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20-06-2006, 03:13 PM
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Frozen White Focus RS
Join Date: Jul 2005
Location: Brisbane
Posts: 79
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Anyone with any idea?
For the first 2 mins on the cold start drive cycle, the ST is hesitating badly to the extent that I can't upshift to 2nd gear in fear of it stalling. Coil Pack/Plugs/Leads/Sensors??? I am driving to Brisbane on Friday, Ford can't have the car until Thursday and want it on an overnight to see for themselves....can't do this as need to leave Friday!!! Any advice would be much appreciated...maybe someones experienced a similar issue on their Focus...even a std 2.0L? Thanks, Mike |
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20-06-2006, 08:54 PM
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WRC Fanatic
Join Date: Aug 2005
Location: Perth, Western Australia
Posts: 281
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Mine also runs a bit rough for the first minute or so, and this is especially true when the ambient temps are very low, however, I have not experienced the problem to the extent where I am worried about the car stalling. I always let mine warm up for at least 2 minutes before driving off, and it’s normally only 90 seconds into the drive before the K&N is thriving on the cold air and the car is running like a dream.
I think this is just a normal symptom of the ST170 ECU, and nothing to be overly concerned about. Having said that, I have noticed mine getting worse as it approaches its first major service (which I won’t have to worry about as I just sold it), so it is possible that the severity of the problem is related to the age of the plugs, leads, filters etc.
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Panther Black XR5T Pro Alloy Intercooler| Angel Eye Headlights (black)| Eibach Prokit Springs| K&N Gen II 57i CAI|
Dreamscience| InPro Black LED Tail lights| Black RS GT wheels| 14.007 @ 100.55 mph |
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20-06-2006, 11:17 PM
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Mr Focus
Join Date: Mar 2006
Location: Brisbane, southside, Redlands.
Posts: 575
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I haven't had this problem
I give my Focus at least 5 minutes to warm up
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Cosworth: 2.5" high flow exhaust system, piston & rod 8.5.1 Ford Racing: Tail lights, engine cover, racing wing, cnc'd head, manifold, 70mm tb. Lentech: Torque Convertors with 23 spline input shaft, valvebody Oz racing: WRC OBX: 4-2-1 race header SCT: xcal3, dash scan. |
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20-06-2006, 11:39 PM
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Zoom Zoom
Join Date: Jan 2005
Location: Melbourne, VIC
Posts: 4,352
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Running rich perhaps on cold start, could be dumping a little too much fuel by overcompensating for the extra rich air coming in (cold, dense air). My guess anyway. As to what's causing it... could be anything from a dodgy O2 sensor that's not warming up downstream from the cat converter? Sounds like it could be running rich though and flooding the injectors at low to mid revs. Supports the cold weather/air theory anyway.
Try if you have an aftermarket filter, try replacing the original and disconnecting your battery for half an hour, then start it the next morning. Might help restore some normality into the induction.air flow sensors. Just a thought.
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2012 Mazda3 MPS
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URGENT - Cold Start Power Loss
Linear Mode
