max Posted November 27, 2014 Report Share Posted November 27, 2014 hello strange problem im having and wondering if anyone can help. sometimes i can go to the car and it fires straight away i can then turn it off straight away and it can take ages to start over 10 seconds. other times i can go to the car when its cold and it wont start for over 10 seconds. same when warm sometimes fires straight up other times takes ages. there seems to be no consistency with it starting to narrow down the problem. Quote Link to comment Share on other sites More sharing options...
Simon Posted November 27, 2014 Report Share Posted November 27, 2014 Hi Max First step will be to get an laptop plugged in and see if when the engine is not starting if it has RPM or if it is taking the 10+ seconds to get an RPM reading. If it is not seeing an RPM reading we then need to look at the trigger configuration and the signals from the crank/cam sensors. Quote Link to comment Share on other sites More sharing options...
max Posted November 27, 2014 Author Report Share Posted November 27, 2014 Hello it has rpm straight away it has a few trigger one errors but as soon as it starts i get no more. Quote Link to comment Share on other sites More sharing options...
Simon Posted November 28, 2014 Report Share Posted November 28, 2014 What trigger mode are you running? The trigger errors could be a sign it is not getting a sync correctly and is waiting for this before starting. Quote Link to comment Share on other sites More sharing options...
max Posted November 28, 2014 Author Report Share Posted November 28, 2014 hello trigger 1 is crank with reluctor sensor 36 teeth one missing trigger 2 is cam reluctor sync mode none and both trigger 1 and 2 are on filtering level 2 Quote Link to comment Share on other sites More sharing options...
max Posted November 28, 2014 Author Report Share Posted November 28, 2014 ive had a play and think your on to something with the triggers. i changed the sync mode from none and went through them all on cam pulse x1 i got no erros i then changed it to cam level and it was firing straight away every time but wasn't running properly and kept cutting out and loads of erros but as i say was firing all the time. i'm using factory triggers on a ford zetec engine the crank sensor is in the fly wheel and is a 36-1 the can sensor is in the head and reads off a single lobe on the flywheel end of the inlet cam. would i be getting green triggers if one of the sensors was wired incorrectly. i also forgot to mention sometimes when im turning it over and it doesnt start it occasionally backfires out the exhaust. Quote Link to comment Share on other sites More sharing options...
Gsab Posted November 30, 2014 Report Share Posted November 30, 2014 "i also forgot to mention sometimes when im turning it over and it doesnt start it occasionally backfires out the exhaust." Cam sync trigger will have an influence on this.. Quote Link to comment Share on other sites More sharing options...
Simon Posted December 1, 2014 Report Share Posted December 1, 2014 I would certainly be checking the polarity of both sensors. As with that trigger pattern it would be possible to have them wrong with out any major adverse effects. Quote Link to comment Share on other sites More sharing options...
max Posted December 1, 2014 Author Report Share Posted December 1, 2014 Looked at the wires and they were both the wrong way round but still the same problem. It turns over like there is no spark then fires then once started runs perfectly. Quote Link to comment Share on other sites More sharing options...
Simon Posted December 1, 2014 Report Share Posted December 1, 2014 Any chance of a scope capture while the engine is cranking? Quote Link to comment Share on other sites More sharing options...
max Posted December 2, 2014 Author Report Share Posted December 2, 2014 will try and get one also whats strange is if i just turn the key and let it turn over if it doesnt start straight away it wont start no matter how long i leave it turning over and more than likely backfire . but if i turn it over for a few seconds at a time it will normally fire after two or three times like it has to be in a particular part of the engine cycle. Quote Link to comment Share on other sites More sharing options...
max Posted December 2, 2014 Author Report Share Posted December 2, 2014 would the trigger sync mode have any affect on this Quote Link to comment Share on other sites More sharing options...
Simon Posted December 2, 2014 Report Share Posted December 2, 2014 Yes but you only really have the one correct option in using CAMX1 Cam level will only work correctly with a hall/optical sensor and a tooth that is occurring across the gap on the crank. If it was having a hard time picking up a cam sync it would definitely cause hard starting. Quote Link to comment Share on other sites More sharing options...
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