i have a poorly signum

[squirrell25]

ok as the title say my signum is poorly it's a 2.2 direct

i have pluged it in and read the codes

i have p1191- fuel rail pressure sensor cirrcuit low input
(5a) - present

i have looked on autodata and checked the voltages at the plug

heres what autodata says

pin 2 & earth at idle =1.6v
pin 2 & earth at 3000k = 2v


heres what i have got


pin 2 & earth at idle = 1.63v

pin2 & earth at 3000k =0.61v


to me that would mean the sensor is knackered

does anyone else agree

[paulvectrac]

yep looks like it mate common problem the fuel pressure regs

[squirrell25]

yep looks like it mate common problem the fuel pressure regs

already changed the reg about a month ago

this time it as come up with fuel sensor and having checked the voltage it would seem it knackered

will order a new one see what that does

[shaun.b]

Hi should be sorted when you fit it.

[squirrell25]

Hopefully it will just waiting for the sensor to come tomorrow or Friday And see if that doesn't cure it I will claim on my warranty for the pump to be changed

getting sick off drivin the fiesta st I have been lent

[jiffy1986]

Dont know if this may help, but im a renault mechanic, and the 2.0 ide engine uses a very similar if not the same continental direct injection system as the vectra 2.2 direct. Common problem with the ide engine is fuel pressure regs failing, even new ones have failed after a couple of weeks! Also the sensor and connections to it. The sensor terminals must match the colour terminals on the loom, some have silver some have gold. Also i have changed the odd pump. The regs are really poor quality even the new ones being supplied, as the vectra will probably use a similar reg. good luck with your diagnosis

[squirrell25]

Dont know if this may help, but im a renault mechanic, and the 2.0 ide engine uses a very similar if not the same continental direct injection system as the vectra 2.2 direct. Common problem with the ide engine is fuel pressure regs failing, even new ones have failed after a couple of weeks! Also the sensor and connections to it. The sensor terminals must match the colour terminals on the loom, some have silver some have gold. Also i have changed the odd pump. The regs are really poor quality even the new ones being supplied, as the vectra will probably use a similar reg. good luck with your diagnosis

Thanks I changed the reg about a month ago when that went it came up as the reg but this time it as come up with the sensor so going to try that first if not the warranty can do the pump as I am not pay for the pump to be done

[squirrell25]

so my signum is still poorly
i have fitted a new pressure sensor but it as not made any differance apart from it as stopped putting it in limp mode


i have checked the pressure reading for the pump i am getting betwween 4700 - 5200 kpa at idle and goes upto over 9000kpa at around 4-5000 rpm


the misfires if accelerated hard while standing still it feels like the limiter is on but it only at 3-4000rpm and it also misfires when driving if i accelerate hard
the engine light flashes when it does this while driving but not standing still


anyone got any ideas before i send it in

[squirrell25]

well my signum as just gone in to vauxhall just got to wait see what it is

on the plus side there is a recall on my car for the handbrake so thats being done while it's there

[jiffy1986]

Thanks I changed the reg about a month ago when that went it came up as the reg but this time it as come up with the sensor so going to try that first if not the warranty can do the pump as I am not pay for the pump to be done

Ive had a few where its came up sensor but it was actually the reg causing it as it was under-pressurising and would flag a sensor fault up. Regs are really poor quality i had one fail after three days!