Coil Problem?

[Jamie72]

hey all,after fitting gtr injectors and wolf3d v500,my car was crap,as you would expect on a base map,

so a quick visit to the tuner yesterday he had it running ok in about 5 mins,ready for full tune today,pull up in his drive and all seems well,

they hook up the ex sensor and laptop,fire it up he yells.now the car is missing bad and wont rev,so obviously no tune done,suspect fowled plugs,

maybe a coil...after limping home i changed the plugs,no effect,then plugging each coil 1 at a time i noticed no change when no2 and also no 6 coil were

unplugged,so im guessing thsese 2 coils are bung? cant believe it! does it sound like im on the right track ?

a mechanic at work keeps pointing his finger at the wolf implying that it may be the cause but i find this unlikely? thanks ,Jamie.

[Nero_Tigre]

i rkn the coils are your problem, i had mad misfire and the car sounded and performed terribly, i just fitted a new set of coils and its running as smooth as ever. Id recommend either DIS coils or Splitfires, I got DIS cause they're cheaper and there doesn't seem to be much of a difference.

If you want to find out exactly what the problem is for sure; your best bet would be a dyno check, thats how i found out my coils were the problem, cost about $80 to $100, it saves alot of time wasting if your not sure what the problem is.

[The Dan]

Don't forget an injector problem will also cause a missfire.

[JET-25L]

Make sure the clips to the coilpacks are connectly properly and that there aren't any bent pins inside the clips.

Sounds a bit sus if it only just happened when they connected the tuning gear up... Doubtful that it's the computer. Sounds like spark to me! If you haven't already got aftermarket coilpacks you should have them before you go for the tune anyway as that will surely be a wall anyhow if youre looking for power and still have stockers.

[bubba]

Stock coils make power fine, they are just getting a bit old and it's cheaper to replace with Splitfires or whatever. A good mate is making 540awhp with stock coils so they can't be that bad

[blind_elk]

Have you confirmed it is the coils? It could be injectors, as said previously.

Have you got the sequencing for the coils set up correctly? And for the injectors?

Do some investigation and analysis.

Is the tuner a "Wolf tuner"?

[Jamie72]

Have you confirmed it is the coils? It could be injectors, as said previously.

Have you got the sequencing for the coils set up correctly? And for the injectors?

Do some investigation and analysis.

Is the tuner a "Wolf tuner"?

hey all,thanks for the replies ,the tuner is a wolf distributor,he had the car running ok,did that in 5 mins and was to come back next day for full tune,which i

did,was running fine until i pulled up in his drive and turned off the engine.

5 mins later his offsider setup the gas analyizer then the tuner jumped in with his laptop and told me to start it.now its missing!!,so he says no tune possible,obviously..this was yesterday,last night i changed plugs,checked coils by unplugging to listen for deteriation...

no change when cyls 2 ad 6 were unpluged.i repeated this a few times unplugging all clys 1 at a time.so now im thinking maybe 2 ciols..recheck this morning and 2 is now working

..recheck same.swapped coil 1 with coil 6.6 is still down despite the coil from cyl 1 which i know to be ok.so now i`m about to remove cyl 6 coil and spark plug to see if any spark.if yes then i`m going to swap a inj from other fireing cyl to 6 in order to rule out the injector.after that?? loom...ignitor...meh.all the while thinking what a horrible coincidence!

Edited September 17, 2008 by Jamie72

[Jamie72]

fixed! after checking spark ,pulled no6 inj,cleaned pins/plug,flushed inj,and now its running smooth as.

still a bit at a loss as the spark plug was wet with fuel from that cyl,but i`m not complaining .

thanks muchly for all those who helped.