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*Technical Question* Cold Start Judders
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Mr-Tigger

Posted: Sat Feb 22, 2014 12:27 pm

Joined: Mar 15, 2012
Posts: 327
Trade Rating: 0
Location: Essex

So after having the GTi a year now, much work carried out yet this problem still persists, ive narrowed it down to only occuring when the engine would be on the auto-choke on a complete cold start after the first few seconds when the revs drop to around 1100. Once this starts to dim toa round 800-900 and idle normally it stops.

The question is how does the autochoke on a 206 work, is it electronically controlled fluctuations of the injectors etc, and is there a way tot weak it? Does anyone know if a re-map/map update would also cover the autochoke settings possibly? as far as im aware the car is still on its original late 2003 map it came with


	Joined the GTi massive 10/1/13 Goodbye lairy Pugani (quicksilver 1.4)

Edward

Posted: Sat Feb 22, 2014 1:12 pm

Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage

No such thing as auto choke. The car just runs slightly richer until it has warmed up. You sure it's no dodgy hydraulic lifters.


	2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible.

Mr-Tigger

Posted: Sat Feb 22, 2014 2:21 pm

Joined: Mar 15, 2012
Posts: 327
Trade Rating: 0
Location: Essex

ok so autochoke is the wrong wording,but what controls it,is it purely based on engine running temp? could be lifters i suppose,have tried some of the sticky lifter crap in the oil as a "least i tried it" and hasnt changed anything.

Essentially im curious if there's anyway of spoofing the car on a cold start not to run richer to see if it still does judder at all. doesnt seem to affect performance at all but it niggles me on those cold days


	Joined the GTi massive 10/1/13 Goodbye lairy Pugani (quicksilver 1.4)

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