All Things Mk5 > How to Guides / Troubleshooting

Warm starting/cutting out issues

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Poverty:
My car has some intermittent faults. It had these for a while now, and I can symphatise with dealers when it comes to intermittent faults, as its hard to fix something when its working fine infront of you. It had 12 fault codes at the time, however none really related to each other.

Anway car got reflashed and it was fine for a while, but the every now and again it will play up. Like refusing to start when warm, cutting out on idle, or cutting out after a WOT period when slowing down and clutch is depressed. Have had misfires detected on VAG COM, car running like a bag of nails with the engine shaking violently and the exhaust sounding like its blown.

When it refuses to start I have to depress the accelerator to bring the engine to life but even then after revving it for a while it can still die when left to return to idle. Then after it has done that and I physically stop it from dying by just revving it a little, the car will stay running but it will idle at up to 1500rpm and then say half hour later it can go back to normal.

Now I can only presume its either fuel or ignition related. Changed the sparks for some iridium ones but it still refused to start up once after taking it for a drive.

Can coil packs be intermittent?

Car has done 9000 miles, but its been doing it since about 5000.

Oh and I can get a combination of fault lights on the dash, the most frequent being the epc, esp and low tyre pressure light combined, but the car wont always limit the revs with these lights on display, and when the epc light goes away, the other two will remain on and the epc will be disabled until I restart the car.

Think this will probably be a job for Jkm or AMD me thinks.

chungster:
could be maf / coil packs / hole in intake pipework somewhere?

ur car has been tinkered with quite a bit hasn't it???

Poverty:

--- Quote from: chungster on October 25, 2009, 08:04:27 pm ---could be maf / coil packs / hole in intake pipework somewhere?

ur car has been tinkered with quite a bit hasn't it???

--- End quote ---

It has hpfp internals, blueflame dp, revo stage 2 plus and itg intake.

The car has done it with mods and without any mods though.

Think im gonna change the coil packs unless someone has a good reason why it would be unlikely to be that, just its sorta odd for the coil packs to be intermittent, and surely if it was them one of the pack would have given up ghost by now?

Janner_Sy:
id change them, you've done the plugs, so take the hole spark equation out.

 have you done your PCV. not sure if that could be at fault. If your manifold take off isnt tight it could cause fluctuations etc.

Nasir:
I know my car isn't the same (Golf 1.4 FSI MK5) but my car didn't start up from warm sometimes, turned out to be a temperature sender. The problem hasn't occured since. Maybe worth a try.

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