote:
66 coupe wrote:
it does sound like a smartlock issue, before changing the battery, pull the codes from the ecu and see if its showing a code for immobilization

^ have you done this?


To be honest, no. I have since pulled the battery out to charge it now anyway
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Wed Feb 29, 2012 6:24 pm 
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Went back to it tonight, threw the battery in. Tested injector pulse; all good. Found no power at the fuel pump :? Checked at the relay; all good. Plugged fuel pump back in & it fired up.

Must have been the fuel pump :D
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Thu Mar 01, 2012 7:25 am 
Getting Side Ways
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Could not be fuel pump if the car ran fine from a crash start.... Must be some reason for the fuel pump to be dying.....

No fuel pump means no fuel to engine. No fuel to engine means nothing happens.

These cars run a pressurised fuel system.
TANK >
PUMP >
FUEL LINES (with inline filter) >
FUEL RAIL (with injectors) >
PRESSURE REGULATOR (keeps pressure in fuel rail at 270 or 300 kpa as per manufacturer install - 300 XR6, 270 base models) >
"RETURN" FUEL LINES >
TANK >
PUMP >

etc...

Fuel keeps moving around in this loop. The pressure created from the pump blasts the fuel through the injectors and into the motor. The injectors are only open for a split second when the cycle in the engine is at correct position to accept fuel... The inlet valve opens and the engine sucks the fuel and air into the combustion chamber.

If fuel pump stops for whatever reason, so does the car. Pretty much instantly.
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Thu Mar 01, 2012 1:14 pm 
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fiend wrote:
Could not be fuel pump if the car ran fine from a crash start.... Must be some reason for the fuel pump to be dying.....


I'm picking I possibly didn't plug the fuel pump back in properly after I replaced it or dodgy connections at plug. Thats the only conclusion I can come up with

Thank you for your input fiend
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Sun Mar 04, 2012 9:36 am 
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Does anyone still do new fuel pump relays for the EF's? Ford says they're obsolete :?

(yes it stopped again :lol:)
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Tue Mar 06, 2012 7:41 am 
Getting Side Ways
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OMG.

OMFG.

Hahahah

Uhm... What relay is it? Take a photo and show me where it is. I'll be able to find one.... One day... Next time out at pick-a-part.,
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Tue Mar 06, 2012 11:24 am 
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buriedalive wrote:
fiend wrote:
** IF IT RUNS "PERFECT" FROM A CRASH START THEN THE FUEL PUMP MUST BE FINE **


You are correct, its not a fuel pump issue. Any hints then? Please. Injectors? Cause this is starting to do my head in. I've never had a car that was this difficult to get running....


welcome to the life of fords
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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Tue Mar 06, 2012 11:42 am 
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Have you checked both the fuel pump relay and the ECU relay under the header tank?
Check them both for signs of corrosion

 

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 Post subject: Re: EF XR6 Cranks but won't fire up
Posted: Sun Mar 11, 2012 12:43 pm 
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Ok so I picked up 2 2nd hand fuel pump relays (one for spare) & threw one in; success. Been running perfect for a good couple of days.

Now driving to Tauranga, hit the Kaimai's & half way up it died. Coasted to a halt (amongst traffic) turned the key & it fired straight up again. Did this 3 more times before I got to the top. Driving around tauranga it appears to be any sharp or fast LH turn & it dies.

Have noticed that the oil pressure gauge seems to be reading quite high then drops down to half when cruising at a steady speed then fluctuates. Not sure if this coincides with it cutting out yet. Yes it has plenty of oil

Pickup backwards perhaps?
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