martyngsxr Posted November 28, 2016 Share Posted November 28, 2016 on my way to work this morning and while in traffic my 1990 750l dropped a cylinder made it to work got a new set of plugs and it all seemed fine but on the way home it started to drop a cylinder again got it home did a bit of investigation but couldnt find anything obvious but took it out and it seems when it gets warm and you pull away from tickover it is only firing on 3 but as soon as you get above 2000 rpm the 4th cylinder comes in now im thinking it may be some dodgy fuel or i have a coil going down Quote Link to comment
mick-ne Posted November 28, 2016 Share Posted November 28, 2016 (edited) Maybe a pilot jet blocked so its running ok once your onto the Main jet Edited November 28, 2016 by mick-ne 2 Quote Link to comment
martyngsxr Posted November 29, 2016 Author Share Posted November 29, 2016 i think it may be a coil problem once it gets warm it starts dropping out but what ever it is its annoying Quote Link to comment
martyngsxr Posted December 1, 2016 Author Share Posted December 1, 2016 Okay fitted a cheap set of coils from Eblag until I can find a decent set of originals and it seems at the moment it's cured Quote Link to comment
almostthere Posted December 1, 2016 Share Posted December 1, 2016 might be time to try a set of stick coils I picked a set up for my wn cheaper than standard coils Quote Link to comment
martyngsxr Posted December 1, 2016 Author Share Posted December 1, 2016 I was thinking that myself but I'm a bit like a monkey fucking a football when it comes to electrics Quote Link to comment
richyrich Posted December 10, 2016 Share Posted December 10, 2016 ive got a troublesome 750L to. I found that replacing the old green dyna coils with the ones from a b6 gave a much bluer, better spark. The dynas gave a 2ohm primary resistance vs the 3 their website ses they should have and a 12 ooo ohm secondary resistance, which is in spec. The suzuki coils also gave a 2ohm primary resistance but 40,ooo ohm secondary, both are in spec. I dont really know what all that means. i like fat blue spark, still wont start it tho the f***** i think b6 coils are the same as b12 coils, i read that somewhere but havent checked part numbers. maybe theyre cheaper. stick coils twenty quid a pop when i looked at them Quote Link to comment
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