Discussion
Mondeo Tdci 130PS, 170,000 miles
Did 35 miles this morning, headed home, lost any real oooomph, as if turbo wasnt kicking in, no smoke of any colour, could get upto 60mph - eventually... flashing coil/glowplug light but no EML light
parked up, 10 minutes later the fault was gone/no flashing light. oooomph back
i recently recoupled the pxy EGR, the EML went off after 20 miles.
any guesses, the fuel filter is a bit overdue for a change
Did 35 miles this morning, headed home, lost any real oooomph, as if turbo wasnt kicking in, no smoke of any colour, could get upto 60mph - eventually... flashing coil/glowplug light but no EML light
parked up, 10 minutes later the fault was gone/no flashing light. oooomph back
i recently recoupled the pxy EGR, the EML went off after 20 miles.
any guesses, the fuel filter is a bit overdue for a change
Sounds like something is causing it to go into "limp home" mode and it clears when the engine is switched off and on again.
One possibility is that your turbo has variable vanes and they are sticking (carbon build-up), this is causing over-boost at certain times which causes the ECU to switch to "limp home".
One possibility is that your turbo has variable vanes and they are sticking (carbon build-up), this is causing over-boost at certain times which causes the ECU to switch to "limp home".
Change fuel filter if problem persists gat codes read
Probably P0251 which is
Cam sensor, fuel pump or injectors
I replaced cam sensor £40
No change
Gave to garage to test, they did an injector leak off test which revealed excessive leak of from all 4 injectors
You may be lucky and only replace 1 or 2.
£135 per injector + fitting + coding to ECU + VAT £790
Ouch
Probably P0251 which is
Cam sensor, fuel pump or injectors
I replaced cam sensor £40
No change
Gave to garage to test, they did an injector leak off test which revealed excessive leak of from all 4 injectors
You may be lucky and only replace 1 or 2.
£135 per injector + fitting + coding to ECU + VAT £790
Ouch
started car yesterday and it went straight to coil flashing+limp without even moving/no revving, drove a mile 2nd attempt at on/off and it cancels the fault and its fine for 100 miles, then under throttle at 60mph it goes again, neutral-on/off-start and its fine
so the fault occurs both at tickover and under throttle...
i think it the EGR, maybe cos it hasnt had to work for 6 months...
so the fault occurs both at tickover and under throttle...
i think it the EGR, maybe cos it hasnt had to work for 6 months...
Locknut said:
Sounds like something is causing it to go into "limp home" mode and it clears when the engine is switched off and on again.
One possibility is that your turbo has variable vanes and they are sticking (carbon build-up), this is causing over-boost at certain times which causes the ECU to switch to "limp home".
it has come on when starting 1st thing with no throttleOne possibility is that your turbo has variable vanes and they are sticking (carbon build-up), this is causing over-boost at certain times which causes the ECU to switch to "limp home".
Drain some fuel out of the fuel filter
If there are particles in it, could be fuel pump bearing, if this is the case, new fuel pump and injectors, if no particles get a leak off test done
My problem started with glow if light flashing and no power
Then after second restart if I again provoked glow plug light EMF light would also come on
Turn off for a while and all reset
I decided to get it tested properly when I was passing an artic and the engine cut out completely, I had to turn ignition off/on to reset on they've then could not use more than 2k revs to pass the lorry
Brown trousers moment
My money is on injectors
If there are particles in it, could be fuel pump bearing, if this is the case, new fuel pump and injectors, if no particles get a leak off test done
My problem started with glow if light flashing and no power
Then after second restart if I again provoked glow plug light EMF light would also come on
Turn off for a while and all reset
I decided to get it tested properly when I was passing an artic and the engine cut out completely, I had to turn ignition off/on to reset on they've then could not use more than 2k revs to pass the lorry
Brown trousers moment
My money is on injectors
Ordering a Ford Super-F cable+box+software as we speak
started up today, coil light flashing, drove 3 miles, stopped/restarted and coil light went off
EML was on - EGR is blanked off - I then drove 65 miles urban with no flashing coild light, the odd thing is the EML went OFF after 40 miles for 10 miles....then returned
its like the X files
car driving well, 50mpg, no smoke...
started up today, coil light flashing, drove 3 miles, stopped/restarted and coil light went off
EML was on - EGR is blanked off - I then drove 65 miles urban with no flashing coild light, the odd thing is the EML went OFF after 40 miles for 10 miles....then returned
its like the X files
car driving well, 50mpg, no smoke...
Possible the vanes in the turbo are sticking, unbolt the actuator and try moving the arm on the turbo. The actuator itself could also be the problem, while unbolted see if you get the same symptoms. Do not try to move the actuator arm itself as it contains a plastic worm drive and can break if forced.
But the reason the arm goes the one way is due to limp mode, it closes the vanes off and stops the turbo from boosting.
But the reason the arm goes the one way is due to limp mode, it closes the vanes off and stops the turbo from boosting.
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