22 replies to this topic

[Blue Boy]

This is the 2nd time the car wouldnt randomly start. Replaced camshaft sensor after the first time it failed to start about 3 months ago, when i ran the diagnostics through it. Same issue starting again, taken it apart today to see if anything is loose, came up again as camshaft sensor. Any reason why the part would have failed so quickly. Bought the part from autovaux. My engine mounts need replacing so i thought the sensor may have shaken loose. Thanks

Edited by Blue Boy, 11 November 2017 - 04:23 PM.

[vocky]

the engine wiring loom could have a broken wire or a bad terminal at the connection plug

[siztenboots]

on the turbo the cs plug is quite prone to collect water , but it is an electrically simple device , where as the wiring loom is now getting old.

 

if the cs is unplugged then it should start with a wasted spark and wasted fuel injection , so if you had camshaft timing wrong out by a tooth/two this would get it to start.

 

but you would notice reduced revs 

 

check the single bolt and threadlock it

[Blue Boy]

Thanks guys

[Blue Boy]

Ive just put a new camshaft sensor in, new plugs, battery has been on trickle charge holding ots charge well, still no joy??? Help!! I can hear the fuel pump prime, car cranks over just wont fire

[Blue Boy]

There is fuel squirting through the rail when you press that tyre valve thingy. I have no diagnostic codes being thrown up since i changed the sensor for a 2nd time. Unplug battery and take fuses out?

[siztenboots]

Crankshaft sensor would stop injectors firing

[Nev]

The cam sensor is held on with a rather flakey single bolt that holds the sensor bracket with a fair degree of movement/alignment. Be sure that it is located as close to the moving parts as possible, so that it can pick up the pulse. It might be that NVH is loosening and pulling the sensor away from the cams.

[siztenboots]

but the camshaft sensor will not stop the engine running or starting

[vocky]

might also be worth checking the crank sensor, as they have been known to play up on the z20le* engines

[The Batman]

Cool pack stops the fuel pump going aswell if I remember correctly

[Blue Boy]

Replaced the crank sensor as well not long ago. The first replacement of the camshaft sensor resolved the original starting issue. As far as i can see, the sensor can only go on one way. There is a small hole that fits between the forks almost like an alignment guide. Whats the NVH Nev??

[Blue Boy]

Just been looking at pics of some z20let engines with cambelt cover off. Im missing the bolt the sits between the forks of the camshaft sensor!!! Its the one underneath the sensor anyone know what size or kind of bolt it ka. No wonder its getting shaken to bits

[siztenboots]

20 Screw, m6 x 14, timing belt cover, rear 1 6 38 950 90352197 https://nemiga.com/c...hall/e01/e1/30/

[Blue Boy]

Brilliant!! Ordered that!! One of my cambelt cover bolts is spinning. Any advice on getting it out? Not much room to play with

[Nev]

Just been looking at pics of some z20let engines with cambelt cover off. Im missing the bolt the sits between the forks of the camshaft sensor!!!  

 

So the sensor was held to the head but not located correctly?  

Edited by Nev, 12 December 2017 - 06:52 PM.

[Blue Boy]

Probably. The missing bolt holds the rear cambelt cover to the block. So must have been shaking the cooper wiring inside the sensor to bits. The original bolt must have come out after a trackday somehow, as i never saw it after the first time i replaced the sensor. Never mind, shall try again. Thanks again for your help peeps

[Nev]

but the camshaft sensor will not stop the engine running or starting

 

Seemingly it does. I can't imagine the ECU being too happy about not knowing what position the cams are as this is surely used to trigger the spark...

 

[Blue Boy]

Yeah it definately does stop it running

[Zoobeef]

A camshaft sensor going will normally allow the engine to carry on running. You would struggle to restart when stopped though.