Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[jay99]

Hello again!

I haven't posted in ages as my omega hasn't been driven often since I've got to uni but the problem is as follows:

Car was running fine but the next morning I go to start it up, it cranks very strongly, there is popping and banging but it simply won't fire. Deduced that it wasn't the immobiliser since no flashing light and no code.

AA guy comes out, puts extra 5 litres of fuel, redoes the can sensor wiring since its a bit iffy, sprays easystart, finds cam sensor code and puts code down to cam sensor. Even though I protest and say that it should still start without one.

Problem is, the crank sensor was changed 6 months back and is virtually new, but the clutch was changed a few weeks ago, so it might have been disturbed.

Would a faulty can sensor cause these issues? Car was running perfectly I don't see how this could have happened so suddenly.

Now, its parked in a space where I'm repeatedly getting parking tickets and I want to take it into a garage but I can't find a backstreet one in York (where I've moved to) and most ones I've telephoned seem to charge 40-45 an hour!!!!

What does the forum deduce? I also have a feeling of deja vu as I've had this issue before and it was the crank sensor which I replaced and it was fine but now I'm being told cam??? Could the clutch change somehow have disturbed the crank sensor?

Help!!

Thanks

[Kevin Wood]

Was it a genuine crank sensor? If not, it may well have failed early. Pattern ones tend to be rubbish. Wouldn't be surprised if the cam sensor has gone too, as it's a common issue on 4 pots, and if both have failed, there is no chance of it starting, even in limp mode.

[Diamond Black Geezer]

Sounds the obvious one, but get it somewhere safe / /decent. Even having a 'on the sly' word with a friendly lecturer, see if they'd be willing to let you park it 'round the back' somewhere. There's always a little bit of yard or somewhere like where the Biffa bins are kept, etc.. at Unis... Then sort out some means of getting it towed. If it's an Auto you're not supposed to tow without the 'bopx oil being pumped round - however, a short run should be 'ok' - guessing you've got a Manual, in which case no such worry.

I'd go with cam and crank sensor, yes. Patterns either don't work right away or just go pop prematurely. So it's either stump up big money on a genuine Vx one, or try and get/borrow a known good 2nd hand one.

Best of luck, keep us posted 

[Marks DTM Calib]

Cam sensor code reported........popping and banging......muppet using easy start (shows the low competence level of whoever came out).......just double check the cambelt and cam timing.

[Diamond Black Geezer]

Cam sensor code reported........popping and banging......muppet using easy start (shows the low competence level of whoever came out).......just double check the cambelt and cam timing.

I did raise an eyebrow over that... it's a bit like someone saying their arm hurts like hell, they think they've broke it, and a doctor giving them morphine, and told to carry on as normal...

[Kevin Wood]

Cam sensor code reported........popping and banging......muppet using easy start (shows the low competence level of whoever came out).......just double check the cambelt and cam timing.

I did raise an eyebrow over that... it's a bit like someone saying their arm hurts like hell, they think they've broke it, and a doctor breaking their arm anyway, giving them morphine, and told "hmm, yes, I think you might be right"...

Fixed for you.

[Diamond Black Geezer]

Cam sensor code reported........popping and banging......muppet using easy start (shows the low competence level of whoever came out).......just double check the cambelt and cam timing.

I did raise an eyebrow over that... it's a bit like someone saying their arm hurts like hell, they think they've broke it, and a doctor breaking their arm anyway, giving them morphine, and told "hmm, yes, I think you might be right"...

 
Fixed for you.

[zirk]

+1 for the Cam Sensor.

[jay99]

GM Cam sensor ordered for next day delivery tomorrow just need a cheap garage/mobile mechanic around York to do it.


Still highly suspicious that it is at fault and it shouldn't realistically prevent starting.

If it turns out to be crank then I'm in big trouble.

What if the timing has jumped? How would I check this?

[Shackeng]

Reply #1, first question.

[terry paget]

Changing the cam sensor involves removing the cam belt cover, so you can check the timing then. But if it has jumped more than 2 teeth it would clatter horribly when cranking, as the valves and the pistons meet. But as you did not report clattering, timing has not jumped.

[jay99]

Hopefully it should be okay as there was no clattering!

By the way, due to it not starting whatsoever not even for a small amount of time, am I probably right in presuming that both are dead? So does that mean that if the crank sensor is faulty also? So does that mean that if cam sensor is replaced, that it should at least start for a little while/ limp mode or give me a code for crank?

[05omegav6]

As I understand,  yes it should eventually start, so you should at least then be able to move it away from the traffic wardens

It may or may not give a crank code, but symptom would be extensive cranking to start rather than a flick of the key...

[peter the butcher]

York is notorious for parking, I hate it, got a ticket when i was 5 mins late last year. And Wetherby in the Leeds post code is no better, I moved as was sick of getting them there.

I replaced my cam sensor, after it failing to start a few times, best advice from these nice chaps here

[Shackeng]

It would be helpful, as posed in post #1, to know if the crank sensor fitted 6 months ago was GM OE, as while it is not impossible for such to fail so soon, it makes it a less likely culprit.