Mk 1 16v crank sensor location

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mac1776
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Mk 1 16v crank sensor location

Post by mac1776 » Mon May 20, 2019 11:51 am

Hi all, I am going mad looking for the crank sensor, please tell me where I can locate it please, thanks Mac

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Re: Mk 1 16v crank sensor location

Post by Dave_16v » Mon May 20, 2019 3:33 pm

Pretty sure it is n/s, look around the area under the hp pump, you should see located down there. Not the easiest place to get at. It is a while since I had to look at one, so long in fact it was on my phase one long gone. I am not near my car to check but 99% it is there, something you see but take little notice of until there is a need.
I take it you have still not got it running.
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Re: Mk 1 16v crank sensor location

Post by mac1776 » Mon May 20, 2019 3:47 pm

Hi Dave, I have replaced the rotted out fuel line, refitted the fuel tamk, for £10 I figured I would replace the sensor prior to giving it a go. I will whip off the hp pump and see if I can see the little sod!! Thank you for the reply, I was beginning to think it didn't have one!!! Regards Mac

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Re: Mk 1 16v crank sensor location

Post by Kitch » Tue May 21, 2019 10:33 am

It's under the bracket for the HP pump. Bit of a sod to get to. I did it without removing the bracket once, but it was a bit of a workup.
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mac1776
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Re: Mk 1 16v crank sensor location

Post by mac1776 » Wed May 22, 2019 4:28 pm

What a scream that was!!!! Thanks for your answers. Now I have fuel all the way up to the pressure regulator on the injector rail but nothing is getting through to the injectors. Everything is connected up and the battery earth terminal is getting very warm. How do I get fuel to the injectors? Its like the regulator is shut off. Please help again, thanks Mac

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Re: Mk 1 16v crank sensor location

Post by Dave_16v » Wed May 22, 2019 8:12 pm

Hi Mac,

Sorry that has not sorted it.

If you look at the regulator you will see it is at the end of the rail, fuel reaches the injectors first. The regulator keeps the petrol pressure at a constant. Perhaps it is not maintaining pressure or the fuel pump non return valve is not working so the pressure is too low.
Your problem could still have something to do with the cranking which is the time a signal is sent to the injectors. As I mentioned on the 16v site, your relay may be clicking but that does not mean it is fully working. It can click when powered up but if the other pins are not passing on a signal, nothing will happen. I believe there is an extra bit of "magic" in the injector relay so if that is not functioning it could be the problem. Have you fully disconnected the relays and cleaned them?

Have you cleaned all your earth leads and connections, the larger to the engine, the one to the battery plate if you have one (a ribbon) and the one which attaches to the n/s wing. Again, as I said on the 16v site, is your battery good? A battery not offering sufficient power could be an issue, you are looking for around 12.6v.

These are just things I would check before you start having to check power and earthing associated with ecu pins.

I wish I had an instant cure, someone may suggest something else and eventually something will work.
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Re: Mk 1 16v crank sensor location

Post by mac1776 » Wed May 22, 2019 8:37 pm

Hi Dave, thanks for the comprehensive reply, when I first got the car fuel arrived at the regulator first, rather than the other end of the rail. I take it this is still incorrect? All I have done is replace the rotted fuel lines and reassemble accordingly. I have cleaned all the contacts and earhs leads but judging by what you have said the fuel delivery is entering the wrong end, at the reg? Thanks again, regards Mac

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Re: Mk 1 16v crank sensor location

Post by Dave_16v » Wed May 22, 2019 9:03 pm

Here is a GTi set up for example.

No.2 is the pump, 3 the filter and 5 the regulator.

Image
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Re: Mk 1 16v crank sensor location

Post by mac1776 » Wed May 22, 2019 9:16 pm

Fingers crossed buddy, I will sort that issue out, have Trumpton on standby and then give it a run. I will be amazed if I get a result but will let you know. Kind regards Mac