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Author Topic: Irratic Idling and power loss  (Read 2424 times)

Offline novadragon007

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Irratic Idling and power loss
« on: 28 December 2012, 21:16 »
Was taking the mrs up to a friends house last night and noticed while i was waiting in the car the engine seems to be idling rather lumpy. Instead of just sitting just below 1000 revs it seems to be down around 600 revs and the car shakes every so often, sometimes the revs will bounce back up to 8 or 900 and fall below the 600 as if its about to cut out. Took her where she needed to go and arriving there the car just cut out soon as i dipped the clutch, restarted and pulled away, dipped the clutch and it cut out again. Also seems to be a slight loss of power. My engine light is on but its been on since i bought it as its got a full custom exhaust on it. I would provide codes but dont have access to a code reader and im not aware if the mk4 has a blink function by shorting out certain pins on the connector. Anyone got any ideas whats causing my issue and how i can fix it.
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Offline rio_gti

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Re: Irratic Idling and power loss
« Reply #1 on: 28 December 2012, 21:17 »
Vacuum leak??
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2000 GTI 1.8t ARZ, S2000 filter, DSG intake, Forge 007 dv, Catch can, R-tech custom remap, 3" Supersize Silicone TIP, Powerflex dog bone, 'The Beast' FMIC, Ultimate delete, LCR fuel pump, 3" Turbo back, K03 hybrid, Ported Manifold, S3 injectors, 80mm maf = 280bhp 270lbft :evil:

Offline novadragon007

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Re: Irratic Idling and power loss
« Reply #2 on: 28 December 2012, 21:23 »
take it thats a smoke test for vaccum leak? Another symptom to add sorry was the battery light came on when it cut out those times but there is no loss of power from the battery as it starts the car no problem after cut out.
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Mk4 GTi 1.8t 16" BBS Alloys, Coilovers, Full Exhaust, Catch can..... More to come - If i ever beat this 17705

Offline barrym381

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Re: Irratic Idling and power loss
« Reply #3 on: 28 December 2012, 21:27 »
can let you use my code reader if your ever near glasgow  :wink:
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Offline markallen

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Re: Irratic Idling and power loss
« Reply #4 on: 28 December 2012, 21:34 »
MAF sensor. Just start the car as normal then unplug the sensor. It's located just after the air box. If this is the same fault as mine it will idle fine straight away. Don't run it unplugged though it will do damage. £121 for exchange at your local dealer. I'm picking mine up tomorrow. Hope this helps?
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Golf Mk4 GTi Turbo, R32 front bumper, Lowered on ProSport Coilovers, Bora illuminated vents, Armrest, Heko wind deflectors, Aluminium vinyl trim.

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Offline novadragon007

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Re: Irratic Idling and power loss
« Reply #5 on: 28 December 2012, 21:38 »
Nice one i'll give that a try tomorrow. Just my luck its an expensive bit that goes.
Quote from: barrym381 on 28 December 2012, 21:27
can let you use my code reader if your ever near glasgow  :wink:
If i wasnt working constantly id take a run up haha joys of working in retail over the festive period
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Mk4 GTi 1.8t 16" BBS Alloys, Coilovers, Full Exhaust, Catch can..... More to come - If i ever beat this 17705

Offline markallen

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Re: Irratic Idling and power loss
« Reply #6 on: 28 December 2012, 22:20 »
Let me know how it goes. You can pick them up from pages, ecp etc but apparently there just refurbished and don't last long.
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Golf Mk4 GTi Turbo, R32 front bumper, Lowered on ProSport Coilovers, Bora illuminated vents, Armrest, Heko wind deflectors, Aluminium vinyl trim.

Soon to be added, FMIC, 3" exhaust, Remap..oh and new turbo :(

Offline beppe2672

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Re: Irratic Idling and power loss
« Reply #7 on: 28 December 2012, 22:53 »
Give it a clean mate before you fork out for a new one! Search on eBay for maf cleaner, only a few quid and might save you some cash!
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Offline markallen

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Re: Irratic Idling and power loss
« Reply #8 on: 28 December 2012, 22:55 »
I cleaned mine but it only worked for a week. You might be lucky though.
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Golf Mk4 GTi Turbo, R32 front bumper, Lowered on ProSport Coilovers, Bora illuminated vents, Armrest, Heko wind deflectors, Aluminium vinyl trim.

Soon to be added, FMIC, 3" exhaust, Remap..oh and new turbo :(

Offline Rob Zombie

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Re: Irratic Idling and power loss
« Reply #9 on: 28 December 2012, 22:58 »
I had a problem with the suction jet pump - cause lumpy idle as I popped out- might be worth taking a look
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Performance mods: Revo stage 2 map, 5 Peice Hose Kit & TIP, Evoloution Motorsport Air Filter, N249 by-pass, Forge spliter valve, ECS N75 Valve, KW 50mm springs &shocks, Front & Rear Eiabach ARB, Full Milltek Turbo back exhaust.
 
BHP: 231
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