Crank Sensor, Nil Fix.

[liamr685]

Hi,

I started having issues with my corsa b x10xe, It would struggle to idle from time to time, and either cut out, or rev erratically trying to find idle.

Also, whilst driving, it would feel like it was either being starved of fuel, or air, and would jolt back and forth, once recovered from the jolting, it would be sluggish to input.

After getting it scanned, i had a Mas Air Meter fault, and P0335, No RPM input/Crank sensor.

I had the crank sensor replaced, non genuine part though, this didnt seem to fix the fault, and it continues to do as mentioned above.

After having it re scanned, and live scanned whilst the engine is running, the P0335 fault keeps showing. Now we checked the wiring and connected on both the Sensor and ECU, and they seem fine, we didnt have a multimeter to hand the check the resistance through the crank sensor, so we couldnt see if we were reading the correct resistance (600 or 900 ohms, cannot remember)

In the last 12 months, its had a new EGR Valve, Oil Px sensor, Crank Sensor & Back Box. I had a new air mass meter fitted a couple of years ago.
It was also serviced fully in February this year.

Now, we're stuck for ideas, has anyone else had this, how did you fix it?

Our last resort is getting the ECU tested / repaired, or getting a second hand ECU fitted.

What would fitting another ECU have in store?
big job, not so big, what do i need to look out for? (I took a pic of all the numbers on my current ECU.

Any help would be greatly appreciated, i need to keep my car going for atleast another year until im in a financial state where i can get another car.

Regards
Liamr685

[johnny]

I'd change the maf and icv

Icv first since its hunting for idle

I don't think it's anything to do with the ecu or wiring Tbh mate

[liamr685]

I'd change the maf and icv

Icv first since its hunting for idle

I don't think it's anything to do with the ecu or wiring Tbh mate

could these still throw up the P0335 fault? after the codes were wiped, the only recurring code is 0335.

We tested the icv with the snapon computer, and it passed, no faults found.

It rarely hunts for idle though when it cuts out, it either drops to 100 rpm, then goes to 50 or so rpm over idle, then idle, or dies, 9/10 it cuts out.

It just said, that the 0335 can be caused by, fault sensor, wiring, or ECU. Now as said, sensor was replaced, wire and connectors look fine.

[johnny]

It really doesn't sound like a ecu or crankshaft sensor

Do you have access to opcom? Or any other live data reader, then you'll be able to watch what sensor is doing what

[liamr685]

Not sure, but the snapon computer that was being used did show a live snapshot whilst the engine was running.

[liamr685]

It really doesn't sound like a ecu or crankshaft sensor

Do you have access to opcom? Or any other live data reader, then you'll be able to watch what sensor is doing what

Just asked, yes the computer has a live data reader.

WHat do we need to look for?

[johnny]

You'll just be able to see all the volts and amps going through the sensor and if you use it while driving you should see very quickly what sensor isn't working as it should, either won't read or will read all over the place

[liamr685]

You'll just be able to see all the volts and amps going through the sensor and if you use it while driving you should see very quickly what sensor isn't working as it should, either won't read or will read all over the place

Shall give it a try and let you know. Anything i can try before driving, thats doesnt cost? Clean anything?

[liamr685]

Just did a 170 mile trip, during the run, the EML came on for about an hour, no notable loss of performance, since i turned the car off, then on again to nip to the shops, it takes a few seconds longer for the engine to start, it kicks over a couple more times before firing up.

Not sure if this will be related...