copelcon91 Posted January 7, 2014 Share Posted January 7, 2014 Hi all I have an issue with my 2005 1.6 zetec focus. Basically it developed a misfire whi h turned out to be from the core plugs leaking I have had them replaced and new sparks it kept misfiring after that the garage then replaced the ht leads and coil packs and another set of sparks setting the gap to 1.3mm is that right? But it is still misfiring im 3rd gear usually when I have taken a corner then I put full throttle on and the car jumps but only a couple of times and nothing to extreme as when it first had the misfire issue.... any ideas what the problem is? The spark plug gap incorrect? ? Thanks in advanced Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 7, 2014 Share Posted January 7, 2014 what is the part number of the spark plugs you used? Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 7, 2014 Author Share Posted January 7, 2014 Hi not 100% on spark plug code but its had both bosh and now has mgk ones in Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 7, 2014 Share Posted January 7, 2014 Did you use OBD to read the error code and gives you misfire? Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 7, 2014 Author Share Posted January 7, 2014 No codes was present was only the garage saying its a misfire after them test driving the car the misfire is not as severe but there a little only one little judder every time you hit the throttle hard Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 7, 2014 Author Share Posted January 7, 2014 And only in 3rd gear high gears at high speed is fine its around 25mph in 3rd that it does it Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 7, 2014 Share Posted January 7, 2014 I had a similar problem with a friends car but the problem was there was water into the spark plug hole, what i did i took out all the spark plugs and clean with air compressor the holes. Check it and let me know. Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 7, 2014 Author Share Posted January 7, 2014 Yeah well that's what I have to but I have got 98% out but hole 4 still has a slight amount there? Possible cause? I had this from leaky core plugs Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 7, 2014 Author Share Posted January 7, 2014 When you say hole do you mean at the top where the spark plugs into ? On top? Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 7, 2014 Share Posted January 7, 2014 Yes, if that is not problem it might have a throttle problem. But check that first and let me know. Your coils and coil pack are brand new right? Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 7, 2014 Author Share Posted January 7, 2014 Yeah its got new ht leads new sparks new coil pack to just seems strange If its throttle why only 3rd? Could it be the spark plugs gap being incorrect Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 7, 2014 Share Posted January 7, 2014 it might be, check both of them. Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 7, 2014 Share Posted January 7, 2014 So no fault codes did u use genuine parts if no faults could be dodgy injector or do compression check could be mechanical issue Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 7, 2014 Share Posted January 7, 2014 So no fault codes did u use genuine parts if no faults could be dodgy injector or do compression check could be mechanical issue Agree misfire could be many things, you can start by checking the easy ones. Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 8, 2014 Author Share Posted January 8, 2014 Have had genuine parts fitted and the csrs been pressure tested when the core plugs was at fault and that didnt bring a y ither issues up but not sure if its because of the tiny ammou t of damp in cylinder 4? Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 8, 2014 Share Posted January 8, 2014 Well if it's only a slight misfire it could be that u defo need remove rocker cover dry with hair dryer or heat gun an clean plug leads with electrical contact cleaner an dry them aswell Quote Link to comment Share on other sites More sharing options...
MikeyPaine Posted January 9, 2014 Share Posted January 9, 2014 Genuine coil pack? Quote Link to comment Share on other sites More sharing options...
copelcon91 Posted January 10, 2014 Author Share Posted January 10, 2014 Seems to be repaired! Fingers crossed aparently ford focus zetec have a gap for sparks of 1mm not 1.3 1.3 can cause the intermittent missing cheers for everyones help! Sent from my GT-I9505 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 11, 2014 Share Posted January 11, 2014 Good to hear mate! let us know if anything comes up. Quote Link to comment Share on other sites More sharing options...
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