[Wolfenion]

Or shall i say, will the engine turn over at least if the crank sensor is faulty?

My car didn't start the other day, the engine hardly even turned over before it died out completely. It sounded like it was a flat battery but trying to jump start it I still couldn't get the engine to turn any better. My mechanic today (alfa specialist) said he had found a faulty crank shaft sensor and I gave him the go ahead to replace it anyway. However i'm almost 100% sure that it wasn't the problem? I thought the engine will still turn if it was faulty?

Any ideas anyone? I don't want to pay 200 quid tomorrow and have the same problem over again next morning.

Thanks in advance.

 

[Mymatemarmite]

I think it would start, but run poorly......I'm not an expert though!

 

[SnowAngel x]

Mine went, and somedays it would start and other times it wouldn't.

More often not starting after I'd already started it and turned it off, then it was a waiting game until it was 'ready'

My garage charged me £30.

 

[Wolfenion]

I think it would start, but run poorly......I'm not an expert though!

I'll appreciate your input just as much :thumbs:

 

[badgers_nadgers]

I thought a dodgy crank sensor would make it cut out, then not start when hot, but all fine when cold. I'm no expert either though!

 

[Alfa-Red]

as above, but can be an issue getting it to start in the first place (loads of cranking), but more often when its warm

 

[Wolfenion]

Mine went, and somedays it would start and other times it wouldn't.

More often not starting after I'd already started it and turned it off, then it was a waiting game until it was 'ready'

My garage charged me £30.

Yeah, but at least your starter still turned your engine didn't it? It just didn't ignite if I got you right. Mine hardly even turned, but the battery was fine at the same time. That is why i think it's the starter.

 

[davealfa11]

I think it would start, but run poorly......I'm not an expert though!

if crank sensor is faulty ecu wont know if engines moving or where crank is

 

[Wolfenion]

I see guys. Thanks for your input very much. My engine didn't even turn as i've mentioned already but at least now i'm sure it wasn't the crank sensor that was preventing the engine from turning over.

I'm starting to think there could be something draining my battery now when i leave the car parked over night. Has anyone else has had a similar issue when the bettery gets drained over night, or maybe over three days like mine. I'm pretty sure nothing is left on inside like mirror light.. I'll let my garage know tomorrow.

 

[davealfa11]

boot light is a goood one not noticed

 

[Wolfenion]

boot light is a goood one not noticed

Ohhhh! Now that's a very good one. I'll get that checked too. Thanks Dave!

 

[Alfa-Red]

glove box light too, that gets missed or the battery is completley fudged

 

[Rockhopper]

The engine will turn over as normal with a duff crank sensor but won't start. If it does start it will stop as soon as the sensor gets hot and won't run again till its cooled down (about an hour).

 

[Chris M]

My 2.0 TS would not start when hot when the crank sensor started playing up, but it would start once the car had cooled down a bit. It did not stop the engine from turning tho....

 

[davealfa11]

could it be more serious than what we think tho

 

[Wolfenion]

could it be more serious than what we think tho

I'm hoping if there is nothing wrong with the car electrically, it's just a faulty battery. Mine is a year and a half old halfords sealed calcium battery. I think it's still under warranty actually.

Hopefully it's nothing "unusual" that will require hours of fault finding and guessing. If there is an electrical problem that is draining the battery that is.

 

[Wolfenion]

glove box light too, that gets missed or the battery is completley fudged

Mine hasn't got a glove box light lol. When i bought it the bulb holder was broken and didn't even have a bulb in it. Not that you can tell when you open the glove box though, the transperant plastic cover over the hole is intact.

 

[davealfa11]

did car start eventually or was it towed to garage

 

[Old Engineer]

When my crank sensor failed it was after a motorway run and parking up for 20 minutes. Started initially but packed up within a mile. Once cooled down all was well again. From sharing the problem here I got a good steer that it was the sensor.
The problem shows as just churning over as a normal start but no firing.
I bet your problem is a failing battery.

 

[Wolfenion]

did car start eventually or was it towed to garage

They had to get it towed to the garage, 55 quid extra. I don't mind as long as it gets fixed.