Oui super quand le bloc multi air est obliger de casser même avec un entretien irréprochable c'est inévitable et il le font payer a notre charge alors que c'est leurs technologies ce n'est pas une pièce d'usure.
Trying to solve a uneven tickover and misfire on No 1 cylinder that does not seem to be caused by any logical cause. Its a Punto Evo multiair turbo 2010 plate. It starts from cold no problem and has no error codes or lumpy running until it hits 60c and the revs drop to around 800rpm. It then throws up P0301 P0300 P0302 misfires in 1 & 2 never 3 or 4. So I have Moved coilpack 4 to no1 and vica versa, same result as above. Removed the coilpack from no1 when it says misfiring to check for a spark, good blue spark. Changed spark plugs, same result, starts from cold and runs perfectly untill 60c then misfires. Removed the injector rail, manually opened each injector with 12v connector and injected carb cleaner through each injector, all showing a good even fan spray. Swapped no4 injector to no 1, refitted the injector rail and tried again from a cold engine started fine running like a sewing machine until engine got to 60c and tickover dropped to around 800 then code P0301 code P0300 P0302 back again with misfire 1 & 2 and lumpy tickover, have checked all over for leaks cleaned MAF sensor and Map sensor made no difference . I have sent for a fuel pressure regulator valve to see if that improves things but I am running out of Ideas. Any help greatly appreciated and thanks in advance. Looks like somebody was trying to re invent the wheel when they came up with this pile.
check the valves ( and vacuum are in the normal ranges, a vacuum leaks can really mess up the ECU ) to see if that's normal as p0300 is a miss fire and if it's not getting air in the cylinder it will do that. im not fully educated on these car's/engine's but older pre-2010 ish v8 🇺🇸 car's and DSM's but would love for the hemi to get this system upgrade
a collapsed or pumped-up hydraulic lifter in a stock SBC-350 V8 can make it run really ruff or lose power ect. but this takes advantage of it so it can do tricks
