focusdom Posted December 28, 2015 Share Posted December 28, 2015 Hi there, Got this weird problem with my engine hope someone knows what it is maybe same experience!? (I got a mk3 11reg 1.6 petrol 105bhp hatchback focus) If I start the engine up (dosn't matter if cold or hot start) it sounds like the tick over struggles, normally the rev counter goes to 10k but then it drops to 4K-6k and goes up and down for like 20sec ish if i'm lucky it goes back up to 10k and runs normal And sometimes it cuts off completely. And it's doing it sometimes 1 out of 5 starts or 1 out of 10 and sometimes ever time:( Any ideas? Thx for taking your time and reading this :) Cheers Dom Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
Russ Posted December 28, 2015 Share Posted December 28, 2015 10k = 10,000! think you mean 1k 1 Quote Link to comment Share on other sites More sharing options...
focusdom Posted December 28, 2015 Author Share Posted December 28, 2015 10k = 10,000! think you mean 1k YES SORRY!!! PUT EVERYWHERE A ZERO AWAY LOL Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
artscot79 Posted December 28, 2015 Share Posted December 28, 2015 Diagnostics I'm afraid it can be a throttle sensor throttle body maf sensor split hose gearbox speed sensor coolant sensor coil Quote Link to comment Share on other sites More sharing options...
focusdom Posted December 28, 2015 Author Share Posted December 28, 2015 Diagnostics I'm afraid it can be a throttle sensor throttle body maf sensor split hose gearbox speed sensor coolant sensor coilWhen I had that problem about 6month ago, I drove to my local garage they had it on the computer and said they couldn't find anything:( Now it starts again :/ I booked it in with ford but got that feeling they say the same. Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
artscot79 Posted December 28, 2015 Share Posted December 28, 2015 If its hunting revs like that looking for fault codes wont help it will need live data diagnostics a sensor if failing will not throw a code as its still within set parameters but live data will show what they are doing and the readings and how much they are fluctuating the list of possibilities is too big to pinpoint to any one thing even o2 sensors can cause issues a dodgy battery etc so theres not any one thing that I can say change it and it'll fix the issue 1 Quote Link to comment Share on other sites More sharing options...
m3ntal1st Posted December 31, 2015 Share Posted December 31, 2015 I had the same issue, took it to ford who said they couldnt find anything wrong, but they would give it a PCM update, and so far all`s good, it still seems to have a very small shudder when idling but seems to perform a lot better then it did. Quote Link to comment Share on other sites More sharing options...
sonic113 Posted December 31, 2015 Share Posted December 31, 2015 When looking at live data at home is there anything to compare the readings to so that you can spot which sensor I is faulty ect. I was just wondering as when I look the live data most values vary each time so it makes it a bit confusing to tell what's doing its job and what's not lol! Quote Link to comment Share on other sites More sharing options...
focusdom Posted December 31, 2015 Author Share Posted December 31, 2015 I gave it to ford they couldn't find anything with the diagnostic but he said he had a previous costumer with a similar problem so he did a update and changed a sensor (sorry forgot which sensor they changed) Didn't had any problem yet, will keep you up to date! Thx for all the help Cheers Dom Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
focusdom Posted December 31, 2015 Author Share Posted December 31, 2015 I gave it to ford they couldn't find anything with the diagnostic but he said he had a previous costumer with a similar problem so he did a update and changed a sensor (sorry forgot which sensor they changed) Didn't had any problem yet, will keep you up to date! Thx for all the help Cheers Dom Sent from my iPhone using Ford OC Oh and happy new year Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
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