High Revving Idle And Missing At High Revs

[matty_p]

Hey guys ive just recently purchased an R33 gts-t series one.

When i start the car on a cold start it is revving at 1500rpm. After a couple of minutes it slowly drops to 1000rpm. Is this normal? Also at about 5500rpm the car starts to missfire fairly bad. Just wondering if this could be related. What is my best solution to these problems?

Any advice would be appreciated. Matt

[TTT]

you just bought it.

who knows when it was last serviced.

change the spark plugs to start with..

here's my recent service speed hump..

http://www.skylinesaustralia.com/forums/Su...ed-t212729.html

I was getting missfire at high revs too.

pics might show you why..

as for revs, mine doesn't rev that high at cold start so I'm not sure why that might be.

Idle can be adjusted.

and warm idle shouldn't be 1000rpm.

[Krishy]

get your spark plugs, oil and oil filter changed.....and if it still continues then i guess check the boost controller sometimes people without knowing connect it back to front and that will cause the missfire as well.....idle at 1500 sounds ok to me and once its warmed up then it should go down to 1000rpm....

[Munkyb0y]

1000rpm at idle is too high for a 33gtst. it should be about 650-700rpm. you can easily adjust the warm idle via a screw at the vac idle valve thing at the rear of the plenum. this will probably fix your cold idle too. do a search.

as for the missfire, it may be plugs. if that isnt it. it may be coil packs. do a search. plenty of info

Edited April 15, 2008 by Munkyb0y

[Krishy]

i get my idle sometimes goes from 1000 to 1500 rpm depends on how its being driven....