Thread: Fuel Pressure Challenge 2010 D4 2.7

So I thought I would give an update on my plight to resolve P2290-00 Injector control fuel pressure too low. Since my last post I have had LPFP tested and all ok. Replace the fuel rail pressure sensor as well as all 6 injectors.

Picked up the car today and about 2ks Restricted Performance and Tran Fault showed up. Turned the engine off and reset. Drove straight back to the workshop and same fault code presented itself. P2290-00 Injector control fuel pressure too low.

So far I've replaced Fuel filter (several times). HPFP. ECU. Fuel rail pressure sensor. 6 injectors. Also overlaid wiring to the fuel pump.

I'm now completely stressed and frustrated. Does anyone have any thoughts please? I'm desperate.

Thanks

Originally Posted by Morris

So I thought I would give an update on my plight to resolve P2290-00 Injector control fuel pressure too low. Since my last post I have had LPFP tested and all ok. Replace the fuel rail pressure sensor as well as all 6 injectors.

Picked up the car today and about 2ks Restricted Performance and Tran Fault showed up. Turned the engine off and reset. Drove straight back to the workshop and same fault code presented itself. P2290-00 Injector control fuel pressure too low.

So far I've replaced Fuel filter (several times). HPFP. ECU. Fuel rail pressure sensor. 6 injectors. Also overlaid wiring to the fuel pump.

I'm now completely stressed and frustrated. Does anyone have any thoughts please? I'm desperate.

Thanks

I guess one of the assumptions that’s not always valid is that the new parts are actually good. I suspect you still have a dud HPFP despite its replacement.

Originally Posted by DiscoJeffster

I guess one of the assumptions that’s not always valid is that the new parts are actually good. I suspect you still have a dud HPFP despite its replacement.

I recall that happened to Bulletman with a "known good but second hand HPFP" (I have his original one here awaiting a teardown along side mine). I note that Morris said he used a new Ford Terry pump, so it was a brand new pump anyway and the part numbers cross-referenced.

The only other thing I recall ever being mentioned is the return line from the filter to the tank which has a restrictor in it that can come loose, but that would cause noticeably low fuel pressure at the schraeder and the low pressure system would fail testing.

Given you've replaced practically everything else, as inconceivable (yes I keep using that word, and yes I think it means what I think it means) as it seems I'd concur with Jeff.
I see the graph of fuel pressure, but have you managed to graph the fuel pressure against the PCV and VCV requested positions when the fault occurs? If it's a sticky valve it's absolutely obvious in the data.

Thank you for your responses. Yes you are right Brad it is a new Ford Territory pump, but I believe the only difference is the branding.

So I dropped the car back to the mechanic and he took the car for a long drive monitoring the fuel pressures and injectors and the cat didn't fault. Everything was fine according to his diagnostic instrument.

I collected the car and about 500m down the road at low speed, 40-60kph, low rpm it faulted. I pulled over and restarted. The car reset itself, then I couldn't reproduce the problem. I drove it low speed & low rpm. Drove it like I stole it. Stop go under harsh acceleration. Nothing. Clocked about 45kls. So now it appears it's doing the opposite. Faulting on low speed low rpm and not under rpm load.

I've parked it for the night and try again in to morning with my gap tool connected. See what happens. Is it possible the fuel system including the ECU is resetting itself after the new injectors. The car goes like a bullet.

I'm really lost now.

Thanks

Originally Posted by Morris

Is it possible the fuel system including the ECU is resetting itself after the new injectors.

No

I'd check that someone hasn't fitted a 2nd fuel filter/pre-filter and not told you or recorded it in the manual or service book, although that would show up as fuel starvation under full throttle, or look for a blocked, pinched or kinked fuel line.

Also the LP pump tests fine when there is no fault, but might be something intermittent, so not excessively worn but losing 12volt power, or seizing/binding?

Originally Posted by RANDLOVER

Also the LP pump tests fine when there is no fault, but might be something intermittent, so not excessively worn but losing 12volt power, or seizing/binding?

That’s why I drove around with a fuel pressure gauge cable tied to the drivers side wiper arm. Not pretty, but absolutely definitive.

Originally Posted by BradC

That’s why I drove around with a fuel pressure gauge cable tied to the drivers side wiper arm.

Good thing you don't live in Melbourne.