Can anyone tell me where the Cam Sensor is located on the VRS PD engine?

I have had some problems starting, it either starts first go (99% of the times) or just refuses. Leaving it for 5/10 minutes starts......

Scan says it is the cam sensor, but where is it??

Thanks

Alan

behind the intake/front cam pully, it has 10 to 12 cm of wire with a grey plug behind/near the EGR valve and yes the cam belt needs to come off to replace it.

Thanks for this - not good news about the cam belt.......

Are you going to drop round and see Ian?

I was asking because Ian didn't know where the sensor is located on this engine.

He's got the sensor, was hoping would be an easy change job......

Alan

Not if the cambelt needs to come off!

Sensor is held with one bolt and connected with plug socket. Changing it will be a 5 minute job, but preparation and restoration will take the time. There is nothing like good design!

Ian will do the business on Friday, pity this fault didn't appear just before he changed the cambelt earlier in the year..... may be a good idea to change sensor at same time as cam belt replacement??

Sensor replaced car back on road and all seems well....Except replacement did require cam belt removal as petetdi suggested, meaning the quick cheap job I was hoping for wasn't!! (I have been told for the 1.9 engine cam belt removal is not required).

Anyway you may be interested in the effect this faulty sensor had on the car.

Cold engine, starts first time. Warm engine (temp gauge just moving) won't start. Hot engine will start if restarted within a couple of minutes, otherwise won't start. When in won't start mode just have to wait for engine to cool down - up to 2 hours - then starts without problem!

This means of course if you are using car for commuting,(2 cold starts a day) you could have fault for some time before discovering problem!

I don't understand why cold start should be OK but not warm/hot start, assume something to do with the engine mapping?

Can anyone with more knowledge explain?

Alan

Edited 17 December, 201213 yr by barlborough

sorry may bad i've never seen a 1.9 8 valve pd VRS, i was thinking they are all 2.0 16 valves, anyway cold start on the 1.9 only uses the crank sensor then the cam sensor to fine tune when runing and fueling on hot/warm starts (2.0 needs both hot or cold so a bad sensor will allways give starting and runing problems )

I changed the cam sensor on my 2.0PD Superb MK2 without removing the cambelt, getting to the nut was awkward as the belt partially obscures it, but it can be undone using a regular toolkit. Took me about 30 mins to do it and all was good.

sorry may bad i've never seen a 1.9 8 valve pd VRS, i was thinking they are all 2.0 16 valves, anyway cold start on the 1.9 only uses the crank sensor then the cam sensor to fine tune when runing and fueling on hot/warm starts (2.0 needs both hot or cold so a bad sensor will allways give starting and runing problems )

Sorry I think you misunderstood, mine is the 2.0 16 valve. Only mentioned the 1.9 as I have been told that engine doesn't need belt removal.

But as I said the symptoms were that it wouldn't start warm, but once running from cold start couldn't detect any problems!

Alan

Edited 17 December, 201213 yr by barlborough