parks_200 Posted November 30, 2012 Share Posted November 30, 2012 hi, wel iv had my mb6 on ebay, sold it, the guy came to collect her and when he arrived it started to misfire its been a perfect car in the 2 years ive had it and let me down at the last second. the guy did not take it so ive started trying to fix her so i can sell it againso far ive:changed dizzy cap and rota armcleaned and contineuity tested the ht leads (sorry for spelling lol)cleaned air filter (apexi cone filter)and changed the sparkplugs to bosh super 4sand she is still misfireing, worse when the engine is cold (idle is perfect from start up) but when warm its fine as long as ur gentle, put my foot down and she drops on to 3 again if i ease off the throttle to stick to lets say 40mph then you can feel it kick back on to all 4 again, but try to get to 50 and any more than qwater throttle and its on 3.any help please and i would realy be greatfull as im now out of ideasp.s there is no engine man light on Quote Link to comment Share on other sites More sharing options...
hickster Posted November 30, 2012 Share Posted November 30, 2012 HT leads or a loose connection breaking up under high rpm vibration? Odd that it's not throwing up a code, probably rules out a sensor problem. Quote Link to comment Share on other sites More sharing options...
spud Posted November 30, 2012 Share Posted November 30, 2012 It's not the part throttle misfire that the lambda sensor causes, always from cold, mine does it, if you take your foot off and put it back on again harder does ot still do it? Quote Link to comment Share on other sites More sharing options...
civicturbo79 Posted December 3, 2012 Share Posted December 3, 2012 I would say 02 sensor as once you are over 70% throttle the engine is running on the map not the 02 sensor .Rich. Quote Link to comment Share on other sites More sharing options...
spud Posted December 3, 2012 Share Posted December 3, 2012 And above 4k revs it doesn't use o2 sensor I've been told? Quote Link to comment Share on other sites More sharing options...
civicturbo79 Posted December 4, 2012 Share Posted December 4, 2012 No its done on throttle position . Rich. Quote Link to comment Share on other sites More sharing options...
spud Posted December 4, 2012 Share Posted December 4, 2012 I've been told wrong then lol sorry for that Quote Link to comment Share on other sites More sharing options...
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