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Help please

Posted: Sat Dec 31, 2016 11:46 pm
by luke.jeffery
Hi all just bought myself a 2001 polo gti 6n2
Car has good history covered 76000 miles.
Engine light on but all scanners can't connect?
Massive loss of power , rough tickover, missfire sometimes...
It runs rough when ever it wants no real time. Hot or cold.
Runs better sometimes then worse others.

Changed ht leads, coolant temp sensor, cam sensor but still crap.

Weird this is if I play with plug on cam sensor it runs how it should then turn it off and it's back to normal?? Then sometimes it just won't do anything...

I love the car but losing will to live...
It's really holding back and won't pull away smoothly

Any advice would be great

Thank you

Re: Help please

Posted: Sun Jan 01, 2017 11:58 am
by 6n2stan
I had the same sort of issues a few years back, it turned out to be lamda sensor problems. I had a post cat fail shortly before the wiring on the pre cat broke. The difference for me was that I had Vagcom pointing me in the right direction. It's a bit expensive changing those if it's not gauranteed to fix you problem though.

Is the coil pack still original? These can get over looked when changing plugs and leads.

Hope that gives some food for thought!

Re: Help please

Posted: Sun Jan 01, 2017 1:56 pm
by luke.jeffery
Coilpack looks new but was thinking about checking that and plugs.
Today it's drove perfect for 60 miles and it's really baffled me
No issues at all but I know I'll start later and it will be back to normal. I'm gonna book into veewee in Bristol and hopefully they can sort it as I don't wanna give up on it

Re: Help please

Posted: Sun Jan 01, 2017 2:21 pm
by 6n2stan
Hopefully their diagnostics will connect.

Let us know the outcome!

Re: Help please

Posted: Mon Jan 02, 2017 9:14 pm
by luke.jeffery
Off to vw in morning.. I did notice today that on positive clamp on battery the metal has broke and only just held on. Ovs who ever did gearbox was butcher. Off that clamp is wiring that does head to loom with cam shaft sensors etc, could that be one of problems, I did clean with electric cleaner and did run well again. Well for few hours

Re: Help please

Posted: Sun Jan 08, 2017 5:12 pm
by luke.jeffery
No one can get a scanner to communicate with car so I changed temp sensor
Plugs, ht leads and coil pack, cam sensor too but still missing and lack of power
Slowly giving up
Did notice plug 3 was wet with oil?

Re: Help please

Posted: Tue Jan 10, 2017 12:53 pm
by alexperkins
Have you tried replacing the fuel filter?

Check all the fuses as a blown fuse can cause the diagnostics not to connect