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Model specific boards => Golf mk3 => Topic started by: Mr Blue on 14 May 2011, 15:13

Title: ABF conversion. ISV and idle problems
Post by: Mr Blue on 14 May 2011, 15:13

Hello mk3'ers

Did a search but no clear answer.

I have a mk1 with an ABF conversion running ABF management.
It doesnt idle. Engine does run but just the idle is a problem. (cuts out)

The ISV does not buzz. I have no 12v at the ISV plug.

What should I check now?


thanks :smiley:

Title: Re: ABF conversion. ISV and idle problems
Post by: Mr Blue on 15 May 2011, 11:39

checked the ISV, check the throttle switch for ohms, checked the throttle position sensor,
checked all earths and wiring with no visible faults.

Still getting 0.4v at the ISV plug which i have been told it should be about 5-7v.

Could this be the ECU relay? number 30.

The relay 167 is fine and has been changed.

Title: Re: ABF conversion. ISV and idle problems
Post by: Len on 15 May 2011, 12:36

Doubt very much its the ECU relay.

Have you checked all the vacuum hoses?
And engine breathers?

Title: Re: ABF conversion. ISV and idle problems
Post by: justalex81 on 15 May 2011, 12:50

turn key to first position and isv should hum/buzz. If it isn't then that's the first thing to look at

Title: Re: ABF conversion. ISV and idle problems
Post by: MK3GTI_16Valve on 15 May 2011, 18:08

not all buzz from what i read before.....

Title: Re: ABF conversion. ISV and idle problems
Post by: Mr Blue on 15 May 2011, 23:14

I have checked all vacume hoses and everything is connected.
The breather pipe that comes off the square box is not connected to anything. Doubt this is the problem.

Replaced ISV for a new working one.

I get 0.4 v at the ISV plug. The idle problem is due to the isv not buzzing. :sad:

I also have no readings from the coolant temp sensor (two green wires)

Is their a relay for the ISV?

Title: Re: ABF conversion. ISV and idle problems
Post by: Mr Blue on 18 May 2011, 00:00

Sorted now. Thanks all the input.

Turns out the White ISV wire goes to the ECU pin 27

Black ISV wire has now been fused to 12v ignition live.

All idle problems sorted and isv working  :smiley:

Title: Re: ABF conversion. ISV and idle problems
Post by: Len on 18 May 2011, 09:04

Quote from: MK3GTI_16Valve on 15 May 2011, 18:08

not all buzz from what i read before.....

Mine does NOT buzz! Had my car for 7 years and it idles fine! :smug:

Title: Re: ABF conversion. ISV and idle problems
Post by: justalex81 on 18 May 2011, 09:21

like i said before len its probably stuck open at the right position  :laugh: :laugh: :laugh:

Title: Re: ABF conversion. ISV and idle problems
Post by: Len on 18 May 2011, 13:33

I wouldnt want it to buzz now!

And anyway I guess I wont be having one when the ITB's get fitted! :smug:

Title: Re: ABF conversion. ISV and idle problems
Post by: F17BAD on 18 May 2011, 23:06

Quote from: Len on 18 May 2011, 13:33

And anyway I guess I wont be having one when the ITB's get fitted! :smug:

nice, when matey?