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Matt
Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22005
Experience:  BEng hons Mech engineering, in auto industry 22 years
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i have a 2004 53 plate 3.2v6 tt,it has 56k on the clock,it

Customer Question

i have a 2004 53 plate 3.2v6 tt,it has 56k on the clock,it has regular service etc,but has developed a misfire and irratic idle,on diags it is showing camshaft position error on both sensors, but no dash indicators, after reading various forums i am wondering about chain stretch or coil issues,any help would be appreciated
Submitted: 3 years ago.
Category: Car
Expert:  Shantal-Mod replied 3 years ago.
Hello,

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Expert:  Matt replied 3 years ago.
Hello

I've encountered this error before on the same engine in a golf

In that instance it turned out to be a faulty inlet VVT actuator coupled with a airleak on the inlet
any air dragged in here isn't 'seen' by the ECU and so not compensated for and can lean the engine out and can also allow the engine to rev up when not desired causing rough running.
As its a mechanical fault it tends not to turn on the fault light and you can sometimes hear a 'hissing' noise with the engine running.

Check the hose clips for tightness and inspect the trunking for any cracks or splits and also all the vacuum system, the small bore pipes and fittings for cracks and missing parts.

The best way to locate a leak is to have the engine running and warm and then spray lighter gas /propane around each joint in turn. If the engine rev's up you've found your leak.
Now you might think that spraying lighter gas around a hot engine isn’t wise, however the flash /ignition point of gas is about 400°C so you need a naked flame or spark to set it off and I’ve used this method for many years without incident.
Work your way through each possible joint one at a time and you should find it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to provide a spraying 'wand' and allow a direct blast of gas into each area, especially those difficult to reach with large implements.


so check for airleaks 1st and if thats OK the try unplugging the VVT solenoid on the cam cover to see if this makes any difference