Joined
·
99 Posts
Hi guys,
I'll try and keep from waffling too much but I want to be as detailed as I can on this main post.
For some background, my car (2005 Mondeo 2.0 TDCI) had been on limp mode since I bought it in early December. This turned out to be because someone had removed the injectors (likely for cleaning) and reinserted them in the wrong order and all I had to do was recode the injectors in the new order, good as new (shoutout to those on TF who helped me through that!) Note, I didn't get round to performing a leak off test and it seemed my injectors were all happy once they were coded in the right order.
Before and since then, I've been flushing the fuel system with Red X fuel system cleaner with night and day results (strongly recommended).
On the day it spluttered to a halt on the motorway (misfire + smoke then complete shut-off. no restart), and for 2 days prior, the car was unhappy at idle (RPM would vary by about 10 0rpm or so constantly, something I put down to the loose alternator belt causing a variation in engine load) and it became much easier to stall.
As far as I could tell from city driving, there wasn't any power loss or hesitation at any speed above 1.3k ish rpm.
On about my 3rd overtake on the motorway (55ish to 70) at full throttle and max boost the miss firing and subsequent cut off occurred.
Bear in mind this was the third time (all 3 in the same 10 min window) that this car has been at max power and max throttle since at least early December 2021 when I bought it.
After getting a tow home, I plugged my tunnel rat into my laptop and got codes P2291 and P0251, both on my Powertrain Control Module reporting low fuel pressure (see photos attached).
After recharging my battery (ran out trying to crank and stay warm on the motorway), I went back out today and managed to hit the 250 rpm crank speed needed to start but my Fuel Rail Pressure was a measly 435 PSI peak (30 bar) and just 87 PSI (6 bar) when the ignition is on. Again, see the pics attached of my OBD ll scanner
Returning to my point of failure and the months leading up to this, this car had been in limp mode for god knows how long and probably never had any sort of injector cleaner or fuel system cleaner in it at all and god only knows when the fuel filter was last changed.
This leads me to believe that giving her the beans with the Red X flushing the system meant that I dislodged some goop in the system that has subsequently blocked up my fuel filter of unknown age. Something Forscan lists as a potential cause.
Alternatively, given the recent poor idle I mentioned previously, my high-pressure pump might have given up the ghost when it was at max pressure. Hopefully not but we can't rule it out...
I'm more than happy to hear other people's suggestions as to the root cause and I appreciate your ideas.
![White Light Product Communication Device Font]()
![Font Rectangle Parallel Number Screenshot]()
![Font Parallel Rectangle Number Screenshot]()
![Light Motor vehicle Gadget Communication Device Telephony]()
I'll try and keep from waffling too much but I want to be as detailed as I can on this main post.
For some background, my car (2005 Mondeo 2.0 TDCI) had been on limp mode since I bought it in early December. This turned out to be because someone had removed the injectors (likely for cleaning) and reinserted them in the wrong order and all I had to do was recode the injectors in the new order, good as new (shoutout to those on TF who helped me through that!) Note, I didn't get round to performing a leak off test and it seemed my injectors were all happy once they were coded in the right order.
Before and since then, I've been flushing the fuel system with Red X fuel system cleaner with night and day results (strongly recommended).
On the day it spluttered to a halt on the motorway (misfire + smoke then complete shut-off. no restart), and for 2 days prior, the car was unhappy at idle (RPM would vary by about 10 0rpm or so constantly, something I put down to the loose alternator belt causing a variation in engine load) and it became much easier to stall.
As far as I could tell from city driving, there wasn't any power loss or hesitation at any speed above 1.3k ish rpm.
On about my 3rd overtake on the motorway (55ish to 70) at full throttle and max boost the miss firing and subsequent cut off occurred.
Bear in mind this was the third time (all 3 in the same 10 min window) that this car has been at max power and max throttle since at least early December 2021 when I bought it.
After getting a tow home, I plugged my tunnel rat into my laptop and got codes P2291 and P0251, both on my Powertrain Control Module reporting low fuel pressure (see photos attached).
After recharging my battery (ran out trying to crank and stay warm on the motorway), I went back out today and managed to hit the 250 rpm crank speed needed to start but my Fuel Rail Pressure was a measly 435 PSI peak (30 bar) and just 87 PSI (6 bar) when the ignition is on. Again, see the pics attached of my OBD ll scanner
Returning to my point of failure and the months leading up to this, this car had been in limp mode for god knows how long and probably never had any sort of injector cleaner or fuel system cleaner in it at all and god only knows when the fuel filter was last changed.
This leads me to believe that giving her the beans with the Red X flushing the system meant that I dislodged some goop in the system that has subsequently blocked up my fuel filter of unknown age. Something Forscan lists as a potential cause.
Alternatively, given the recent poor idle I mentioned previously, my high-pressure pump might have given up the ghost when it was at max pressure. Hopefully not but we can't rule it out...
I'm more than happy to hear other people's suggestions as to the root cause and I appreciate your ideas.
