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Weird Noise When My Car Revs To 5000 Rpm

RBTWENY5

By RBTWENY5,
in Engines & Forced Induction

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jutstar Enthusiast

jutstar

Posted
Posted

Dude,

Don't waste money on a dyno when its probably spark plugs ! When were they changed last ?

You want heat range 5 plugs, gapping them at 0.8 mm overcomes some missing problems

If its not Spark plugs I would go Coils, havn't tried the yellowjacket ones.

http://www.skylinesaustralia.com/forums/Mi...500-t32356.html

mad082 Grand Master

mad082

Posted
Posted

yes it sounds like either spark plug or coil pack issue. start with new plugs. if that doesn't help tape up the coils (there is a thread on here about how to do it). if that still doesn't work then it will more than likely be time for new coils.

i wouldn't go heat range 5 plugs. they are too hot and will just cause pinging due to higher cylinder temps. either BCPR6ES or BKR6ES are the 2 options. both will cost about the same and do the same job. ran both types in my 33

  • 1 month later...
robots Experienced

robots

Posted
Posted

I have seen it a couple of times on rb25det engines already. Like you gun it in 2nd gear, 4k, 5k, 6k and it like splutters. You think it should do the usual rev-limiter bounce, but it doesn't. It goes like brrr, like engine is running out of breath with very strange sound. Doesn't sound like the coil-pack misfire.

Anyone had this before ? When you rev it in neutral, nothing strange happens it just rev cuts at late 6k. Any ideas what could it be ?

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