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Model specific boards => Golf mk3 => Topic started by: ollie6n on 24 April 2008, 15:07

Title: V.Lumpy Idle
Post by: ollie6n on 24 April 2008, 15:07

Hey guys, I've just been out for a spin in my car to get some photos only after parking, started it up and it sounds like its misfiring now. . . v.strange as it wasnt before, it's dropping to about 750rpm and almost stalling, then it will jump up to around 1500rpm. . . I've just taken all the HT leads off to see if I could find a problem there but no such luck, havin a pretty sh!tty day so far so any help would be well appreciated!

Title: Re: V.Lumpy Idle
Post by: ollie6n on 24 April 2008, 18:04

Any Ideas spring to mind anyone, was hoping someone may have had the same problem. . .

Title: Re: V.Lumpy Idle
Post by: boneybradley on 24 April 2008, 18:08

possible vacuum leak as thats causes similar issues..check all the breather pipes are ok
i think stopping it and restarting it is just coincidence?

Title: Re: V.Lumpy Idle
Post by: Rmachines on 24 April 2008, 23:16

Clean the throttle body?   seems to be the answer to most problems on golfs  :grin:

Mabey its the idle up valve?  the Idle stablisation valve as its called on a golf.

Title: Re: V.Lumpy Idle
Post by: boneybradley on 24 April 2008, 23:19

Quote from: Rmachines on 24 April 2008, 23:16

  the Idle stablisation valve as its called on a golf.

only on the bosch injection (early 8v and all 16v) tho.... the simos 8v dosen't have one!!

Title: Re: V.Lumpy Idle
Post by: Rmachines on 24 April 2008, 23:28

Ok in that case it will be one of the following.....

ECU - Basic setting/coding
Air intake system/vacuume leaks
Fuel pressure /regualtor
Condition of fuel/filter
Idle air control (IAC Valve)
Idle speed control actuator
Idle Actuator possition sensor
Evaporative emssion cansiter perge valve
Injectors
Engine coolent temp sendor
O2 Sensor
MAF Sensor/MAP Sensor
Air intake temp sender
Engine Compression
Engine managment connections/wiring
Engine control module.

Now.. where do you start  :grin:

Title: Re: V.Lumpy Idle
Post by: ollie6n on 27 April 2008, 19:22

~Haha, problem solved! There's a vacuum hose leading from the top of the inlet manifol all the way back to the ECU. . . cotton overbraid it is, the hose had split and come off, stuck another bit in its place, all sorted, got some more ordered though, re-do all the overbraided vacuum hose I can find now :laugh: