K22SUP Posted May 24, 2015 Share Posted May 24, 2015 Hi guys my car when i accelerate hard after second turbo comes in had a stuttering holding back effect exhaust note changes from clear to burble if I gently appl throttle she accelerates clear hard to explain I have just changed all the plugs to bkr7eis few of the coil clip broken so they are all cable tied tight now and a have just been out and tried it seems a bit better but coil pack have obviously been turned as refitted now it feels bit better but I get like two stuttering flat spots at high rpm maybe around 4750 then it clears then it does it again then clears again not as bad as before the car has 1st cat removed second still in greedy front mount boost controller walbro fuel pump fuel pressure reg also all hard piped Hks 264 cams pulleys any ideas ? Coil pack timing out ? and recommended ways to test to get to the bottom boost is about 1 bar thanks edd Quote Link to comment Share on other sites More sharing options...
Nic Posted May 25, 2015 Share Posted May 25, 2015 Replace the coil pack connectors, if yours are broken that would be the most obvious cause of the misfire. How to guide http://www.mkivsupra.net/vbb/showthread.php?61141-How-To-Refurbish-coil-pack-connectors Quote Link to comment Share on other sites More sharing options...
K22SUP Posted June 10, 2015 Author Share Posted June 10, 2015 Hi guys coil pack connectors now changed and still have a slight hesitation it's as if she goes then holds back then goes again when second turbo is in only I was hoping clips would fix it it's not major as in she drives through it but am back to drawing board for ideas plugs are done clips are done maybe a coil breaking down ? Quote Link to comment Share on other sites More sharing options...
jza800 Posted June 10, 2015 Share Posted June 10, 2015 i had the same problem, it was my coil packs.. trye taking some water in a spraycan... then you can hear, if there is a crack on one off you coil packs.. Quote Link to comment Share on other sites More sharing options...
baldy Posted June 10, 2015 Share Posted June 10, 2015 Check the resistancE of the coil packs, should be 8-9 ohms I think it is. They should all have the same resistance. Quote Link to comment Share on other sites More sharing options...
K22SUP Posted June 10, 2015 Author Share Posted June 10, 2015 Thanks guys I have checked resistance seemed all ok take it you just sprayed water over them ? Quote Link to comment Share on other sites More sharing options...
jza800 Posted June 11, 2015 Share Posted June 11, 2015 the resistence can be within spec but still cut out on higere rpm.. mine did yes mount them again, start the car and let it idle tage the spraycan and spray on the coils if you have a crack on the coils, you will hear the idle change, as it will misfire on that cylinder.. Quote Link to comment Share on other sites More sharing options...
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