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[terry paget]

X84GNB 2.5 petrol manual estate
A month ago above car refused to start, though it cranked vigorously enough. Crank sensor, thought I. Had to be Siemens, I knew. Found one on e-bay, £25, for 2.5 Omega, Siemens, right part number. I bought it, it was made in France, and hd part number ground off. I installed it, fault cured. 2 weeks later, in a deluge, misfire developed. Serves me right, I thought, cheap sensor. Bought Vx sensor, fitted it. Misfire remained. Changed plugs, 3 & 6 oily, inferring dodgy dis pack, so changed dis pack. Misfire cured.

Last Friday, after stalling twice, engine stopped and refused to restart. Rang wife to rescue me, when she arrived engine restarted, stalled twice more, but got me home. Vx crank sensor no good, thought I.

This morning engine would not start. I replaced the Vx crank sensor with the £25 sensor. Engine started OK. Drove 30 miles drive, no problems.

That Vx sensor had done about 60 miles before failing. I shall return it to dealer next Friday, demanding a replacement.

Perhaps Vx sensors are going the same way as water pumps.

[chrisgixer]

Define "would not start". Cranking only, cranking firing stalling, no cranking?

Any codes?

[terry paget]

Define "would not start". Cranking only, cranking firing stalling, no cranking?

Any codes?

Cranking only.

[chrisgixer]

Re stalling....Did it stall on the power or at tickover?

[chrisgixer]

And, any codes?

[terry paget]

Re stalling....Did it stall on the power or at tickover?

Stalled on tickover.
I did not check for codes, EML had not come on or flickered. Last Sunday codes 132 and 17 appeared after dis pack change. I expect they are still stored. Fault seemed classical crank sensor so I changed it.

[chrisgixer]

Re stalling....Did it stall on the power or at tickover?

Stalled on tickover.
I did not check for codes, EML had not come on or flickered. Last Sunday codes 132 and 17 appeared after dis pack change. I expect they are still stored. Fault seemed classical crank sensor so I changed it.

It does appear that way, just looking for possible other causes before you have to buy another.
Stalling on tick over is usually icv, but could also be cs. Misfire in a deluge could be leaking scuttle.

[chrisgixer]

132 egr feedback incorrect signal. Is it blocked / plugged in?

17 knock sensor signal bank 2. Is the wire trapped?

I'd also check again, see if you have 19 crank sensor

[terry paget]

Re stalling....Did it stall on the power or at tickover?

Stalled on tickover.
I did not check for codes, EML had not come on or flickered. Last Sunday codes 132 and 17 appeared after dis pack change. I expect they are still stored. Fault seemed classical crank sensor so I changed it.

It does appear that way, just looking for possible other causes before you have to buy another.
Stalling on tick over is usually icv, but could also be cs. Misfire in a deluge could be leaking scuttle.

Misfire was caused by dis pack. When removed one end was split, and the plates were exposed and rusty. On replacement of dis pack the misfire was cured. I made a point of sealing the scuttle around the central wiper shaft hole, using Vx cam cover gasket sealant.
 
I presume Bellingers will replace the failed crank sensor under warranty. I bought it on December 20th.

There was no fuel delivery on cranking when the engine would not start 4 weeks ago. I was told that this is normal as the fuel pump relay is ECU controlled and is only powered when the ECU detects crank sensor pulses.

[Andy H]

Maybe the problem is a poor connection between crank sensor and ECU (but not the usual problem with the flying lead from the sensor).

Have you checked that the locking ring is tight on the big round plug and that the ECU is securely plugged in? (better still check for water or corrosion in the metal pins of those connectors)

[terry paget]

132 egr feedback incorrect signal. Is it blocked / plugged in?

17 knock sensor signal bank 2. Is the wire trapped?

I'd also check again, see if you have 19 crank sensor

Thanks Chris. I think I have confused you. Those codes were last Sunday. The knock sensor was not plugged in; I plugged it in. The EGR valve solenoid was very loose. I changed it  The EML light stayed on Sunday, but went off Monday. The wire was OK.
All was well Wednesday, and I was looking at the possible n/s rear wheel bearing fault, and stripping the n/s handbrake. That work is still ongoing. The car embarrassed me on Friday by breaking down in Keynsham and stopping me getting to Wantage for my weekly gathering. All seems to be well again, though time will tell.

[terry paget]

Maybe the problem is a poor connection between crank sensor and ECU (but not the usual problem with the flying lead from the sensor).

Have you checked that the locking ring is tight on the big round plug and that the ECU is securely plugged in? (better still check for water or corrosion in the metal pins of those connectors)

I checked the flying lead connector to the crank sensor at the roadside waiting for the wife.

I will check the big round plug and the ECU connection. Thanks for the suggestion.

[AndyStobbs]

Would deffo gather more info before you bounce into vx.
As stated already there could be a wiring issue underlying. Faulty new sensors do exist ofcourse, but its uncommon - doesn't mean you haven't got one, doesn't mean you have either.

[terry paget]

Maybe the problem is a poor connection between crank sensor and ECU (but not the usual problem with the flying lead from the sensor).

Have you checked that the locking ring is tight on the big round plug and that the ECU is securely plugged in? (better still check for water or corrosion in the metal pins of those connectors)

There are two big round plugs at the back of the battery. The one on the engine side is not attached to the plastic plate, but broken off. Both seem securely plugged in. I cannot identify the locking ring or see how to unplug it. Is there a guide?

[terry paget]

Would deffo gather more info before you bounce into vx.
As stated already there could be a wiring issue underlying. Faulty new sensors do exist ofcourse, but its uncommon - doesn't mean you haven't got one, doesn't mean you have either.

Fair comment. This morning the car would not start, so I got it into the garage. I tried again to start it, again it just whirred away. I then changed the crank sensor, turned the key, and it started. I suppose I could put back the other sensor and try again. I shall not be in Wantage till next Friday, so there is plenty of time to make checks. I am open to suggestions.