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Author Topic: V.Lumpy Idle  (Read 1085 times)

Offline ollie6n

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V.Lumpy Idle
« 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!
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Offline ollie6n

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Re: V.Lumpy Idle
« Reply #1 on: 24 April 2008, 18:04 »
Any Ideas spring to mind anyone, was hoping someone may have had the same problem. . .
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Offline boneybradley

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Re: V.Lumpy Idle
« Reply #2 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?
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Offline Rmachines

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Re: V.Lumpy Idle
« Reply #3 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.
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Offline boneybradley

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Re: V.Lumpy Idle
« Reply #4 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!!
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Offline Rmachines

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Re: V.Lumpy Idle
« Reply #5 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:
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Offline ollie6n

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Re: V.Lumpy Idle
« Reply #6 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:
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