Help Help Help

[carter]

hey guys, sorry if this topic has been posted up sumwhere else in here, but im in need of desperate help.

ive got a cefiro with a rb25 in it. wen i was changing my oil wen filling it up sum got in2 the 1st coilpack/sparkplug we cleaned it out n it was fine, took it 2 a drift practice last wkend and now my car has a major miss, under load it coughs n sounds like its dropping a cylinder, we put new plugs in it n it would only run low boost which is 6-7psi, put it up2 high boost which is 11-12psi n it would pop n carry on like its spiking. ok since changing the plugs again n gapping them to .6 and different coilpacks today it is now coughing n carrying on wen free revving ie just tapping the throttle.

it also sorta stalls after u rev it. we swapped ignitors on my mates car couple wks ago. n it was fine. changed afms didnt make a difference, im really stumped hey, if ne1 can give me sum ideas as of wats causing it etc id appreciate ur help.

thanks

carter

[turbo_brian]

Plugs: Gap them to 0.8 or 0.9mm for testing.

Coilpacks: check for cracks in the coil packs, common on CA engines, and also RB engines

Cylinder head: Check for oil down there, if you got some down there, clean it all out. If you have to, leave plug in and flush with fuel, then soak out with a sponge.

Other stuff: Remove the coil packs of the 'mis-firing' plug, take the rubber off the bottom of the coil pack, and clean with degreaser, also clean the carbon tip of the coilpack to make sure it will get a good connection.

Start the car with the coilcover off in a dark garage, see if you can see stray sparks from the coil pack, this usually signifies a cracked pack ($240 new from Nissan EACH).

If you are having issues finding the mis-firing coils, start up, then slide the ignitor out one but one, if the engine idles worse, then it's not the mis-firing pack, if it makes no difference, it's the culprit.

PS, to get better assistance from the guys, you should make the title better "help help help" doesn't say your having misfiring problems, etc and makes it harder for the specialised people to answer questions.

B.