2.0 8v AGG Idle Issue

[F2 Stu]

Sods law just before selling it, the Ghetto GTi is playing silly buggers

Idles and drives fine from cold - but when upto temp its got a random spooky habit of ticking over rough as hell or reving upto 1500 rpm - 2500 rpm all on its own accord, then will idle fine...

It has recent new sparkplugs, ht leads, dizzy cap, rotor arm, and the throttlebodie cleaned not so long ago. Have checked all the vac hoses and cant see anything amiss and will plug the vag-com in to see if any faults pop, other than that I'm a tad stumped.....

 

[Brummy]

its telling you its upset at having to leave.......

 

[Fl@pper]

is it overfueling/rich when playing silly buggers?

 

[F2 Stu]

One would argue its fuel consumption is a tad high for my liking, but maybe thats my right foot no eggy or rich smells tho..

Its done it again this morning been pulled up at a set of traffic lights and the car next to me thought I wanted to race him off the lights

 

[Andi]

AFM possibly seeing as you have replaced everything else.

 

[DPJ]

Coolant temp sensor?

 

[Cupra Kid]

Crank position sensor

 

[F2 Stu]

Its not misfiring at all, just sporadically revs all over the place whenever it feels like it

 

[suj]

Idle control valve?

 

[F2 Stu]

Not too sure if its go one or where its located

 

[suj]

that's what i didn't know neither, so thought i'd suggest it, as my mate had the same on his car (not ibiza) and his ICV was messed!

 

[DPJ]

I don't think it's got an ICV - ecu controlled idle.

 

[andyj]

The 2.0 8v hasn't got an ISV, the idle is controlled by the stepper motor attached to the throttle body, hence why if the TB is gunked up stalls on idle.

I'd take a guess at the coolant temp sensor, giving the ECU an incorrect reading.....

But then that wouldn't account for the revs rising to 1500-2000rpm by itself..... hmmmm....

 

[F2 Stu]

The 2.0 8v hasn't got an ISV, the idle is controlled by the stepper motor attached to the throttle body, hence why if the TB is gunked up stalls on idle.

I'd take a guess at the coolant temp sensor, giving the ECU an incorrect reading.....

But then that wouldn't account for the revs rising to 1500-2000rpm by itself..... hmmmm....

I'm feeling the said stepper motor kicking in through the throttle pedal when its running rough or ideling at about 500rpm

Took it up through a drive through London to the Ace Cafe - one minute it would drive and idle fine then it would be all over the place and would intermittantly hold back under acceleration (kangerooing) - all though no such symptoms exist until its 1/3 on the temp gauge before the silly buggers start.

Will plug in the vag com when I get back home and see what it brings up.

 

[F2 Stu]

VAG-COM Version: Release 303.1


Chassis Type: 6K - Seat Ibiza
Scan: 01,02,03,08,15,17,25,35,56

Address 01 -------------------------------------------------------
Controller: 6K0 906 025 D
Component: SIMOS 4S 3505
Coding: 00000
Shop #: WSC 00000
5 Faults Found:
00530 - Throttle Position Sensor (G88)
30-10 - Open or Short to B+ - Intermittent
00518 - Throttle Position Sensor (G69)
30-10 - Open or Short to B+ - Intermittent
00537 - Lambda (Oxygen Sensor) Regulation
18-10 - Upper Limit - Intermittent
00533 - Idle Speed Regulation
19-10 - Lower Limit - Intermittent
00282 - Throttle Position Actuator (V60)
04-10 - Mechanical Malfunction - Intermittent
Readiness: N/A

Skipping Address 15-Airbags

Address 25 -------------------------------------------------------
Controller: 1H0 953 257 B
Component: IMMO VWZ3Z0V4080166 V00
Coding: 09600
Shop #: WSC 00000
0 Faults Found:

End -------------------------------------------------------

 

[Cupra Kid]

Nice little list to be going on with

 

[F2 Stu]

I'd say the throttle body has had it?

 

[DPJ]

I'd say the throttle body has had it?

Looking a bit that way, Stu.

 

[suj]

I'd say the throttle body has had it?

yep looks that way (especially as now we know there is no ICV)
there's a few breaking on ebay!

 

[MAC MAC]

Have you tried c.t.p switch