GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: Adezmk3 on 13 August 2014, 13:22
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Any ideas on what the problem could be with this? The crank position sensor and relays had recently been changed before it was parked up.
All searches I do point to 8v issues not 16v so I am struggling to find a cure.
Cheers,
Adrian
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If the ecu thinks the timing is out it will still go into safe mode, of this I am 99% sure.
I would check the crank sensor is correct/fitted correctly
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it could be this, try key popping it.. ( i know it sounds silly) but rev at 2k, then key pop, that should let it rev to maximum, this fools the ECU.. if it is that im certain its what your man above says.^^^. I know this from previous experiences!
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what the hell is key popping?
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what the hell is key popping?
Something that dosent sound healthy to the car :P https://www.youtube.com/watch?v=7WLDX0Bv9VE
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If it only revs to 5k it's in safe mode => fault memory will tell you why :whistle:
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so key popping is just revving it when its cold ,like in the utube link ??
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Nah it'll only work on carbed vehicles. Injected vehicles stop fuelling when engine braking or when the ignition is off, whereas carbs continue to fuel through the pilot jets as the engine is still cycling. Basically, JoseMcGeevio is talking b*llocks.
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Ok maybe key popping isnt the correct phrase, that link clearly isnt what i was trying to suggest i wouldnt rev the bollocks off my car when its cold.
And i also said revving at 2000rpm..
I wouldnt post something online just for the fun of it or to mislead somebody(which i did!). I WAS NOT suggesting "key popping" the vehicle will make
the problem dissapear i was suggesting keeping a constant rev @ say 2000rpm then maintaning the same pressure on the throttle whilst turning the
ignition on and off rapidly, then try it.. I had that problem and i was sitting with my thumb up my arse and i was informed that it works by a chap off
clubpolo, this will not solve the problem but the car will rev to its maximum until you next restart your engine then the problem will occur.
I will post a video up of the problem i had i recorded it then you can make your judgement whether i am talking 'bollocks'.
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Ok, noted. It is, however, well documented (on here, and many other places) that the revs being limited at 5k can be caused by the cambelt slipping a tooth, amongst a few other things. If there is even a slim possibility of this being the root of the problem, the potential for damage by 'tricking' the ECU into allowing the engine to rev over 5k is significant.
A more sensible approach would be to have the fault codes read, and proceed from there.
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Hi,
Unfortunately I'm not able to get the fault codes read. I've not had a chance to check if the timing belt has moved but I am pretty sure it hasn't. The car was parked up for about 2-3 months unstarted. In that time the ISV did get stuck so it wouldn't idle (this I have now freed up). Before it was left it definitely would rev cleanly to the red line (this I am 100% certain of) so I am more inclined believe its a dodgy sensor somewhere.
The fuel pump and ECU relays had recently been replaced, the crank position sensor, cambelt, waterpump, ECU coolant temp sensor, breather hoses, plugs etc and the car ran perfectly fine after this.
Any other ideas? It's not really 5k, its about 4.5k that it starts to struggle.
If anybody in the Hinckley area has vagcom and they could scan for me that would be great. I have tonnes of mk3 spares (currently have 5 mk3s to my name plus loads of bits and bobs from a few I have broken so would happily trade scanning for some parts).
cheers
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Same prob years ago take the battery off and fully charge it.
Might sound odd but worked for me
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leaving this key popping aside..
i'd do what makes sense to me and thats scan it with vag-com. see what error codes pop up.
sounds like it's your hall sensor.
if you check the mk3 maintenance common issues thread there's a section on this.
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Which hall sensor do you suspect? The only one I am aware of on the ABF is the crank position sensor.
Thanks
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Which hall sensor do you suspect? The only one I am aware of on the ABF is the crank position sensor.
Thanks
look in the mk3 maintenance section, there's a list of the common problems. It shows the hall sensor in a similar area as the crank angle sensor, but not the same thing (i think)
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you also need to have the cam belt inspected.. if it's even one tooth out, the engine goes into safe mode and won't let you rev high.