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gkm24
31-01-2014, 03:36 PM
This Polo is really getting to me.
It will not start without putting your foot on the throttle and turns over as if the timing is really advanced i.e. it fires at the wrong time causing the engine to act as if it has a hydraulic lock if you know what I mean.
Idling is also a problem and it keeps stalling.
So far it has had a Coil, leads, plugs and Distributor. The compressions are spot on and the timing is also spot on.
When the engine is up to temp and the gauge shows 90 degrees, on the snap-on scanner it shows that the engine is at 25 degrees??

I scanned for codes and got these:
1 00282 Throttle position actuator V60 open circuit occurs intermittent
2 00609 ign coil power output 1 open circuit/short with ground. occurs intermittent
3 17978 Engine ECU Blocked
4 00519 MAP sns G71 not a plausible signal intermittent.

Cleared the codes, ran the car and codes don't come back.
Not sure if poor starting is causing them to come up or faults are for real as when starting the car from cold, its as if the battery is bad as when it seems to hydraulic lock( firing at wrong time) the dash goes blank(mileage and clock) and then dash buzzes??
Any help greatly appreciated as its driving me mad.
In the meantime, I am looking for a throttle positioner to fit to it.

Sam
31-01-2014, 04:19 PM
The non-start issue seems to be compounded by the throttle issue

The following two links give a few things to try.

17978/P1570/005488 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/17978/P1570/005488)

00282 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/00282)

The Snap On, while a decent scanner, may not be picking up all the errors. Where are you based? Is there someone close to you (see our map here (http://www.vwaudiforum.co.uk/forum/showthread.php?134957-VCDS-User-Location-Map)) who could help you with a VCDS scan

gkm24
31-01-2014, 04:31 PM
I have VCDS but the snap-on was to hand. Thanks for the reply and links.
Maybe the 17978 code came up because I ran the car with the scanner connected in Codes mode??

gkm24
31-01-2014, 05:43 PM
Thinking about it, Maybe the starter is at fault and struggles to turn the engine over, then draws so much current that the dash goes blank and throws up some codes??
I once had a Mercedes that did that and put the ECU into limp mode if it was slow to turn over. Turned out to be a dodgy battery on that.

That said...Why does the dash make a buzzing sound?

Sam
01-02-2014, 09:28 AM
Scan with VCDS and see what codes come up.

Is it an electrical-contact-not-properly-connected buzzing or a warning buzzing?

gkm24
01-02-2014, 12:30 PM
Sounds like a warning buzzer i.e. oil pressure or something.

Sam
01-02-2014, 04:16 PM
That ties in with the ECU error from your first post and the dim/blank dash.

Get the VCDS scan done and see if it reveals any more info.

gkm24
15-02-2014, 10:01 PM
It has been a while but I have re-scanned this car and still have a problem. When you try to start it from cold, the engine spins over and then acts as if it is hydraulically locked for a second and then continues to spin and then starts.
At the same time as it falters in the starting cycle, the dash clock and milometer go blank as if the battery is flat but the battery is good.
This problem also throws up a " ECU Blocked" code in the scan.
It is as if there is a bad earth on the car but I have connected a Cable from the -ve battery to the block and it still does it.

Im pulling my hair out here now. Anyone got a clue or seen this before?

Sam
17-02-2014, 10:30 AM
What did the VCDS scan show?

gkm24
17-02-2014, 05:18 PM
No Fault codes but then after it did the start thing again it showed ECU Blocked. The idle was all messed up again so I guess it upset the basic settings again.

Sam
17-02-2014, 05:53 PM
The same code as before?

17978/P1570/005488 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/17978/P1570/005488)

Have you tried what the link suggests? What was the outcome?

gkm24
18-02-2014, 03:22 AM
I did look at this but it is not the immobiliser. The engine will always start but but its like its a bad earth that comes and goes.

Sam
18-02-2014, 10:28 AM
Was it the same code as before?